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Cross-pollination between outdoor-grown marijuana and hemp is a budding conflict in Colorado, beyond

In Pueblo, the area of the state with the largest amount of outdoor-grown marijuana, the county regulators have been working to allow both hemp and cannabis cultivators to coexist

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By Bart Schaneman, Marijuana Business Daily

Outdoor marijuana growers are reporting an increase in cross-pollination from hemp farms, a development that could mean marijuana cultivators might lose upwards of tens of thousands of dollars if their plants become unmarketable as flower products.

As the marijuana and hemp industries increasingly share the same cultivation territory, the number of conflicts is likely to increase, particularly in areas with thriving outdoor cannabis cultivation.

Washington state is a case in point. In April, Gov. Jay Inslee signed Senate Bill 5276 into law, opening the state up to hemp production in response to the 2018 Farm Bill in part by removing the previous 4-mile buffer between outdoor marijuana grows and hemp farms.

At least one marijuana farmer has experienced firsthand the consequences of this change in the law.

“We took a big hit,” said Robert Morf, who owns and operates Cheshire Creek, an outdoor marijuana cultivation operation in Waterville, Washington.

He estimated he will lose about $40,000 this year after his midsized, 600-plant farm was cross-pollinated by pollen from the male plants he said came from a neighboring hemp grower.

All to extract

According to Morf, his flower is full of seeds, reducing the usable volume and overall quality and value of the crop.

He won’t be able to sell it on the wholesale or retail flower market and will take a financial hit by selling it all for extraction.

Morf has grown marijuana for three years “out in the middle of nowhere” with no other cannabis cultivators for 30 miles.

He didn’t have any trouble with his neighbors until the buffer was removed under the new hemp law.

The hemp grower who leased the land from the farmers across the road assured Morf the plants would be grown from clones.

Since Morf was there first with his marijuana operation, it was up to him to give the OK, and he took it on faith the hemp growers would remove the male plants.

He thought “cross-pollination would have been worse for them than it would have been for me.”

Morf contacted his local and state political representatives as well as his contact at the Washington State Liquor and Cannabis Board (LCB), but he found no recourse.

To prove it wasn’t his own plants that pollinated his field, Morf pointed out that the LCB’s tracking system will show that he planted from female clones.

“We’ve gone through three years of growing, and the most I’ve seen is a female plant with one bud herming off a stem last year,” he added.

“Herming” refers to a cannabis plant developing both male and female flowers.

Morf has considered suing, but he figures it’s not worth the cost.

“At this point, it’s ‘screw it’ and move on,” he added.

The hemp growers have left the plants cut down in the field and won’t be returning next year to farm that land, Morf told Marijuana Business Daily.

Silvia Sianez sweeps the last of the hemp into a bin to be dried on Saturday morning at Fern Farms outside of Greeley. (Joshua Polson, Special to The Colorado Sun)

Carefully source your seed

A similar problem is shaping up in the bordering state to the south, Oregon.

Pete Gendron, a grower in Sunny Valley and president of the Oregon SunGrowers Guild, estimated the cross-pollination issue is impacting about 8% of the state’s marijuana production.

In terms of total acreage affected by cross-pollination, it’s an increase from last year, he added.

That’s largely because the number of hemp acres has increased by about 500%.

According to Hemp Industry Daily, Oregon had 11,754 acres in 2018 and increased to 51,313 acres in 2019.

His advice to growers looking to avoid male plants showing up in their fields: Buy your seed from a reputable provider and try to make sure your hemp-growing neighbors are using feminized seeds.

Tell them, “if you pollinate me, you’re going to be pollinating yourself, too,” Gendron said.

“That being said, it won’t save you from field walking,” he added, meaning growers still need to check to ensure their plants haven’t hermed or that no male plants have grown from seed.

“It really only takes one (male plant) to ruin your day,” he said.

Colorado concerns

In Pueblo, Colorado, the area of the state with the largest amount of outdoor-grown marijuana, the county regulators have been working to allow both hemp and cannabis cultivators to coexist.

Steven Turetsky, managing director of Pueblo-based hemp grower Shi Farms, said hemp farmers have been asked to put their “best effort forward to not grow male plants.”

That’s in part because outdoor-grown marijuana has been a shot in the arm to the local economy.

The general sentiment is that hemp growers should all use clones to ensure the plants are females.

“Obviously, with cannabis, even if you plant from clones, there can be mutation,” Turetsky said. “But it significantly decreases the risk.”

He said he came to the realization that it’s beneficial for his company to act in good faith toward marijuana growers.

By also only using clones, his company has avoided dealing with vendors who might be selling nonfeminized seeds.

“We don’t want seeds, either,” he said.

According to Wendy Mosher, president and chief executive officer of Fort Collins, Colorado-based seed company New West Genetics, a grower will lose about 1% of total cannabinoid content if a field is cross-pollinated.

While Colorado is considered generally favorable to hemp compared to other states with marijuana programs, cross-pollination also is happening to hemp-based CBD farms in Colorado, she added.

When a hemp farm is cross-pollinated, the farmer can thresh the crop to try to salvage some of it.

Mosher said one male in a field a mile away can pollinate a crop, and it can be very difficult to determine the source.

“It’s just impossible to tell where it’s coming from,” she added.

