The poor thing is cupping because of heat. Also the yellowing on the top new growth could be the PH is a little to HIGH. Also check the underside of the leaves, any BUGS, those brown spots look a little too much like bugs eating them. Also to me the soil looks very very DARK or almost black. That looks to be very very RICH soil, which will be on the up side of PH which is the reason for the new leaves being a lighter green/yellow or even whiteish color. I would check for BUGS, and PH too high most of all. Just go to Overgrow.com and do alot of reading, peace....MrP.