Plant seeds so that the white root faces downward, about a knuckle deep into your growing medium. The top of the seed should be just below the surface of your growing medium.
New Rockwool cubes have a high pH – too high for healthy cannabis seed germination. Therefore it’s important to thoroughly rinse Rockwool cubes in pHed water, then let them soak in pHed water overnight before use. Since Rockwool holds onto a lot of water, after soaking they should be given a few days to dry out before planting seeds or making clones.
When growers start their cannabis seedlings in a germination station, the seeds are usually germinated in a starter seedling cube.
Germination Method 5: Paper Towel Method
You can make a DIY germination station at home by putting a plastic dome over a plate on a heating pad.
When growing cannabis plants in a container, you have to choose the size of your pot.
Germination Method 3: Germination Station
Check on germinating seeds once every 12 hours or so (don’t disturb them or their roots). You can plant any seeds which have sprouted right away, or leave them for another day or two, to let the others keep up.
CFL bulbs (twisty/spiral bulbs as pictured to the right) are a great source of light for young marijuana seedlings
How long does it take to germinate marijuana seeds? Typically, it will take anywhere from a couple of days to up to a week to see your seeds start to turn into plants.
Some folks like to germinate their seeds in Jiffy Pots. You can buy these at nurseries and other places as little round disks.
A clear plastic cover on the top keeps the warmth in. You can make one of these at home or purchase one inexpensively at your local nursery or online.
Put a plate or other object under the bottom towel to prevent moisture damage and another over the top towel to keep the seeds in a dark space. When you see the white taproot emerge from your seeds, they will be ready to transplant. Make sure to plant them taproot down.
The paper towel method is a favorite for many home growers. Simply take two pieces of paper towel. Moisten them with water. Then place your pot seeds in between the two layers of moist paper towels.