pH - 5.6-5.9 air temp 78 water temp 70-72 rh 40-50 seedlings with 4" roots with many per plant, started 1/4th to 1/8th technaflora nutes a few days ago, these seedlings were nute burned and root dried at a early age (hence the bad first set of leaves) but have made a awesome turn around so far. Just wondering what this is for yellowing viens on the healthy new growth??? ***** I know on second picture the second set down has white patches which im pretty sure was from heat stress from a while back**** just looking at the tips of the top most which have been this way for about 2 days so I dont think its nute burn as last time it happend in hours not days. thanks!
For lights I have a 600W HPS dropped to 400W at the top of the chamber about 3+ ft about top of canopy w/ 2 28W CFL's 3inch above them to provide blue light spectrum