So, I bought these three plants at the same time in the store. They require half shadow (I can check) so I put them in a corner where sun comes only in the morning and not so much the rest of the day.
Big brother as you can see is doing great. The other two, not so much. I planted them at the same time.
Only difference is that the smaller two or more covered by a tree and get a little less sun and perhaps also a little less rainwater because of the tree covering them.
Does anyone have any suggestions on what to do?