Hey bro! 👋 Defoliation is recommended for very bushy plants that have many large developed leaves blocking light from new growth points and buds. Your case doesn't need defoliation yet; I would recommend continuing to grow and not removing anything from the plant, as your growth points aren't being blocked by leaves. And I recommend switching to bloom already, since your girls are flowering and it would be better for them to be under the influence of the red light spectrum recommended during flowering! 👌😇👍 Good luck, bro!