switching nutes????

I started flowering 2 weeks ago and im gonna switch to Dr. Hornbys BIG BUD. Should i flush the remaing nutes out or let them stay in the medium?????

i would transition, changing the ratios ... for example 100-0, 50-50, 0-100 ... that's usually what's recommended.

(assuming your first set of nutes are administered during watering, not the time-release variety)

ive been adding during watering ive been @ 9-59-8 and im going to 0-1-4 my grow medium is 1/2 worm castings 1/4 sagnum moss 1/4/peat moss this is my first grow.So how do i make the transition??plants look great and smell even better both are female and begining to show little white hairs on the cola