Can anybody tell me what this may be

Does anybody know what this is causing the rusty brown spots

Im not judging, but do i see a bunch of old light burn cut away and removed? Maybe some leftover minor injuries from that. Is it new?

I made the mistake of using leaf feed 1 hour after lights off it seemed to burn them this was 8 days ago I have 2 other plants using the same water and they are absolutely fine

they are tiny spots, and it doesn't seem to be wide spread across the plant, so i think it is just a little bit of left over damage from the spray that killed tiny spots. The spots aren't indicative of deficiencies, i wouldn't sweat it

A101 said:

I made the mistake of using leaf feed 1 hour after lights off it seemed to burn them this was 8 days ago I have 2 other plants using the same water and they are absolutely fine

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Stop spraying your plants and see if the new growth is better.

A101 said:

I made the mistake of using leaf feed 1 hour after lights off it seemed to burn them this was 8 days ago I have 2 other plants using the same water and they are absolutely fine

Click to expand...

what strength did you folier feed with? it shouldent have made any problems appear unless you used too strong a feed