lower humidity, increase heat to 75-80F, add CO2(can increase temps up to 90 or so), good circulation, proper ph and tds, ohh and last but not least add more light with the correct spectrum. i might be missing something, or wrong about something, but thats my humble opinion my friend. remember though if your temps are higher and lower the humidity, you might want to back down the nute strength a little because the plant is going to be transpiring more and could cause burning(?) could anyways........