plants dying and i dont why!

the leaves on my plants are goin brown and crispy from the bottom up. i thot this was a heat prob but because of where my grow room is i cant install an extractor fan so i leave the door to it open the majority of the time but it doesnt seem to be doing much good. is this a prob with the heat or something else? this is my first grow so i'm learning as i go. any help is very much appreciated.

Id put money down that its a disease. Id have said fertilizer, but I assume you havent changed brands? I am by no means an experienced grower, its just that I cant see room temperatures doing that. Its almost like they are chemical burned. Perhaps a mad girlfriend or spiteful co-caretaker?

OUcH! My babys just got burnd this past weeknd, pretty badly to. But DAYM urs look straight fryed! If u put ur hand under the light where the top of the plant is does it burn ur skin? If not they ur fine and its a Major nute problem.Man i really wish u good luck with them and i hope u find wats wrong asap

If there is any chance to save them id have to say FLUSH FLUSH FLUSH. Plain ol water and check your soil ph.. Adjust accordingly with ph modifiers. If you catch it and it is not a disease you are probably fine.

GIVE THEM BLOOD MEAL, take off all of the fucked up leaves, including the yellow ones. Dig up about an inch of soil from the pot, add 2 tablespoons of blood meal (if they have a good root system), mix repack and water.. wait a few days to see them come greener

godkas is right on. When in doubt flush it out. PH your water before flushing or buy some distilled water. Then check the ph of the run off. This may help you in deciding what went wrong.

iv only used the same fert from the start.when it first happened i thot it was nute burn so i cut right back on feeding them and it continued and only recently started feeding them a bit more after which sum of the leaves near the top of them bushed out and got a bit greener but no major improvements. ill try flushing and the blood meal. thanx for the advice

Hope all works out. Keep us updated.

Hurts just seeing those photos!!! hope I never see something like that again!

okay.. almost looks like what happened to a friends project... he let his roomie take care of it for a week... and he forgot to water it as well as never operated the temperature controll system...

no water... + temperature too high = dead plants.

sorry to say..... ultimately, they failed... and it was time to start agian.

If you want to try to keep'm flush them out... hope that you get something out of it.