Materials needed to grow cannabis indoors
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If you’re thinking about setting up your very own indoor cannabis set up but you don’t have much experience, you probably have a lot of questions. What are the materials needed to grow cannabis indoors? How much will it cost? These are two of the most frequently asked questions regarding growing cannabis indoors.
We’ve decided to write a full post on the exact materials needed to grow cannabis efficiently and affordably for all of the beginners out there that are a bit overwhelmed.
Materials needed to grow cannabis indoors | The first step
Before buying anything, the first thing you’ll need to do is figure out where you’re going to set it up. Are you using a full room, a wardrobe in your house, or a grow tent designed for cannabis growing? Depending on your chosen method, you’ll have to spend more or less money.
You need to calculate the amount of space you’ll need while also keeping in mind the fact that you’ll need to be able to move about and get to your plants and devices. You’ll also need to think about where you want to place the intake and outtake lines for your extraction fan.
Once you know where you’re going to grow and how you’re going to distribute the space, you’re going to need to make a shopping list.
Materials needed to grow cannabis indoors | The Shopping List
Shopping lists are highly recommended so that you don’t end up spending more than you need to spend on unnecessary or expensive things. If you take your time to have a look at the current market and options, you can save quite a lot.
Materials needed to grow cannabis indoors:
- Grow tent or reflective sheeting if growing in a room or wardrobe.
- Lighting kit designed for growing cannabis.
- An extraction fan to remove stale air.
- An odor filter in accordance with the strength of your extraction system.
- A fan for moving air around the room/tent.
- Pulleys for raising and lowering your lights.
- A timer for turning the lights on and off.
- Thermos-hygrometer to control the humidity and heat.
- 10m of pipe for your inline and extraction fan system.
There’s a longer list with more things that we didn’t mention, as they are usually things that everyone has at home anyway, such as duct tape, clamps, screwdrivers and other bits and bobs.
Materials needed to grow cannabis indoors | Step by Step
We’re going to have a quick look through the items we mentioned earlier on our shopping list so that you can figure out for your own which models work best for you and which ones you don’t need.
1- Grow tents / Reflective sheeting
In order to grow cannabis indoors, your plants need absolutely no light during their “night time” which is why it’s incredibly important to use a grow tent or set up a wardrobe so that no light can get it, or even better, a whole room – but this can be a daunting task.
If you’re planning on using a grow tent, there’s no need to worry as they’re fully sealed so that no light can get in. If you’re growing in a wardrobe or in a room, you will need to cover every inch of the walls in reflective sheeting for grow rooms, making sure that absolutely no light can get in.
- For wardrobes: you will have to cover all of the walls (not the floor or ceiling) of your wardrobe. You’ll also need to make two holes – one for each side of the extraction. It can be a good idea to compare different grow tents by size when choosing the right one.
- For rooms: it honestly may be too expensive to fully cover a room with reflective sheeting. We recommend starting at the bottom until the height you expect your plants to grow to, which is usually around 1.2-1.5m. You’ll have to make absolutely sure that no light is getting in from the door or the window.
2- Grow lamp / Lighting kit
When growing cannabis indoors, you absolutely have to use some sort of lighting system potent enough for your plants to believe that they’re outdoors, allowing them to grow and flower perfectly.
Your choice in lighting kit also depends on the amount of money you’re willing to spend, the space you have available and the amount of cannabis that you want to grow, as well as how strong you’d like it to be. Keep in mind that you’ll also be spending more on your electricity bills; a 250w HPS light uses much less than a 600w HPS light.
Once you’ve decided where you’re growing and you know how much space you have, you’ll need to buy a grow lamp that is in accordance with what you need. We’re going to have a look at the different types of bulbs that are generally used when growing cannabis and how much space each of them can cover.
Type of lamp, strength, average yield and space covered:
- 250w: 150g, covers 80x80cm at 25-30cm from your plants
- 400w: 300g, covers 100x100cm at 40-50cm from your plants
- 600w: 450g, covers 120x120cm at 60-70cm from your plants
- 100w: 80g, covers 80x80cm at 40-50cm from your plants
- 200w: 150g, covers 100x100cm at 40-50cm from your plants
- 400w: 350g, covers 120x120cm at 40-50cm from your plants
- 150w: 150g, covers 80x80cm at 20-30cm from your plants
- 315w: 315g, covers 100x100cm at 30-40cm from your plants
- 630w: 630g, covers 150x150cm at 40-50cm from your plants
The yields mentioned above are the average numbers obtained under normal growing conditions. Professional growers can definitely harvest more than that, and beginners will most likely harvest less. When it comes to the lamp distance, this can also depend in the growing conditions and your plants’ health. These numbers are simply a guide.
