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how long to grow cannabis from seed

As the sun reaches up high in the sky, your cannabis will want to as well. Make sure all of your plants are outside by the Summer Solstice.

Marijuana light cycle: 12 hours a day

When should you grow marijuana?

Be very careful to not overwater the plant in its seedling stage—its roots are so small, it doesn’t need much water to thrive.

The growth stages of marijuana can be broken down into four primary stages from seed to harvest:

If you need to determine the sex of your plants (to discard the males), they will start showing sex organs a few weeks into the veg stage. It’s imperative to separate males so they don’t pollinate the females.

3. Vegetative stage (2–8+ weeks) – The vegetative stage could last indefinitely if we’re talking photoperiod (non-autoflowering) strains. Most growers let their plants vegetate for a month or two, or until their plant has a reached a certain size. Bigger plants can mean bigger yields, but how long you veg depends on available growing space.

• Flowering stage
Time: 5–16+ weeks

THE GROWING STAGES OF CANNABIS

Once you’ve planted your freshly sprouted seeds with the first set of embryonic leaves (cotyledons) popping out of the shell, this is when the seedling stage of cannabis begins. These baby plants are only a few centimetres tall and have just one or two sets of tiny leaves. It will still take some days until your seedling will start to look like an actual cannabis plant with the typical serrated leaves. The seedling stage will normally last 10–15 days or until your young cannabis plant has grown 3–4 leaf nodes. Around this time, your plant will officially enter the vegetative growing stage.

You may already be set with some seeds and your grow room is ready to go. Great! In this case, there won’t be much prep time needed to start your grow. Otherwise, this period takes into consideration how long it will take to order and receive your seeds, as well as source any equipment such as potting containers and soil. This period will therefore vary depending on what you need, where you are buying from, the speed of your mail, etc. Expect the preparation time to take anywhere from 0–4 weeks if you still need some equipment before you can get started.

Moreover, the growing techniques you use will also determine the length of your veg; if you’re growing in a SOG, with many small cannabis plants grown together in close proximity, you will usually initiate flowering much earlier. With other training techniques like topping, plants need time to recover from such “high stress” treatment, and therefore veg is lengthened by a week or more.

Well, you’ve made it: at this point, your cannabis plants are in full bloom! Some strains have a 7-week flowering phase, while other flower for up to 14 weeks. Decide what you want before you start. Keep a tight grip on your grow climate in the flowering phase. If it gets too cold, bud development stagnates. High air humidity invites bud rot, mildew, and other pests to ruin your harvest.

SCReen Of Green (SCROG) instead accommodates fewer plants per square metre. Bending branches allows you to weave them through a screen or wire frame. That improves light distribution, allowing for SOG-like results using fewer plants in the same space.

Now comes the last stage: curing your cannabis and processing the trimmings. Never just dump your trimmed leaves in the bin; use it for good. You can make hash or delicious edibles from what’s left over: this plant has more to offer than buds alone!

Don’t Wake The Neighbours

That’s why I prefer to trim first, and then drying the buds in a drying net in the same room where I grew them. I allow fresh air into the tent and keep it flowing to cut mold risks. The buds take two to three weeks to dry.

Looking for genuine first-hand grow expertise, sleeves rolled up and boots in the mud? You’ll find plenty in our Nibameca blogs & grow guides ! Ever since discovering White Choco genetics, this cannaboss refuses to leave our AG grow program – and rightly so. This veteran grower is all about top quality, innovation and sustainability in indoor grow projects. This Amsterdam Genetics Grow Guru shares his experience with our readers to make the most out of every weed seed you’ll ever plant!

Germinated and planted: your grow is good to go!

Personally, I prefer the following high success rate germination procedure. I take a glass of lukewarm water and gently chuck in the seeds. Then, I leave them alone someplace dark for 12 to 24 hours. I check them regularly: as soon as I see white tips (taproots) emerge, I carefully pick up the seed with a pincer. I place them root-down into a pre-watered grow plug. I use a water and root stimulator mix following user instructions. Then I put the plug and seed in my propagator and patiently wait for them to surface.