Just stick a thermometer on top of the soil.
Watch closely. Keep it under 85.
Keep the air moving.
stinkyattic Reviewed by stinkyattic on . veggin with a 400w mh! we just planted 6 germinated jamacian seeds tonight in red plastic cups and need to know if keeping a 400w mh about 2 feet above the cups willl be good? we dont wont it to be too hot but we wanna make sure we are doing it right! Rating: 5