could this be nute burn?

Hi everyone

A few nights ago I switched my girl over to flowering. She had been doing fine, and then today when I turned on her lights her leaves were saggy and some were beginning to dry out.

Two days ago i added food (GP Bloom & Micro) and she had been fine until this morning. When I turned off the lights last night, she was fine as well.

I thought it could have been heat stress, but she started looking this way after the lights were out for 12 hours...

Needless to say, I've taken out the water with fertilizer and replaced it with plain, and i've turned off the 250 MH (inside a 2x2x5 growlab) and turned on a pair of 26w CFL's to lower the heat (roughly 85 degrees F)

Anything else you guys can think of that I can do? I'm hoping this doesn't hurt her too much and she can bounce back.

Is this what nute burn looks like in the beginning? Everything I found online showed what looked like dried up leaves... but I can't think of anything else this could be from. hopefully I caught it in time.


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Thanks!!

don't know too much about hydro, but that sure looks like nute burn to me

Another thing I found was moisture stress... but I don't know if that applies to hydro. This is the first time I've grown that way.

looks like nitrogen burn, do you have a ppm meter?

unfortunately no - I do have one for soil, but not hydro.

ppm tester for soil? do you mean ph soil tester? If your doin hydro i think you might wanna invest in a ph and ppm meter. I almost killed ALOT of plants cause i moved and didn't bother checking my water. 2 of the best tools you can have in your garden reguardless of soil or hydro

whats the NPK of the GP Bloom & Micro.

im not sure that's nitrogen burn - but yeh, like Max said, a ph/ppm meter is a good tool to have.