My Euphorbia is crowded and rootbound, and I’d like to transplant it into this pot. I know the principle of repotting is to only go to the next size. Will it hurt my plant?
It depends on the type of plant. Oftentimes if you know a plant will grow pretty big, like a tree ( and you don’t want to have to repot all the time), then a big pot is fine. Some plants like orchids won’t bloom if in too large a pot. As for your plant it should be fine in that beautiful bigger pot.