Hi
@Amikaro! If those upper leaves are creating shades onto new growth or bud-sites, then you can go ahead and tuck them. Defoliation is highly recommended when some parts of the plant can't get enough light. However, I see your plants don't have a lot of leaves, so do it slightly and remove only 2 leaves at a time. Hope this will help, keep us up-to-date and happy growing 👊