Q&A with Jorge
I’m a first time grower. How long does it take for a seed to sprout? I am growing indoors and using very good soil. I’m using a 150w light. I planted two seeds one green and one white next to each other. Is that OK?
This sprouted seed was planted in a rockwool cube.
Good viable seeds soaked overnight in water should show signs of sprouting within 24 hours, at most 48 hours. You should see a small white tap root (radicle) emerging from the seed as a first sign of germination. Once the seed shows signs of germination, place it between a moist paper towel on a plate. Keep the paper towel evenly moist until the tap root is about 1 cm long. Once the tap root has sufficiently emerged, it is time to plant.
Soak marijuana seeds in water to hasten germination. At first seeds will float on top of the water. Viable seeds will moisten and sink to the bottom of the glass.
Green and white seeds are probably not viable and if they do sprout, they will be weak. A simple test to discern a viable seed is to roll it in between your index finger and thumb applying a little bit of pressure. If it crushes easily, it is immature and not viable. Another test is to toss it in a glass of water. In general viable seeds will sink to the bottom in a few minutes to a couple of hours. Non-viable seeds tend to float.
These marijuana seeds have sprouted and need to be planted. Planting seeds with such a long rootlet spends much of the stored energy within the seed and they could sprout through soil slowly.