Help! Brown spots !

1st grow! Growing outdoor plants in 5 gal pots sunshine #4 growing mix using GH Flora series micro/gro/bloom. My plant in the last week slowly started to get minor brown spots on the edges of leafs and tips now its getting worse this morning i lowered my feeding see if that helps but what else could it be ? Mag issue? Add some epson salt maybe ?

Heres pics

Your fert has mag in it. you have dark green leaves with some tip burn which usually means over fert. don't feed so much.

polishpollack said:

Your fert has mag in it. you have dark green leaves with some tip burn which usually means over fert. don't feed so much.

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Ya i cut my nutes in half when watered/feed today see how that goes and flora series has mag in it ? Ill have to check the bottles