3- Indoor extraction system
Extraction fans are essential when growing cannabis indoors for two reasons. The first reason is that your plants need fresh air; they can’t sit in the same air for too long. All plants need certain levels of CO2 and Oxygen, which they use for different processes depending on the time of day (if it’s daylight or nighttime). The second reason is that if you don’t have an extraction fan, heat will build up in your grow room which is disastrous.
When buying an extraction system you’ll need to take down how large your grow room is (in cubic meters) and how strong your grow lamps are. There are other factors that influence the type of extractor you’ll need, and it can be quite hard to find the absolute perfect extraction system. Things like the temperature in your grow room, the temperature outside, the type of lighting and many others can also influence the extractor fan. We’re going to show you a quick solution to figuring out the type of extraction that you need.
If you’re going to be growing cannabis in a 1.2×1.2x2m grow tent, you’ll need to use this equation:
1.2×1.2×2 = 2.88 x 60 = 172.8m 3 . This is the strength that your extraction fan will have to reach to be as effective as possible.
This calculation is done by taking into account the temperature outside your grow room and your lamp strength. In this example, the temperature is 20° and the lighting system is 600w:
600/1.28 = 468 m3/h is the extraction speed that you need due heat difference indoors and outdoors.
This calculation allows you to keep the temperature in your grow room at a 4C° difference compared to the outdoor temperature. If you’re taking in 20C° air, your grow room will stay at 24C°.
4- Inline fans
Inline fans are just as important as extraction fans, although if your extractor is strong enough it can create negative pressure which can cause air to come into your grow room without any sort of extra inline fans. This only works with Grow Tents, as they tend to come with passive breathing holes, although if you’re using a room or grow tent you’ll need to sort out air in-take yourself.
In order to calculate the inline fan strength you’ll need to calculate a fourth of your extraction strength. So, if you have a 1.2×1.2x2m grow tent and a 600w lamp, you’ll need a 468m3/h extractor. So, for your inline fan you’ll need to calculate 468/4 which is 117m3/h – this is the type of intake that you’ll need.
5- Carbon filter for indoor growing / scrubber
When you grow cannabis indoors the biggest giveaway is usually the intense aroma that cannabis plants let off during their flowering period. If you don’t want anyone calling the cops on you, we highly recommend installing an odor filter of some sort.
In order to know what type of filter you’ll need, you’ll first need to know what inline fan and air filtration system you need. We did this earlier, so let’s skip to it; we know that the 1.2×1.2x2m grow tents need a 468 m3/h fan. Now, all you have to do is find an odor filter with the same sized opening and slightly stronger.
This means that the perfect odor filter for this set up would have a 125mm opening and should be almost 500m3/h. This avoids any mishaps with the filtration system, which can happen if the filter strength is less than the actual extraction itself, causing air buildup. If this were to happen it may be fatal for your plants, especially if you don’t realize that it’s happened.
The extraction fan may break due to overexertion and your plants may get sick due to breathing old, stale air – you may even have some problems yourself, as the smell will begin to build up and depending on the legality of your situation, the police may get involved. Remember that your odor filter should always be slightly stronger than your extraction fan when it comes to m 3 /h.
If you have an extraction system then you’ll also need an inline fan systems need ducting which needs to be durable, flexible and fully opaque, and obviously the same width as your inline fans and other devices such as filters.
For your inline system to pull as strong as possible, your ducting will need to be as straight as possible. Every bend in your ducting system means that you’ll lose a bit of strength, around 50%, which can reduce your carbon filter and end up stinking up your building as well as being quite bad for your plants, providing them with less fresh air than they need to successfully grow.
Having a fan in your grow room is an absolute must when it comes to the materials needed to grow cannabis indoors. Two of the biggest factors that fans affect are plant breathing and the heat in the room or tent.
Proper ventilation is incredibly important for plants to breathe, and an oscillating fan does wonders for rustling your plants’ leaves which induces breathing. If you grow plants with absolutely no fan or any sort of air movement in the room, your plants will grow super weak, as a slight breeze helps them to get stronger and hold up more flowers. Plants grown indoors without a fan are also more susceptible to insect and fungi infestations.
