Even if growing outdoors, a lot of growers will start their seeds inside under an artificial light to help them through this delicate stage of marijuana growth.
Marijuana light cycle: 16 hours a day
Seed germination length: 3-10 days
There are a number of changes to consider once plants go from the vegetative stage to the flowering stage:
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.
When your marijuana plant becomes a seedling, you’ll notice it developing more of the traditional cannabis fan leaves. As a sprout, the seed will initially produce leaves with only one ridged blade. Once new growth develops, the leaves will develop more blades (3, 5, 7, etc.). A mature cannabis plant will have between 5 or 7 blades per leaf, but some plants may have more.
The Spring Equinox is a good reminder that it’s time to kick off the outdoor growing process and start germinating your seeds.
A common reason for heat stress is when your grow lights are too close to the plant canopy. If you spot signs of light burn, such as curled, wilted, and brown leaves at the top of your plant, move your lights further away.
Excessive moisture is also bad news for seedlings. When humidity levels are too high or when you overwater your seedlings, this can lead to the dreaded damping off, a deadly fungal disease. Seedlings will become weak and tip over, and there is nothing you can do to save them. Avoid extremely high humidity and overwatering, and make sure to use a sterile medium for germination.
Although heat, pH, overwatering, and soil are important, we’ve added the most vital point to the bottom of the list: lighting! Cannabis plants depend on light to create energy and thrive. At the end of the article, you’ll learn the best way to illuminate your plants.
10. HARVESTING TOO EARLY OR TOO LATE
Your planting pots need to provide good drainage. Usually, there will already be holes in the bottom. If there are no holes, as can happen when you buy standard plastic pots, you will have to make them yourself. Make sure there are at least 5 openings, each about the size of a penny. As long as soil doesn’t just fall through the bottom, you’re good.
Using the right containers for your weed might not seem like a big deal, but you’d be surprised just how crucial this variable is. Here are some factors you should consider:
People love their weed plants, so they think giving them more must be a good thing. But alas, it’s not. Overfeeding can lead to nutrient burn, or worse, nutrient lockout caused by accumulated minerals in the soil. In this case, you’ll need to flush your soil with water and start again with your feedings to return the pH to an ideal window. In short: don’t overdo it on the nutes!
The thing is, weed isn’t just weed. There are big differences in growing characteristics among different cannabis seeds. An indica autoflower will certainly behave differently than a picky photoperiod sativa. Some strains may be suitable to grow in a colder climate, while others may require a hot, sunny environment. Some strains may need lots of nutrients, while others require only light feeding. You get the idea.