I’d spray for about 2 weeks once you start to see white hair and see what happens.
From what I know about CS, the particles are so fine they pass through the plants cell walls and bind to the females hormone in weed.
Since the clones have been under 12/12 for a while I think I will wait until next time to CS a plant. 18 weeks of flower + drying + curing is a long time to wait and see if you like the smoke or not
I don’t blame you there.