Fans can also help to remove some of the extra heat in your grow room generated by your lighting system. Excess heat near the tips of your plants can cause them to grow thin and wiry and their flowers may end up opening up and losing quite a lot of terpenes.
Pulleys aren’t really that incredibly important but they are super practical. Pulleys allow you to raise and lower your lighting kit and reflector whenever you want. Many people set up a rope system to save a bit of money, but honestly pulleys aren’t that expensive when it comes to how much easier they make it to get stuff done around your grow tent or room.
Having a timer in your grow room means that you don’t have to manually turn the lights on and off every day in order to keep your plants in the growth or flowering periods. It’s pretty impossible to do for so long, anyway. Timers aren’t that complicated, just make sure to get a decent one; if you decide to cheap out and get a bad or faulty timer, it may not work correctly and end up completely ruining your plants.
Thermos-hygrometers are designed to give real-time readings of the relative humidity in your grow tent or room, as well as the temperature. These devices are vital when it comes to giving your plants the right parameters to grow in – cannabis plants need a specific temperature and relative humidity during each period in order to develop properly.
Most thermos-hygrometers also keep a record of the highest and lowest of both readings, so you’ll know if something is wrong when it comes to your plants’ night cycle. This makes it much easier to know exactly what it is that your plants need in as far as their environment.
Materials needed to grow cannabis indoors | Conclusion
As you can see, the materials needed to grow cannabis indoors are varied but not that complicated. You essentially just need 10 things to successfully grow cannabis indoors. The only things we left out of this post are the seeds, substrate and nutrients. Well, what are you waiting for? Get to it, make your shopping list and take your measurements. There’s nothing more satisfying than growing your own plants from start to finish. See you next post!
The materials needed to grow cannabis indoors vary quite a lot; we've put together a list of 10 of the main things you will need to grow cannabis indoors.
10 Essential Supplies for Growing Marijuana Indoors
If you’re new to growing marijuana, it can sound like such a huge and expensive undertaking…
That even though the idea of it interests and intrigues you…
You quickly get overwhelmed by the idea of having to spend into the $1000s, plus the huge amounts of information on the topic…
…and eventually put the idea on hold.
But the truth is:
Growing your own marijuana is far easier and cheaper than you might imagine…
All you need is a few basic supplies and it doesn’t have to cost you more than $600 for an indoor grow, and much less even for an outdoor grow.
It will save you HUGE amounts of money after the initial investment, because you’ll produce more buds than you can smoke…
And they will be so potent and tasty…any herb you had before will pale in comparison.
Which is why in today’s post you will learn:
- The first steps on how to grow your own marijuana;
- The different growing setups, and;
- A list of basic, marijuana growing supplies to get you kickstarted…
First, you have to decide on…
Growing Marijuana Indoors vs Outdoors
While the general consensus is that indoor growing is ‘better’…
The fact of the matter is, whether you should grow in- or outdoors, all depends on your specific circumstances .
Growing indoors takes more skill, maintenance and is less forgiving…
But if you know what you’re doing, the quality of your nugs will be out of this world in terms of:
- Flavor, and;
That doesn’t mean the quality of your yield will be bad in an outdoors grow…
It’s just easier to get those bomb-ass nugs in an indoor grow.
On the flipside:
If you’re going for quantity, an outdoor grow will out-yield an indoor grow by a pretty large margin, with the same number of plants.
In an outdoor grow, your marijuana plants will be larger and full of vigor, producing insane amounts of yield.
So as a general rule of thumb:
- Growing marijuana indoors takes more skill and maintenance, but will produce a higher quality yield ;
- Growing marijuana outdoors takes less skill and maintenance, will produce lowerquality yield , but a much higher yield with the same number of plants and is much cheaper .
But these are not the only differences you should consider…
If you want a year-round harvest and are not living in a tropical climate…you only got 1 choice: growing indoors .
Now, growing indoors does actually bring some extra benefits with it:
- Your marijuana plants will be much less vulnerable to thieves and animals pecking away at your babies. Keep your plants for you and you ONLY .
- It’s much easier to clone your plants. To get yourself free and extra crops of your best plants.
But growing outdoors, brings some additional benefits with it as well:
- It’s much cheaper. All you need are some pots and quality soil.
