Flowers seem small

Im growing two ganja dwarf autos. Ive been a little worried about their development as buds are looking small but some hairs are beginning to turn color. the one i showed is further along and showed sex day 21 (keep in mind its an auto) and its now roughly day 55 and this is all ive got. Any assurances or advice would be greatly appreciated!

anyone?

Yes I agree they look small!

im pretty sure its nitrogen deficient. could that have anything to do with it and is there any way i could get them to bulk up a bit more quickly?