giant pot plants

5 Tips for Beautiful Large Container Gardens

Planting a large container garden can be a challenge both physically and aesthetically, but there are ways to do this successfully without breaking your back. Use these five no-nonsense tips to help you tackle this project.

Save Potting Soil by Using Lightweight Fillers

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Start with the planting medium. If you have a really big container, you could fill the bottom with a lightweight material, which would save you money and decrease the weight of those incredibly heavy pots. Try anything from milk jugs to soda bottles. There are also products designed for this purpose, such as Better than Rocks, Packing Pearls, and Ups A Daisy, available at home improvement stores and garden centers.

The advantages of lightening the pot can be significant, particularly if you ever have to move the pot or are putting it on a deck or balcony where weight can be an issue. A large pot filled with damp soil and plants can be so heavy it could compromise the integrity of the structure over time. Generally, the more soil a pot has, the more it will retain water, and that can be a good thing. In a huge pot, though, it can take an enormous amount of water just to moisten all the soil in the pot.

If you do fill the bottom of your pot with lightweight material, it’s a good idea to separate the filler from the soil. To do so, cut a piece of plastic screening big enough to fit into your pot, and then put it over whatever filler you have in the bottom of the pot. Separating the soil from the other material makes cleaning up and emptying the pot much easier at the end of the season.

Avoid gravel. It does not improve drainage to put gravel or rocks in the bottom of your container and more soil is better than less.

Choose Your Plants Carefully

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While plant choice is important for any container, it is particularly essential for large containers. Plants can easily get lost and look dwarfed in a large pot. It’s a challenge to choose plants that will give you a container design that is interesting and balanced. Particularly with big pots, the container design principle of using “thriller, filler, and spiller” plants will help give your pot a cohesive look.

Thrillers: You may want either one tall and dramatic plant or a group of them. This could be a small tree or another great large plant, such as banana plants, cannas, grasses, palms, or shrubs. Using trees, shrubs, or large perennials that will survive the winter in your area gives you the advantage of having a good-looking pot year-round.

Fillers and Spillers: While it’s common to do mixed containers, don’t hesitate to use only one plant or several of one variety. For pots that are wider than they are high, even a low-growing ground cover like golden creeping Jenny or low-growing succulents can look stylish and interesting, particularly when you’ve got a spectacular pot.

Give Your Plants a Good Start

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When you buy your potting soil, find out if it has fertilizer already mixed in. It’s better to buy potting soils without it. Instead, mix an organic, slow-release fertilizer into the soil when you plant. Really mix the fertilizer well all through the soil in your container. This can be hard with a large pot, but you want to make sure it gets to the roots of your plants as they grow down.

Keep Your Pots Looking Good

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There are a few practices that will help your plants look beautiful:

1. Keep up with deadheading. While many garden centers say flowering plants don’t need to be deadheaded, it’s a good idea to remove spent flowers to keep your pot looking neat. Some flowering plants will bloom more if they are deadheaded; you promote reblooming by preventing seed production.  

2. Pinch back plants to make them bushy rather than leggy. Coleus, Persian shield, and many other branching plants will benefit big time from pruning. Pruning can help you fill out your large container by preventing your plants from getting spindly.

3. Fertilize your container regularly throughout the growing season. Many large plants are heavy feeders, so use a diluted liquid fertilizer every other week.

4. Make sure your plants are getting enough water. Especially with large plants, leaves can act as an umbrella, and light rain or hose water can be shed off the leaves and right out of the pot before it has a chance to reach the soil. You can tell you’ve watered both the roots and soil by watering until you can see liquid seeping out from the drainage holes in the bottom of the pot.

Finding Beautiful Large Containers

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A lovely, large container can be a piece of art and a focal point of your yard, deck, or garden. A lot of big beautiful containers also have big beautiful price tags.

You don’t have to spend a lot of money to get a fabulous container. There are often huge clay and enamel-painted pots at home improvement stores like Home Depot and Lowe’s, home design stores like HomeGoods, flea markets, thrift stores, and neighborhood garden centers.

Other ideas for large pots are:

  • One great source is Lechuza. These self-watering containers are durable, sleek, and fabulous.
  • If you want museum-quality art in a garden pot, consider Lunaform. These giant pots are hand-thrown in Maine, and each is more exquisite than the next.
  • Campania containers are well designed and some are drop-dead gorgeous. The company makes fabulous historical replicas in cast stone as well as lighter-weight pots. Campania pots are available at many independent garden centers.

These designing and planting tips for large container gardens will allow you to maintain a gorgeous garden year-round with minimal effort.