Be gentle with them, get good at LST, don't overfeed them, and try to avoid disasters because it's a ticking clock. Defoliate the bottoms to boost those top buds, maybe around week 4 they'll start flowering...and possibly defoliate again once the rapid growth stops if you have excess leaves. And give em the best quality of light you have available, i kept one under a cfl too long and the others who got LEDs faster had much better fuller growth. ✌️ happy growing.