@Blackadder, Hard to say since I was using all new equipment and havent tried to grow since back in my younger days in a closet with no knowledge lol. If I had to guess Id say I left them under the humidity dome too long with bad light placement (just sat a small LED on top of the dome). Can too much heat cause that stretch? Thats actually one of the issues im having with my grow room at the moment, although I plan on fixing that with a dedicated ac unit till fall hits.
The LED I was using was from the small propagator I got from Nirvana so not sure how good it is.
like