hmmm well i have never prunned or lst from a clone, but i know it should be done after a root system has been developed, which could take between a week to two weeks depending on how you are rooting the clone, after that i would say dont prune right away because the stress might be too much for it at an early stage, but im sure lst would be fine after the roots have developed..........might want to check my info , im still new at this also, good luck