How to grow marijuana from seed? 2020 Updated

How to germinate cannabis seeds?
Cannabis seeds require three things to germinate: water, heat, and air. Because of this, there are many methods to germinate your seeds. The most common and simplest method involves the use of paper towels saturated in water. Take two of the paper towels and place them on a plate. Then, place the cannabis seeds at least an inch apart from each other and cover them with the remaining two sheets of water-soaked paper towels.

Tips for Growing Marijuana
Proper growing conditions:
68-75 ˚F degrees is ideal
30-45% humidity is ideal
Keep the grow lights for weed on for 18 hours until the seedlings have grown to a size you prefer. (This amount of light replicates the hours of natural sunlight in the early growing season when cannabis grows in the wild.)

Best Lighting for Cannabis Seedlings
If you’re on a budget, fluorescent grow lights offer the biggest bang for your buck when getting light to you cannabis seedlings. Don’t forget to factor in the cost of electricity and bulb replacement. To make sure all my plants got an equal amount of light, I turned the trays 180 degrees every day. I especially liked the ease of raising the shop light one link at a time as the plants grew. You can maximize your light by using a room with white walls or surrounding your grow table with movable reflecting foil-covered cardboard or hanging sheets of Mylar—mirrors don’t work well for reflecting light.

Transplant into bigger pots when roots grow out of the bottom
The roots will start to grow out of the bottom of your smaller grow pot at which point it’s time to transplant. The plant will become rootbound and stop growing if you do not transplant.

To recognize the roots, look for white tips poking out of the bottom. Check for the roots each day and start giving your plants grow stimulator, which is high in nitrogen. 

What happens if I plant seeds or clones in a big container?
Your cannabis seedlings and clones will definitely survive in a bigger container; they just won’t grow as fast for the first few days or weeks because they aren’t getting as much oxygen.

With a bigger container, you will need to wait longer between waterings, and during that time your plant roots will be getting reduced oxygen.

If you’ve planted your young plant in a large container, try to give only a little bit of water at a time (enough to wet the area around the seedling roots) until the plant is growing vigorously. Once the plant has grown a few sets of leaves, you should start watering cannabis normally so that water drains out the bottom.

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