brown spots please help!

hey. man I've had a lot of problems with this grow, here's the latest, and probably the worst I've had so far. Pics below. Lower leaves developing brown spots. Like all over the place. This happened out of nowhere today after I gave it its very first feeding. I gave it like 1/5 strength foxfarm big bloom and grow big. 1/4 calmag, and 1/4 azamax for a pest control. I took that gallon and poured about 5 capfuls into a spray bottle and filled the rest with water and sprayed the leaves.

Again this was the first feeding. I had another plant that had brown spots(not nearly this many, like 1 or 2 and much bigger) and someone told me it was because of overwatering, and when I transplanted it this morning it was the most rootbound looking plant I've seen. But this is different because the spots are a lot more numerous and happened a few hours after I fed the plants. Temps are 73-77. Humidity 45-55. Now this tiny little fucker of a plant is almost a month old, so obviously extremely stunted, but that was because it took me a long time to get the airflow, temps, and humidity levels under control. They were extreme for a while.

Guys this is really concerning me because I have several plants in the growbox with this one and if it is some sort of disease I really need to know so I can remove the plant. I've got another much more mature plant that also has ONE of these brown spots on a leaf that I also discovered today. I foliar fed all of my plants with this same solution. I did not water the more mature plant.

Please help me somebody, I'm really concerned about this one.

ebenezerfagglegold said:

I foliar fed all of my plants with this same solution.

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Did you have your lights on while the foliage spray drops were on your leaves? I can't see your plants but I think the drops that remained on the leaves may have had something to do with the spots.

yes I sure did. I foliar spray with water a lot and this never happened, but I can understand that chemical spray is different, but the weird thing is that its just on the two leaves on the second node. that's it.

I wouldn't worry about it, it's probably from the transplant.

I didn't transplant this one. There was another one that had some spotting on it that I transplanted and it was rootbound as hell. This one Hasn't been transplanted yet. I'm afraid to right now because I topped it a week ago and now this. I don't want to beat it up too bad. It looks like a calcium deficiency but that cannot be. This only happened after I added calcium(among other nutes). Thanks for the replies guys I really hope its just chem-spray burn, but that is unlikely because only the two leaves on the second node are affected and none of the other plants were at all. So NO ONE has seen this?? BTW the pictures really don't do it justice, it looks worse than the pics make it seem. Or maybe its just that when its in the box with all the lights on it just accentuates any imperfection and makes it LOOK worse, idk