Best Time To Plant Marijuana Seeds

If you are thinking about cultivating cannabis, one of the first things you will need to determine is if you should cultivate outdoors. With the summer growing season in full swing, many of you have reached out asking what's the optimal time to start an outdoor cannabis grow. Check out some recommendations based on different regions where marijuana cultivation is popular.

When is the best time to plant cannabis outdoors?

A number of states now allow cannabis cultivation for adult use, and even more states allow cannabis cultivation for medical purposes.

The increase in cultivation reform has resulted in a rise in interest in growing cannabis among cannabis consumers.

Cultivating cannabis can be one of the most rewarding activities that a person can do, and with a pleasant reward at the end of all the hard work (assuming the cannabis is grown right).

If you are thinking about cultivating cannabis, one of the first things you will need to determine is whether to cultivate cannabis inside or outdoors.

Why cultivating cannabis outdoors can be better than growing indoors

Cultivating cannabis outside has the following advantages over cultivating cannabis indoors:

  • Reduced equipment costs
  • No increased electricity bill
  • Larger harvest
  • Lower carbon footprint
  • Often easier to incorporate organic cultivation methods
  • Cheaper nutrient/input costs

Growing cannabis indoors has its benefits too, but for people that want a lower maintenance garden, cultivating cannabis outside is the way to go.

An obvious question – when is the best time to plant cannabis outdoors?

One of the first things that a grower needs to determine when planning a sun-grown garden is when to put plants into the ground.

A one-size-fits-all approach does not work. A number of factors are involved:

  • What is the latitude of where the garden will be located
  • What is the altitude of where the garden will be located
  • What is the precipitation level where the garden will be located
  • What will the temperature be like while the plant is in the ground

Ultimately what a grower needs to try to avoid is planting the plant(s) too early in the year, which could result in the plants dying due to the soil/air being too cold.

Also, the grower needs to avoid planting the plants too late in the season so to ensure that the plant(s) has enough time to go through a full growth cycle.

Generally speaking, you want to plant your plants in the ground outside in early to mid-May, similar to when it’s recommended to plant tomatoes.

Tomatoes do not grow exactly like cannabis, but for planting purposes, they are almost identical. With that being said, each part of the country is different.

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A great resource to look up the recommended planting date for where you live is the Farmer’s Almanac.

Simply enter your location and it will tell you when is the best time to plant tomatoes outside, which can double as the date for when to plant your cannabis too.

Getting started ahead of time is key

If you are growing from seed, you will want to germinate the seeds at least 6-8 weeks before planting.

A way to cut down on the prep time is to use a clone if you are able to. Clones are often harder to find than seeds. Each route provides its own advantages.

Growers can get a head start by letting their plant grow indoors for a few weeks prior to putting them inside. This obviously requires a greenhouse or indoor garden.

By allowing your plant to grow in a controlled environment while the air and soil outside is warming up, you give your plant some additional growth time, resulting in a larger plant.

Other tips that can help

If you live in an area where the warm season is shorter than in other parts of the world, there are two tricks that can really help.

The first is growing your cannabis plant in a container rather than planting it into the ground.

This allows you to move your plant to the most favorable parts of your yard to get the most sunlight as the season goes along.

Putting your plant in a container also allows you to bring the plant in at night when the temperature drops below a desirable threshold.

The second tip is using a concept known as light deprivation, or ‘light dep.’ This method involves cutting back on the sunlight time that a plant receives by cover the plant up after 12 hours of sun.

It’s a tricky method that requires using a tarp over a greenhouse or building a box that can go over your plant.

When you first plant your cannabis plant outside, the amount of daylight at that time is usually around 14 hours.

As the season goes along, and your plant is big enough, you can cap the amount of light it is exposed to at 12 hours and your plant will start to bloom faster than it normally would, thereby helping your harvest come sooner.

What’s the Best Time to Start an Outdoor Cannabis Grow?

I t’s amazing how quickly the world can change, isn’t it? In the past 25 years, cannabis has moved from an illicit substance relegated to the shadowy corners of the illicit market to an “essential” industry amid COVID-19. In many states, local cannabis laws allow you to grow your own, and why not? When you grow your own, you can do your own quality control, know the purity of your product, and manage your own supply.

