The biggest variability in how long a marijuana plant takes to grow will happen in the vegetative stage—after the seedling phase and before flowering.
If you’re growing outdoors in the Northern Hemisphere, growers usually get their seeds between February and April, and you should start your seeds by the end of April. Some growers will start their seedlings inside in a more controlled environment because seedlings are more delicate, and then put their seeds in the ground outside once they’re a little bigger. If you’re growing clones or autoflowers, you have a grace period of another month or so. Plants usually need to be outside, in the ground, by the end of June.
How long does it take to grow a marijuana plant?
If you’re growing indoors, you can force a weed plant to flower after only a few weeks when it’s small, or after several weeks when it’s big. If you’re growing outdoors, you’re at the whim of the seasons and will have to wait until the sun starts to go down in fall for it to flower and then to harvest.
Seedling stage length: 2-3 weeks
The first marijuana plant stage begins with the seed. A cannabis seed should feel hard and dry, and be light- to dark-brown in color. An undeveloped seed is generally squishy and green or white in color and likely won’t germinate.
Harvesting early is better than harvesting too late. The weed won’t be as potent, but you will still get something out of it.
As a general rule, the seedling should be kept at 77˚F with a humidity of around 60%. Often, marijuana prefers a light cycle of 118-hours of white light per day once the leaves have emerged. You should be using a nitrogen-rich fertilizer at this point. Remember that all this is a rule of thumb. To get the best results, read up on the requirements of your particular strain.
One option is to buy more seeds from a seed bank. This way, you can keep buying and trying different strains.
6. Pruning Your Marijuana
And then there are other states, in which recreational marijuana is legal. In fact, Colorado, Alaska, Massachusetts, and Maine make no distinction between medicinal grows and legal grows. In other words, any adult of legal age can cultivate marijuana in their home, but there are limits as to how many plants you can have.
As a result, you should look out for feminized seeds. Seed banks often sell this type, so they shouldn’t be too hard to find. If you use regular seeds, there is a 50/50 chance you will get male or female plants; with feminized seeds, all your plants will be females.
Furthermore, the end of the vegetative stage provides a vital opportunity to look for males in your crop. As plants leave this stage, the females will start developing two white pistils, where males will grow pollen sacs. If you see these sacs, remove the plant from the vicinity before it pollinates the females and ruins your harvest.
Now comes the tricky part: Figuring out when is the right time to harvest! You will have to keep a close eye on your plants to determine when it’s the right time to reap them. Your timing can affect the smell, taste, weight, and potency of the final product.
Dry trimming takes place after your entire stash has been dried, and little water content remains within the buds and leaves. Trimming dry buds is definitely easier on your scissors since they won’t become as inundated by clumps of resin. However, accurately manicuring dry buds can be somewhat of a hassle too, making for a potentially less visually appealing final product. Moreover, dry trimming does require a fair bit of space. Growers usually hang entire branches of buds from a line of string within temperature-controlled rooms to let them air-out until sufficiently dry.
Growing cannabis comes with a lot of uncertainties. That said, cannabis cultivation itself can be broken down into five distinct stages, regardless of which seeds you’ve selected.
If you see “nanners” or anything resembling a cluster of grapes protruding from flowers or anywhere on the stem then you have a male cannabis plant. Should you see both hairs and nanners then you have a hermie to remove right away.
You can trim your cannabis plants in one of two ways: wet or dry. Both have their own advantages, and each grower will differ in which one they prefer. Wet trimming refers to trimming off the sugar leaves surrounding the buds immediately after harvest while the plant still has a high water content and feels “wet”. This method is the most common, and arguably the easiest, as it doesn’t require a large room to dry out plants beforehand. However, wet trimming is literally sticky business. The resin from the flowers will cover both your hands and your scissors, but there is an upside to this. By scraping the resin from your scissors every now and then, you’ll quickly build up a supply of “scissor hash”, allowing you an early taste of your harvest.
At this stage, the focus of the grower and plants switches to the production of buds and the grower is already dreaming of a frosty marijuana harvest in the near future. RH needs to be reduced to 40-50% and temps kept between 20-28°C.
While the photoperiod strains can be kept in veg weeks or even months to allow for all kinds of pruning and training to boost yield like topping, FIM, LST or even a ScrOG the Auto grower is somewhat limited by time.
If you opted to use the dry trimming method, then your flowers will be ready to cure straight away. If you chose wet trimming, then your flowers will need to be properly dried before you go on to cure them.