hairboy you can flower them right away or wait a month or more. it all depends on the grow space you have, btw, there is no need to "hijack" this thread when you already started one with the same question. the clone will at least double in size from the time you sart 12/12 till harvest. so if you start 12/12 when the plant is 12inches it will be at least 24inches when it finishes

hump, it looks like you burned them a bit, just back off a little on the ferts and they should be fine, burnt tips won't go away, but no more should appear. i saw the same thing with my dwc grow one time after i was away for a few days and the res. evaporated alot so the ppm's were way to high. i changed the water/nutes in the res. and everything was fine. good luck