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Luckily, you can start your own grow in a container as small as a flower pot. If you’ve got some space in your yard to grow weed outdoors, even better. So this may leave you wondering, when should I plant my cannabis outdoors? Luckily, there are some general date ranges to help guide your growing plans.

Regardless of which climate you’re starting in, when Spring Equinox comes around, start germinating your seeds. Make sure those plants get outside by Summer Solstice in June, then harvested around Fall Equinox.

For more specifics about how to protect your outdoor cannabis grows from the elements or whether you should grow indoors, outdoors, or in a greenhouse, check out the linked articles. Better yet, look into a book by celebrated cannabis growers like Ed Rosenthal’s Marijuana Grower’s Handbook, and of course, every green thumb’s favorite, The Farmer’s Almanac.

For a (shallow-ish) deeper dive into what to expect when growing cannabis outside, here’s a look at optimal grow times for regions across the U.S.

When to Grow Weed Outdoors by Region

Northwest (Northern CA, OR, WA)

When you grow outdoors in this loamy region you’ll never have to worry about getting enough rain. However, mold development and lack of sunshine can make growing outside a more difficult proposition.

Hybrids that flower earlier are suggested as the most successful grows, especially in Washington and Oregon. California plants can be put in the ground earlier due to the region’s warmer weather. Your best clue indicating that it’s time to start your outside grow is when daylight hours increase and the temperature starts to warm.

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Midwest (IL, MI, Eastern CO)

This region is tricky because the weather is highly variable; rainy and muggy, and/or hot and dry. Winter may come early to this region, so choosing an indica-dominant hybrid strain might be your best bet, since their flowering times are shorter. Try to shoot for germination after the final frost of spring has passed in these regions.

Northeast (NY, MA, ME, VT)

With its rich soils and abundance of water, the northeast region can be a great place to grow cannabis outdoors, especially if you choose an early harvest strain that can finish up before fall kicks in. The best time to move your plants outside in this region is the middle of April, when days are longer.

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Southwest (Southern CA, NV, AZ, NM, CO)

If you choose to grow outdoors in this scorching climate, be prepared to pay attention to the temperature, where highs that regularly exceed 100 degrees Fahrenheit will slow your plant’s growth. Sativas and sativa-dominant hybrids do well in this environment because of their lineage tracing back to the equator, where the weather is uniformly hot.

However, the dryness of the region means you’ll also have to carefully monitor your watering routines. Before moving your plants outside, make sure the last frost has passed. This last note is especially important in this region, as sudden, sporadic snowfall is common, so keep an eye on the weather.

Southeast (FL)

Though home cultivation is not yet allowed in the Sunshine State, many new medical producers getting into the industry are starting to grow outdoors, and there are a few things to be aware of if you’re licensed in the industry. The temperatures in Florida might be good for cannabis growing, but the humidity definitely is not.

In fact, because of all that moisture in the air, it’s best to avoid indica strains and grow sativas instead to avoid the mold that inevitably comes along with humidity. In this region, you could start the germination process as early as February. Just make sure that the last frost has passed before moving plants outside.

Conclusion

Of course, there are many different factors that go into the timing of an outdoor grow, and the weather will shift year-to-year. Use these estimates as rough guidelines and adjust as needed. Happy growing!

What’s the best time to plant outside in your area? Share in the comments!

Author

Erin Hiatt is a New York City-based writer who has been covering the cannabis industry for more than six years. Her work – which has appeared in Hemp Connoisseur Magazine, PotGuide, Civilized, Vice, Freedom Leaf, MERRY JANE, Alternet, and CannaInvestor – covers a broad range of topics, including cannabis policy and law, CBD, hemp law and applications, science and technology, beauty, and psychedelics.

Erin’s work and industry insights have been featured on the podcasts The Let’s Go Eat Show, In the Know 420, and she has appeared as a featured panelist on the topic of hemp media. Erin has interviewed top industry experts such as Dr. Carl Hart, Ethan Nadelmann, Amanda Feilding, Mark A.R. Kleiman, Dr. James Fadiman, and culture icons Governor Jesse Ventura, and author Tom Robbins. You can follow her work on LinkedIn, WordPress, @erinhiatt on Twitter, and @erinisred on Instagram.