Mg def? Heat stress? Please Help

Hi
I gave about 3 weeks girls who are starting to show some bad symptoms ... I'm not sure if this is Mg def or something else. Grow room is a little hot, but it everything was fine in the beginning ... Used flora nova micro and grow once, growth was accelerated, but even the newest leafs are showing dark spots at the edges. There are also brighter spots in some leafs .... two separate issues? Can anyone help?

OK, you have 3 week old plants that were only fed once, right? All plants are showing symptoms? How long after feeding did this show up, and much much did you feed? What are you growing in? What light are you using? Thanks

They may be actually 4 weeks old when I think a out it. I fed them after all of my plants started showing symtops. All my plants are showins symptoms already and one plant s 2 weeks younger that the rest. It really puzzles me. Growing medium is organic soil, 400 hps.

sh00zkosmosu said:

They may be actually 4 weeks old when I think a out it. I fed them after all of my plants started showing symtops. All my plants are showins symptoms already and one plant s 2 weeks younger that the rest. It really puzzles me. Growing medium is organic soil, 400 hps.

Click to expand...

If you are using organic soil, I would not feed right now as they will have enough nutes in it for now. Do you have an idea of your ph? That could be an issue. Ph is critical and should be maintained at 6.5 in soil. They are too young to be deficient in anything, so it has to be your soil in my opinion, as long as your light is far enough away at this stage. The plants look good though so keep your eyes open, but I wouldn't worry that much. Peace

I'll try to check my ph, thanks.

Getting your ph perfect is spot on. Dont overwater. Let them dry out in between waterings so the roots can breath and grow.

Gand Green is a good source of advice... You should already have a Ph meter or be getting one soon. I didn't and it cost me.

thats a ph issue

what are you growing in?

when your ph is off, that plant can't absorb the nutrient thus your plant basically starves

If using soil I would amend with lime, will keep your ph right on track and check your nutrient solution after mixing it with a good ph tester.. Keep it around 6.5 and you'll be gravy

Your plants don't look too bad. I've seen worse.
As others have said, it's just a PH issue most likely.