- You’re growing your plants how Mother Nature intended it to be, which probably has some benefits that are yet unknown.
- If you use a greenhouse, you eliminate many typical outdoor problems like pests and dust pollution.
For most people growing indoors just seems to be the more practical method. Not everyone has a private garden and marijuana thieves are a serious problem.
Next up we have another one of those age-old debates…
Hydroponic Marijuana vs Soil
Is hydroponic growing better, or soil?
Again, there is no ‘better’ method.
But here’s the deal:
When you’re just starting out, I highly recommend you start out with soil, because:
- It’s cheaper;
- Easier to maintain (costs less time), and;
- Much more forgiving than hydroponic growing.
Besides these main benefits growing in soil has a few added benefits like:
- Your marijuana will taste better;
- It’s better suited for small spaces (if you’re short on space);
- It’s more natural, so probably has more hidden benefits (I don’t believe we are smarter than nature).
Reading all these benefits, you might be wondering:
Are there any reasons to choose hydroponic growing over soil?
If you’re prepared to invest your time and learn hydroponic growing properly and accept that maintenance time will be high when you’re learning the ropes of hydroponic growing…
Hydroponic growing actually is an extremely rewarding growing method.
Because it’s easier to control the whole growing process, especially the amount and pace of nutrients, oxygen and CO2 your plants receive…
You’ll receive some benefits over soil:
- Quicker harvest cycles because of reduced vegetation times. Which means more total yield for you;
- Increased yields per grow;
- Easier to get more potent yields;
- Higher density planting leading to increased yields per square foot.
Hydroponic growing essentially is ‘ power growing ’ and is the highest yielding grow method…IF you apply the techniques and maintain your grow PROPERLY.
There are different types of hydroponic growing, which you can learn about here:
Next up is a list of growing supplies you’ll need to get started growing indoors…because let’s be real: indoor growing is what 80% of you will do.
Growing Indoors: 10 Essential Marijuana Growing Supplies
Any marijuana plant needs 4 essential elements to grow:
- Nutrients, and;
What this means is that the growing supplies which provide these 4 elements are absolutely essential .
But to grow marijuana properly indoors, you’ll need a few more extras that support these 4 elements.
Without further due…here’s what you’ll need for a proper indoor growing setup:
- Marijuana Seeds;
- Grow Lights;
- Medium to Grow (Soil, Hydroton, etc.);
- Nutrients and Supplements;
- Pots or Buckets;
- pH and PPM Testing Tools;
- Carbon Filter;
- A Grow Tent.
You might be thinking:
Those are a lot of supplies and the list sounds expensive.
Well, here’s the deal:
If you’re going to grow in soil and going for a 4ft x 4ft space with 1-5 plants, you can easily stay under $650. And your lights will be the main expense here.
In such a grow-setup you can easily yield 4 pounds (1800 grams) of smoke-able high-quality herb.
And if you didn’t know already…
$650 for 4 pounds of quality herb is more than 10 times cheaper than what you would pay at a marijuana dispensary or pharmacy (where you would pay 4 x $1750 = $7000 for the same amount).
Now, if you’re going to grow hydroponically…depending on which system you go for, the cost can add up quickly to over $1000. Because you’ll need more supplies.
But still…even this is 7 times cheaper than buying your marijuana at dispensaries.
Now let’s dive deeper into each item on the list…
1. Marijuana Seeds
Captain obvious speaking:
You can’t grow marijuana without seeds (unless you clone, but I assume that’s not an option for you at this time).
And the quality and strain (genetic make-up) of your seeds will have a MAJOR impact on your results.
How you ensure the quality of your seeds is by buying them from a reputable seedbank with lots of positive and trusted reviews.
But your specific strain is also a topic to think about.
If you’re looking for a specific effect, of course, go for a strain which is known to produce that particular effect…
But with your first grow, you will want an easy grow and a large yield.
Indoors, Indica-heavy strains are easier to grow , flower much faster and will produce a larger yield than Sativa-heavy strains.
Indica-heavy strains are much more compact, which means they need much less space and are more forgiving in case of growing mistakes.
Here are some tried and tested Indica-heavy strains:
- Northern Lights Autoflower Fem.–(CropKingSeeds – Worldwide / Seedsman – UK)
- Purple Kush Feminized–(CropKingSeeds – Worldwide / Seedsman – UK)
Now, if you really want to grow Sativa-heavy strains, I recommend you take a hybrid. Because 100% Sativa strains are really not that well suited for compact indoor growing setups.
