I would transplant them right now. I start all my babies in one gal pots. It promotes faster root development when you have them in a larger growing medium. But not too big. Thats why I say a one gallon. When the soil is moist below the root system the roots stretch out to get at it. Bigger roots = bigger plant. But that is just my opinion, backed by a little scientific evidence of course. And get some h2o2 if you are not using organics. But since I see you plan on using ffof then I wouldn't recommend it. But if not it is a great way to get some extra o2 to your babies roots systems. And as far as your 1000mh is concerned. I would have to agree with the other posters. Wait until your plant reaches its 3-4th leaf set then put the 1000 18 inches away from the canopy. And don't use any nutes until then. MJ plants don't even need that much nutes in the beginning because they barely have enough roots or bio-mass to uptake them, thus burning the little guys is really easy. Anywho happy growing yall! []Deace!
