I don't know why it took this long, but I did some research on tropical sativas. From the help of wise people, I already suspected this was a tropical sativa, but after reading about them now I'm 100% positive.

Tropical sativas require a max of 500ppm, and not alot of N.
They need a 11/13 or 10/14 light regime to flower properly (or you will just get hairs, no calyx swelling-- exactly what i've been experiencing)
They flower for 15-20 weeks (105-140 days)
They require high humidity during flowering (60-70%), my humidity is exactly that.

Learning this, I purchased kool bloom liquid 0-10-10. Should get rid of my N problems.
drained the res, refilled it with tap and added only kool bloom (1 tsp per gal (50% strength)) making the ppm about 500ppm

Can JUST kool bloom alone be used for nutrients? for a long time?

I also adjusted my light schedule to 10/14.

Oh yeah the buds smell like bubble gum!!
Not the regular kind though, like the bubble gum from the dentist.


Heres some pics, I didn't really think they've been growing until I compared with my last posts...

Tell me what you think! can anyone else tell me anything about tropical sativas?

Oh the last shot is why you don't want to tie string around your stems too tightly. I guess it just grew over the string??