can someone please tell me what's going on here. it's not any bugs, because i checked on it every 1 hour to see if any would come up, and haven't seen any. i even checked up under the leaves. and i think the browning is from nute burn. i have it in miracle grow soil, and i thought the leaves would be healthier if i sprayed some miracle grow plant food on the leaves, but i guess that made it worse.