1000watt growth trials
I am working on a project where I will be starting 18 flats of seeds. I have a metal halide lamp, with a digital ballast. This will cover my 5x5 area. Quick question, has anyone sprouted under a metal halide? I can certainly turn the juice down on the ballast. What's a good distance to keep my lamp from the plants but still insure strong stocky growth? By the way, the seeds are tomatoes.