Looks like a potassium/phosphorous/PH problem.
faithless Reviewed by faithless on . still stuck on these fukin boat leaves! i have done threads b4 about the upside down boat shaped leaves and have had good feedback thatnx guys. but since then its got worse and i wanna get rid of it! Last time we came to the conclusion of root bound and overwatering, i have repoted and changed my waterin patterns. Im not very good with watering so that could still be a problem but i do have a lot more perlite to counteract it. Temp of room: 15 Degrees celcius, duno farenheight. Height of light from top of plants: bout 18 Rating: 5