first, you can save some money and veg with CFL's rather than the MH.
second, waiting for the plant to mature is the right thing to do.
if headroom is an issue, grow out the seeds, take clones, flower clones, shitcan male clones and parents, save parents of the best producing fems and start taking cuttings that you can flower as soon as they are firmly rooted.
do that and you are almost guaranteed as many female plants as you need and they will all grow at the same rate (being genetically identical) plus, they should all have the same potency, all other things being equal
justanotherbozo Reviewed by justanotherbozo on . Lighting Question Okay first post. Hope someone can help. I was thinking about getting a 400 watt MH light for veg in a 2x4 grow box and I already have a 1000 watt hps for flowering in another room. My question is whether this is enough light for veg to grow my plants just about 12 inches quickly (I plan on growing about 6 to 8 plants at this point by the way). The situation is that I'm trying to get the fastest yield possible. I know that a lot of people say to wait for 8 weeks or whatever, but I am just Rating: 5