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All were very nice*

Ok, so you mean you didn't feed them yet?

I fed them 1/4 does like u said but I only fed half to make sure they wouldn't get burned first and this one was one of them I didn't feed yet,it was really nice last night as I said after the flushing and had no browning on the leaf till I woke up this morning and as soon as I seen it I posted the pic,it cant be from heat can it?

All the others look nice and healthy and have no brown spots like that one,

Well that's odd...

Could it possibly be heat stress?

Maybe I have a heat spot in that corner from the mylar reflection?my Mylar isn't perfect and has a few wrinkles in it, I was planning on letting them dry out from the flushing and I was gamma fed them then but idk right now..

Btw I have a few more sprouting up in cut in half water bottles

maybe too early to nute?

There over a month old and that one didn't get any nutes sins the flush yesterday and it wasn't brown like it is now

SykonoT wrote: that one didn't get any nutes sins the flush yesterday

Did it get nutes before the flush?

They had the mirical grow nutes before but they all took good to it and thats when they picked up there color,I did water them a few days before the flushing,but I still don't see how it got burned after the flush unless I didn't flush as well with that one as I did with the others,also that's one from the nute burn I had the first time

The only thing I did new was add the mylar yesterday and flushed them

maybe this plant developed some form of flaw and reacts to certain fertilizers differently.

I ws thinking similar,maybe it's not as tough as the others/weaker?but its one of the bigger ones

It looks good in this pic but here u see the damage better

The lower leafs were the burn it survived

I thought about this during the night

That was pre-fertilized miracle grow soil right?

It must have been time released fertz in the soil, so the more water you add the more fertz are released...

For the moment I think you would be best to not flush any other of the plants. Let this one dry out completely and then just add regular amounts of water

I'm going to have to research this a bit to see if my theory is correct...

They say miracle grow sucks and I'm pretty sure this morning that that's one of the reasons why.