Hey, could be for a couple of reasons, what lights are you using? if its a floro then keep it 1 - 2 inches from the top of the plant, if its a HID of some sort then anywhere from 18 inches to 24 inches away. Secondly do you have a fan on the seedlings, if not i suggest purchasing an osciliating fan and stick it on them 24/7 that will strengthen the stems up and sort out your problem. Hope this help, good luck.

Happy Growing!
MikeOD Reviewed by MikeOD on . Thinning Stem Hey um my plant is about a week old now and it seemed to be doing perfect.....now the stem seems to be getting thinner by the day and it doesnt look as strong at all. I put a supporter on it and took it back off. Now it can stand up. I put it back on just because i want the best for my plant. The plant is about 1 1/2 inches tall and the first true leaves arnt big at all...like in the first stage. It still has those two round leaves at the bottom. My light cycle is 18/6.But does anyone know any Rating: 5