I'd flush immediately, feed with a weak mix of solution C (your most complete fert) and one drop per gallon superthrive. If you flush after the re-pot, all that crap is going to be passing through the fresh soil, you'll need way more water to flush it, and it will just sit there WET because the roots haven't gotten into the new pot yet to use the moisture. And that can lead to rot.

Tehn I would wait until the plants are rather dry and slip the rootball out for a re-pot.

Your first watering after the re-pot should be with the same mix plus 1 tablespoon per gallon unsulfured molasses.
stinkyattic Reviewed by stinkyattic on . Post Flush Nutrients With my work schedule I have only had time to revamp my grow area. Moving my plants away from the heat of my 1000W HPS. Saturday I am planning to FLUSH my plants and re-pot them into 5 gal. buckets. As advised in another post. Then feed with 1/4 strength complete fertilizer. Which fertilizer should I use? Nutrients are not my strong suit and I'm confused. I Have; (A) 1.5-4-5 with 1% Calcium and .5% Magnesium or (B) 10-15-10 with .10% Iron,.05% Manganese,.05% Zinc or (C) Rating: 5