Here are some tried and tested Sativa-heavy strains, that are actually pretty well suited for indoor growing:
- White Widow Fem.–(CropKingSeeds – Worldwide / Seedsman – UK)
- Sour Diesel Feminized–(CropKingSeeds – Worldwide / Seedsman – UK)
Next up we have your piece that will have to replace the sun…
2. Grow Lights
Since you’re growing indoors…
You’re going to have to replace sunlight, which is by no means an easy task.
And most beginning growers are extremely scared of the electric costs of a grow light…thinking it will quickly add up into the hundreds.
While this is true for certain types of grow lights, covering large spaces…
A high-quality LED light will hardly add something to your electric bill.
- Spider Farmer SF – (EpicLEDGrowLight > 3% off coupon code: HERBONAUT/ Amazon)
There are many more options when going for a LED light and I cover the 5 best of them here:
Now, the initial investment is higher if you go for a LED light though.
The other option you have is an HPS light, which is a cheaper initial investment but will be more expensive in terms of electricity and replacement costs (you’ll need to replace it every 1-6 months, depending on the quality of your HPS light).
Do realize that ventilation will be more important with an HPS light because it generates way more heat than a LED light…so don’t cut corners when buying an exhaust fan if you decide to go for an HPS light.
To operate, an HPS light will need a ballast for power and hood/reflector which reflects all the light to your plants.
If you’re just starting out, an easy option is to get a full HPS grow light kit which includes both the ballast and the hood.
- Apollo Horticulture 400 Watt Grow Light Digital– (Amazon)
A general rule of thumb with grow lights is to get 50 watts per square foot.
Let’s say you get a 4×4 tent. Then you will need 16×50 = 800 watts.
You have 2 options here:
- Get 1x 1000W light, or;
- Get 2x 400W lights.
Getting 2x 400W lights will be better for your plants because you can position them more easily and optimize the spread of your light…
But, if you’re going for an HPS light at least, getting 1x 1000W will be cheaper.
If you buy pre-made lights you won’t need any hanging ropes.
But if you go for a DIY light, you will definitely need a way to hang your lights.
The most secure and flexible (flexible as in easily adjustable height) to hang your lights is with:
- Rope Ratchets– (Amazon)
Next up we have your…
3. Growing Medium
Since plants can’t float around in the air…
You also need a growing medium to support your plants.
What type of growing medium you use, is fully dependent on whether you’re growing in soil vs hydroponics .
If you choose to grow in soil, you’ll need (surprise, surprise) soil as a growing medium.
An easy way to get started is with pre-made soil which is ready for use straight out of the bag .
- FoxFarm Ocean Forest– (Amazon / Grower’s House)
If you choose a hydroponic system, you’ll need an inert medium like hydroton or lava-rock.
- Hydroton– (Amazon)
Another important to note here is that soil actually is a supplier of nutrients and an inert medium like pebbles isn’t, it’s just there to hold your plant in place.
And that’s why the nutrients and feeding schedule of soil is different than a hydroponic system…
As you will learn when we talk about the building blocks of your marijuana plants…
4. Nutrients and Supplements
Nutrients When Growing in Soil
Just like every living organism, your marijuana plants need nutrients to grow.
Without nutrients, no plants. It’s that easy really.
But what kind of nutrients you need depends on:
- Whether you’re growing hydroponically or with soil, and;
- If you’re growing in soil: whether you’re growing in organic super-soil, organic high-quality soil or just normal soil (normal soil is not recommended).
If you’re growing in organic super- or high-quality-soil, you might need a small amount of nutrients to adjust nutrient-strength levels or work out a deficit after the first few weeks when you’re plants are deeper into their vegetative stage and/or start to enter their flowering stage…
But most of the nutrients will already be in your soil, and you might even overfeed your plants by adding extra nutrients.
Still it can be helpful to add small amounts of organic nutrients to your plants once they get into their flowering stage.
Classic example soil-based organic nutrients:
- Fox Farm Big Bloom Fertilizer– (Amazon / Grower’s House)
Now, if you’re growing in regular soil, you’ll definitely need a good set of quality nutrients.
But I don’t recommend growing in regular soil as it’s just much easier and more natural to grow in organic super-soil packed with nutrients.
