ytou are cool to flower. you have good secondary growth and all around healthy plants. you just ddid a good job witht his grow and it vegged at a high rate. YOu shjould be proud that they are soo big so fast not concerned. what matters for switching to flower is pretty much the number of nodes. you have plenty of healthy growth to fuel the plant through flower. especialy with a hydro system. your plants can absorb nutes way fater so while in flower they draw less energy from them selves that soil grown plants.

FLOWER BABY.

what strain? just out of interest.