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how long before you can harvest marijuana seeds

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.

If you buy a clone from a grower or breeder it will be a seedling, so you can skip the seed germination phase.

What are a weed plant’s growth stages?

It’s important to know these stages and how long each lasts to know what the plant needs and when. Knowing where your cannabis plants are in their life cycle will dictate when to prune, train, and trellis your plants, and when to harvest.

Seedling stage length: 2-3 weeks

As roots develop, the stalk will rise and you’ll begin to see the first iconic fan leaves grow, at which point your cannabis plant can be considered a seedling.

In order to achieve the shorter 8.5 weeks, you need to choose a fast-finishing strain like Northern Lights and even still, at the low range, you’ll be growing tiny plants that produce just a few grams of smokable harvest.

From Day 1 of your marijuana plant’s life to a Smokable Harvest, you’re looking at 8.5 weeks – 7+ Months. Many factors will affect the total time, but the average grow takes 3-4 months.

Long Anwer:

Strains from warm climates like Haze 1 tend to have long flowering periods before their buds are ready to harvest, adding weeks or months to the time needed. Long-flowering strains often produce higher yields than short-flowering strains because buds have more time to grow.

Important Milestones in the Marijuana Plant’s Life

The time from seed to smokable harvest averages 3-3.5 months for me with a strain like Northern Lights, where I grow the plants for 3-4 weeks in the vegetative stage, growing with cheap, regular CFL lights in coco coir, and with that setup I can get a few easy ounces per plant.

Your cannabis plant’s vegetative growing stage starts at about the time when it has outgrown its seedling pot and is ready to be transplanted into a larger pot.

How long you can keep your cannabis plant in the veg stage will primarily depend on how much space and energy (electricity) you have. Obviously, you want your plant to grow as big as possible so you can enjoy a big harvest, but you also don’t want it to get so tall that it outgrows your tent or grow space. Having an approximation of your plant’s final height is essential in this case, as some spindly sativas can easily double their height during the flowering stretch. The same goes for some modern hybrids and even indicas.

If you’re growing photoperiod cannabis under 18 hours of light and otherwise suitable conditions, there is nothing that will tell your plant when to enter flowering.

PREPARATION TIME BEFORE YOU GROW

• Time to grow cannabis (8 weeks–7+ months) – The time needed to grow weed from the moment you germinate your seeds until harvest; includes the four growing phases of cannabis:

• Germinating your seeds
Time: 1–7 days

2. Seedling stage (10–15 days) – The “baby-phase” of your freshly sprouted cannabis plant.

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.