Nutrients When Growing in a Hydroponic System
When you’re growing hydroponically, it’s your water that provides the nutrients.
And since water naturally doesn’t have the nutrients your marijuana plants need…
You will definitely need nutrients.
When you mix water with nutrients, that’s what’s called your nutrient solution. And you will feed your plants with your nutrient solution.
Classic example nutrients for hydroponic systems (you need to combine all 3):
- Jacks Hydroponic 5-12-26 Jack’s Professional– (Amazon)
- Jacks Calcium Nitrate 15.5% Nitrogen 18% Calcium – (Amazon)
- Pennington Epsom Salt– (Amazon)
Remember that your plants will need a different nutrient profile per growth stage (vegetation vs flowering). Check out this page for a guide on nutrient profiles for marijuana when growing hydroponically.
Next up we have…
5. Pots & Buckets
Since we’re growing indoors and can’t make use of the ground…
We’ll need something to put our growing medium and plants in like pots, buckets or containers.
Now, if you’re growing in soil smart pots are great to start with.
Because they really do protect you from some common mistakes like:
- Bad soil;
- No root binding;
- Root rot.
They are a bit more expensive than regular pots but well worth the price.
The size of your pots depends on your grow space, but if you want decent sized plants go for at least 5-gallon pots.
- Smart Pots 5 Gallons– (Amazon / Grower’s House)
If you’re growing hydroponically you don’t need fancy pots.
Usually, you’ll use buckets.
And if you get a pre-made hydroponic system (which is highly recommended if you’re a complete beginner to hydroponic growing), the buckets usually are included with your system.
Next up we have the lungs and cooling mechanism of your grow environment…
If you’re going to replicate nature…
Your plants are going to need a steady flow of fresh air with CO2.
And the best way to provide them with fresh CO2-rich air is through proper ventilation.
But there’s another very important reason why you want proper ventilation…
High temperatures can quickly destroy your crop. And proper ventilation keeps the temperature in your grow room / grow tent in check.
Proper ventilation consists of 3 parts:
- Active air exhaustion;
- Passive or active air intake, and;
- Air movement.
For proper ventilation, you need all 3 of these elements to be present.
Depending on your budget you have many options to buy ventilation supplies…
But when you’re starting out, there are 4 essential things to keep in mind:
- Know the volume of your grow area / grow tent (4x4x6 ft. = 105.6 cubic ft.);
- Get a fan which has AT LEAST a Cubic Feet per Minute (CFM) rating that is equal to the volume of your grow area / grow tent;
- If you’re going to get a carbon filter (to filter unwanted smells) add 25% to that number;
- Get a centrifugal inline fan;
- An exhaust fan is more important than an intake fan.
For beginners, I recommend using a passive intake (a hole or 2 on the opposite end of your exhaust fan in your grow tent) and an inline exhaust fan that satisfies the above requirements.
If you’re going for an inline intake fan, make sure to get a fan that’s 10-15% less powerful than your exhaust fan. This is because you want to keep negative pressure in your grow space. Negative air pressure ensures all the air passes through your carbon filter.
- Hurricane Inline Fan 4 in 171 CFM – (Amazon / Grower’s House)
Here’s how you hang your fan:
- Rope Ratchets– (Amazon)
Every plant has an optimal temperature level at which the maximum level of photosynthesis takes place.
But with marijuana it’s even a bit more complicated:
Different strains have different optimal temperature levels at which they produce the most potent buds.
To create the perfect environment for your particular strain it’s important you keep the temperature in your grow room / grow tent at this optimal level.
And since, unless you have some special powers, you have no clue whether the temperature in your grow area is at this optimal level…
You really need a thermometer.
Now, a basic thermometer is cheap, and all you need when starting out.
- AcuRite Indoor Humidity Monitor – (Amazon)
Next up are the essential tool-kits…
8. pH and PPM Testing Tools
Marijuana plants not only have an optimal temperature to grow…
It’s ESSENTIAL that you keep the pH levels (acidity or alkalinity) of your soil or nutrient solution (when growing hydroponically), at an optimal level as well.
Because pH affects:
- Nutrient availability;
- Nutrient leaching;
- The bacteria in your soil, and;
- Your soil structure.
Get your pH wrong and your plants will suffer severe malnutrition and it will be very hard to save a crop of prolonged cases of malnutrition.
Either the potency and taste of your buds will SUCK or your plants will flat out die.
