Seedlings need lots and lots of light. Even a sunny window is probably not enough. If seedlings receive insufficient light, they become spindly and leggy as they reach towards the light source. We recommend placing grow lights a foot or so above your seedlings for 14 hours a day. Artificial light cannot replace the intensity of direct sunlight so it is important to compensate with longer growing days.
Fluorescent lights are ideal because they don t produce as much heat, which dries out seedlings.
Keeping the seedlings moist without letting them become wet or soggy is tricky, but crucial. We recommend watering from below, and covering the flats with plastic wrap. This keeps the planting medium warm and moist until the seedlings sprout. Once the seedlings emmerge, remove the wrap so they don't suffocate. Seedlings are generally ready to transplant four to six weeks after sowing when they have two sets of true leaves.