How high is the lamp above the plants?You can keep a 400WT 12-15" over the top of the seedlings,heat will cause stretching too,are you using a fan?A fan will make the stems more rigid,point the air current between the lamp and the plants,so there is some motion and air movement in the plants,keep the fan on constantly....bonbon
bonbon Reviewed by bonbon on . HELP FIRST TIME GROWER!! hello guys, ive just started a little ebb and flow set up and i have some questions about some stuff. First of all my system is a 9 plant system. for a growing medium i am using rockwool and expanded clay pelets together. I germinated the seeds in rockwool and then placed the whole cubes in the expanded clay pelets. Ive got a 400 watt mh on them right now on the 18/6 schedule and theyve grown about 4 cm with 4 leaves on them. It has been about 2 weeks since germination. 2 types of leafs in Rating: 5