Regardless of which is best for plant health, it's a proven fact that marijuana plants given a full 24 hours of light a day will grow at least a little faster during the vegetative stage (however, you may consider back down to 18/6 if your plant is sick to help it recover from problems faster).
Give plants only 10 or 11 hours of light a day to get buds to mature faster
3.) Give Plants 24 Hours of Light per Day During the Vegetative Stage
With a well-chosen strain and a good setup, one can harvest several ounces of buds in less than 4 months indoors, which is nearly impossible to do outdoors in the same timeframe.
You can get a marijuana plant to start flowering by ensuring that it gets 12 hours of uninterrupted darkness each night, often referred to as the 12-12 light schedule.
2.) Choose A Quick-Finishing Strain of Marijuana
Some strains are 'auto-flowering' and go through their whole life cycle regardless of light cycle or anything you can control. These strains tend to be ready to harvest in only 2-3 months from seed (though you should definitely expect smaller plants with relatively small yields when choosing an auto-flowering strain).
Check out Johanna’s full video series on how to grow weed on Leafly’s YouTube .
A lot of classic weed strains that have been around for a while come in feminized form. Some popular fem seeds are:
Because they grow and flower quicker, growers can fit in multiple autoflower cannabis harvests into the span of one regular harvest.
Also, buying from a reputable breeder or seed bank will give you a sense of what a particular strain will look and smell like, how it will grow, and how much it will yield at harvest.
Autoflowering strains require some preparation, as they will grow quickly and start to flower whether or not you’re ready for them.
If buying from a reputable breeder or seed bank, growing from seed is the best way to ensure your plants will have solid genetics and start clean, meaning they won’t come with diseases or pests.
Pros and cons of growing autoflower
Growing marijuana takes a certain level of commitment: time, energy, and financial resources, so be sure you can commit to the whole process.
But if the seed you found looks decent, you might as well germinate it and see what sprouts.
Cannabis growth is made up of a series of stages that plants undergo during their lifecycle. Each stage during the cannabis cultivation process requires its own unique demands, including different levels of light, water, and nutrients.
1. Germinating Seeds
It can take anywhere from 4 to 8 months to grow a cannabis plant, this varies based on where you’re growing. If you have an indoor grow room, your plant has the ability to flower after only a few weeks!
2. Seedling Stage
Female: Two pistils (the pistil contains the reproductive parts of a flower) will be growing on the buds (flowers grow above these leaves, one cluster on each side).