Im in the blind here

hey guys,i noticed some burns on 1 or 2 of the fan leaves on top. wish i knew what to do. looking for advice and answers to my problom. wasnt a hole leaf but a corner of it.some of the plants bottom 2 leaves are a bit yellow,looks from watering but not burned.

Could it be too hot out here? 90 - 100. or is this the issue with miracle grow,each has bout 30% mg in it.

is there a reason my post go un answered? maybe cause of the pic? should it be a thumbnail size? anyways, i still need help with my questions. would appreciate and i can post back on ur own topics.