i actually had to start fertilizing them when they were really small. i dunno if i just have mutant plants or there's somethign terribly deficient abotu my filtered tap water, but yeah, they needed nutes WAAAAAAY earlier than they're supposed to. I was usign a really weak solution for the first week or so of that (check out page 3 to really see what i'm talking about) but now i'm using som more concentrated stuff and am using it for every other watering to see how that goes. i'll try and remember to post some pics tomorrow and show you all how it's going