Hey Wandering Sage, it's mostly a question of genetics actually here s a fes things though : 1) purple genetics dont respond well to genetics as a general principle , but some do like the blackberry. 2) LST should be done as early as possible to give the plant time to veg out. In your case with the zkittles auto, it's a short bushy plant so intuition would have it that it wont respond particulary well to the LST required, especially at this stage. Anyway hope this helps ! 🚀