USDA trying to help

The U.S. Department of Agriculture (USDA) acknowledges the cross-pollination issue and has set aside money to address it.

In October, the agency awarded $500,000 to a Virginia Tech research team to get better data on pollen drift.

The goal is to predict how and where pollen grains travel.

Researchers will use drones to track pollen, hoping results can inform regulations on how far growers should keep hemp and marijuana apart to prevent damaging cross-pollination.

“Having a validated and reliable long-distance transport prediction model for wind-dispersed pollen is critical to establishing appropriate isolation distances,” plant sciences professor David Schmale said in a Virginia Tech statement announcing the grant.

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Outdoor marijuana growers are reporting an increase in cross-pollination from hemp farms, a development that could mean marijuana cultivators might lose upwards of tens of thousands of dollars if their plants become unmarketable as flower products.

Tips for Growing Cannabis in Colorado

Sunday December 8, 2019

A s any Colorado gardener can attest to, the state’s unpredictable climate requires special accommodations to make it through the volatile growing season. This is especially true of Colorado cannabis home growers who must pay attention not only to the weather but all of their surroundings, as well. Today we’ll discuss best practices for growing cannabis in Colorado’s crazy climate. But first, let’s take a look at what makes the Centennial State’s environment so unique.

Understanding Colorado’s Unique Climate

Colorado is the highest state in the nation – literally. Colorado’s average elevation is 6800 feet above sea level, though even at its lowest point, no part of Colorado is below 2000 feet above sea level. As such, outdoor crops and home grows in Colorado are susceptible to very high UV light penetration. Though this may be a good thing in terms of THC levels, it also contributes to our unpredictable weather patterns. Additionally, its inland geography and thus inaccessibility to large bodies of water means that Colorado, in general, is a much dryer state than the rest.

According to an article published by Colorado State University, the average annual precipitation throughout the state ranges between seven and 60 inches depending on location. Hence, successful growing operations must accommodate their crops based on their geographical location. To be clear, cannabis crops need about 35 inches of water on average; dry climates require additional irrigation options, whereas wet environments may fair better indoors where growers can control their water intake and help prevent mildew growth.

Finally, different regions witness extremely different weather patterns. For example, The plains are prone to sudden, relatively dry (though potentially damaging) thunderstorms and hailstorms that can cause a drastic drop in temperature. This sudden stressor may cause cannabis plants to “herm” or produce seeds as an evolutionary mechanism to protect the plant’s genetic line. However, the mountains and western side of the state are much less affected by these storms.

Advice for Cultivating Marijuana in Colorado

Colorado may have unpredictable weather patterns, but that doesn’t mean the weed there isn’t high quality. There are a few best practices growers should consider if they are to cultivate a successful cannabis crop in Colorado.

Start Seedlings Indoors in March

Seedlings require delicate care. They need a warm home and precise moisture levels. By starting seedlings indoors, you help ensure that your plants will get off to the best start possible without risking a surprise frost or other harsh weather conditions. Furthermore, by starting them in March, they will be large enough to withstand harsh winds, soft frost, and pest infestation by the time the outdoor growing season officially begins after Mother’s day in May.

Use Pots When Possible

Pots and planters are great for those with limited space. Grow pots allow growers to move them as necessary to protect them from weather or increase their sun exposure. Growing cannabis in planters also helps control plant size and makes it easier to grow them covertly.

However, the roots of plants grown in pots are not nearly as insulated as those grown in the ground. If a quick temperature drop is expected, prepare by insulating pots with dirt, old blankets, etc. If high winds are also in the forecast, bring the plants indoors for the time being. Check out this article for more information on protecting your plants from the elements.

Consider a Greenhouse Grow

Greenhouses are both secure and reliable. Not only do they protect plants from pests and other elements, but they also protect them from intruders and help them remain compliant with local Colorado cannabis cultivation laws. Additionally, greenhouses help extend the growing season to increase yield. Though greenhouses extend the growing season, year-round greenhouse cannabis cultivation requires special lighting and black-out screens to simulate different photoperiods.

Be Aware of Cannabis Cultivation Laws

Home cannabis cultivation laws vary by state and region but in general, there are a few things every Coloradian must follow. First, adults can only grow up to six plants with half flowering at a time (seedlings don’t count). Those numbers double per household if more than one adult lives there (i.e. no more than 12 plants, six flowering, even if eight adults live in the same space).

Additionally, renters and those living in public housing are not automatically afforded the right to cultivate cannabis on the premises. It is up to the landlord or the state whether or not to allow personal cannabis cultivation in these places; consult your rental/housing agreement for more information.

Finally, cannabis plants cannot grow within a 100-foot radius of a school. Plants must also be locked and inaccessible to anyone under 18 years old. If there are children in the home, cannabis plants must remain in a locked room or greenhouse, though if only adults live in residence, a lock on the front door is sufficient.

Growing marijuana at home is truly rewarding, especially for Colorado home growers who managed to protect their plants through the state’s unpredictable growing season.

Do you have tips for growing cannabis in Colorado? Share them in the comments below!

Colorado's unpredictable climate can require special accommodations to make it through the growing season. This is especially true of cannabis home growers who must pay attention not only to the weather but their surroundings, as well. Let's discuss best practices for growing in this crazy climate.