Whee thats high. Probably from the lime. Use a buffering agent (I use stuff for fish aquariums, you can get it anywhere) or vinegar to adjust a few gals to 6, and flush away!

The heat is whats probably causing the burn in your case tho, so Id def leave them in that green house until you get that under control. PC fans are your friend.
carinia Reviewed by carinia on . more problems not doin so goood indoors:( my babies arent doin so good the tips of the leaves all seem to be burning/turning brown from the tips inward 2 of my plants allready died from this and im wondering what i can do to stop it my soil is perlite, peat moss, humus, coconut husk fibres, composted manure and lime the ph is 5.5-6.5 its store baught soil n it has 0.5-0.1-0.1 for nutes and they are under 5 13w cfls and 4 26 watt cfls so i got 10800 lumens the cabnit is 2 feet high 2 feet wide and 15" deep i water them once a day and Rating: 5