The first set of round leaves are called the Cotyledon, cannabis is a "dicot". Meaning they have 2 cotyledons. They are formed in the seed along with the root and the stem. They are not actually true leaves. So don't freak when they die off.
Lit Up Reviewed by Lit Up on . when to start using lights After the first true leaves start to pop out from within the two round leaves which push the stem out of the seeds, do you use lights straight away? Or do you wait untill they are bigger. i.e. they are a week since germination now. thanks Rating: 5