The growth stages of marijuana can be broken down into four primary stages from seed to harvest:
Generally speaking, it takes anywhere from 10-32 weeks, or about 3-8 months, to grow a weed plant from seed. It’ll be quicker if you start with a clone or an autoflower seed.
Notes on marijuana growth phases
If you’re growing weed indoors, you can grow whenever you like. Keep in mind that the outside environment will affect your grow space—you may need to add heaters in the winter or fans and ACs in the summer. Other than that, you can start seeds whenever you like and flip them into flower whenever you like, depending on how big you want the plants.
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.
How long does it take to grow a marijuana plant?
Two rounded cotyledon leaves will grow out from the stem as the plant unfolds from the protective casing of the seed. These initial leaves are responsible for taking in sunlight needed for the plant to become healthy and stable.
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Unlike becoming the parent of a human, there’s a minimum age requirement — you have to be 21 — to legally become the parent of a recreational-use pot plant (different regulations apply to medical marijuana). And that six-plant limit? That’s per private residence — not resident — which means you can’t legally grow a dozen plants just because you split the rent with a roommate. Which brings me to another wrinkle that factors heavily into who does and doesn’t get to become a pot-plant parent in this fair city. Although not impossible, it’s far easier if you own the place in which you’re living and growing a pot plant. Even if your landlord doesn’t explicitly forbid the on-premises cultivation of cannabis (which he or she legally can), your lease agreement probably won’t cover the sort of modifications you might make to the property in your pursuit of off-the-grid ganja.
By late March, Diana Prince was stretching skyward and entering her flowering stage. Two months later, she was nearly as tall as me and appeared ready to harvest. Gun-shy from my earlier experience, I sought one last consult. (“Just going off your timeline, she is definitely ready,” replied Taylor — punctuating the sentence with a green emoji heart.)