The optimal pH-levels:
- Hydroponic grow: pH 5.5-6.5 or game over;
- Soil-based grow: pH 6.5-6.8.
It literally is a matter of life-and-death for your plants…
Luckily there’s a very handy tool that will help you keep the pH in check: a pH-meter.
Now, soil and water (hydroponic growing) have different pH meters. So don’t buy a pH-meter before you’ve decided on soil vs hydro.
Classic example pH-meter SOIL :
- Dr.meter 3-in-1 PH Acidity Tester – (Amazon / Grower’s House)
Realize that when growing hydroponically it’s important you get a quality pH meter that works in water. Because your pH will be more susceptible to fluctuations than when growing in soil. Plus, as you’ll read below…when you’re growing hydroponically you want a quality PPM- / EC-meter as well. Which means it’s best to immediately get a combo-meter (pH and PPM).
A high-quality pH- and PPM- / EC-meter isn’t cheap and one of the reasons why growing hydroponically is quite a bit more expensive than growing in soil.
Classic example pH- and PPM- / EC-meter HYDRO:
- Bluelab Combo Meter – (Amazon / Grower’s House)
It’s also important you actually have an easy way to adjust your pH when it’s off.
Again, this is especially true if you’re growing in a hydroponic system because of the potential swings in pH values.
Soil actually acts as a natural buffer, as long as you feed your plants with a slightly alkaline nutrient solution (above 7 pH).
You can easily do this with a pH control kit:
- General Hydroponics pH Control Kit – (Amazon)
Then the EC/PPM/TDS Meter…
The question is: do you really need one?
If you grow in the soil it’s useful but not necessary.
But if you’re growing hydroponically, you will definitely need one.
Your nutrient-strength-level is less variable when growing in soil than when growing hydroponically.
When growing hydroponically, your plant’s roots are directly exposed to your nutrient-solution and small fluctuations in strength-levels can have a huge impact on the growth of your plants.
Combine this with the fact that your marijuana plants need different nutrient strength-levels at different stages in their growth process…
And you’ll quickly understand why a PPM-meter is important when growing hydroponically.
If you give your plants fewer nutrients than they need, you’ll severely stunt their growth. And if you give them more nutrients than they need, you risk burning your plants.
With a PPM-meter, you can actually measure the nutrient-strength of your soil or nutrient solution, and keep the nutrient-strength at the optimal level.
- Bluelab Combo Meter (pH and PPM) – (Amazon)
For a chart with a general overview of recommended nutrient-strengths per growth stage, click here.
9. Carbon Filter
Even though I absolutely LOVE the smell of weed…
I don’t really want my whole house smelling of marijuana.
But when you’re growing indoors, this really can be a problem.
Luckily, there’s an easy way to eliminate 95% of the smell: a carbon filter.
So although this is not an essential tool to grow your marijuana, it is essential if you care about odor.
In the ventilation chapter, you learned that you should get an exhaust fan that has a CFM rating that’s at least equal to the volume of your grow area / grow tent.
Your filter should be the same or close to the CFM rating of your exhaust fan.
- Phresh Filter– (Amazon / Grower’s House)
Do realize that choosing an isolated spot for your grow is much more effective than any filter.
10. Grow Tent
Although a grow tent isn’t absolutely essential…
If you’re growing indoors a good grow tent is highly advisable.
The other option you have is to grow in a room or closet.
And while it might seem unnecessary to get a grow tent, if you have a spare room or closet…
A grow tent will ease and support your growth process in many ways:
- Easier to control pests;
- Light reflection (helps your plants grow stronger and faster);
- Lightproof environment (prevents stress on your plants);
- Isolation (of smell and infections);
- Easy temperature and humidity control (prevents stress on your plants).
With a properly setup room or closet, you’ll have exactly the same benefits…
But if you’re a beginner, getting a grow tent will save you loads of time and effort.
Besides a quality grow tent is easy to move, very affordable, and will last you at least a couple of years.
These are the best grow tents I recommend:
- Apollo Horticulture Grow Tent – (Amazon)
You now know which supplies you need for a basic indoor growing setup.
But this is only half of the story.
Now you need to know how to set up your growing space…
And how to actually grow your marijuana.
Which is what we will cover in the next post:
Learn what supplies you need to master your first grow, get the best setups for beginners and amazing tips to maximize your yield!