yeah I'm having the same problem with the week stem. For some reason I think its my light, its not strong enough last time I was using MH this time I'm using CFLs. Plant a stick then tie a string to together with the plant stem for support. BE VERY VERY gentle I tried to do it not realizing how week they were and bent the the stem bad, but I was able to fix it. Also have a gentle fan blowing on them cause that will give strength up the stem