The temperature for germinating cannabis seeds is best at 78° F (25° C) because both low and high temperature impairs germination and growth.
The best conditions are native conditions so if you know what type of cannabis that you are growing, you will be able to better match the optimal growing conditions for that variety.
When your seed has sprouted and is growing then your plant is ready for its vegetative growing environment. They will be better able to handle cooler temperatures, more intense light, and lower humidity levels.
Be sure to avoid high temperatures and lower intensity of light levels since this will stunt growth and cause a very ‘lanky’ formation of the plant.
Necessary Air (Oxygen) During Germination
The last basic necessity for seed germination is air so if a seed is allowed to be in a very moist, soggy growing medium, it will cut off all oxygen supply to the seed.
Another common way seeds get deprived of oxygen is by planting them too deep in the medium, this is because the moisture and depth of the seed will cause a lack of oxygen and your seed will not thrive.
Cannabis seeds come provided with enough food within their shell for them to be able to germinate and break through the soil. But, if seeds are planted too deep in the ground, they will not have enough energy for them to be able to break through soil that is too deep.
A good rule of thumb for planting cannabis seeds is to plant them about a quarter of an inch (0.25 inches or 6 mm) deep.
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