I bought plants.They are popular and you might be able to find it at your local plant place.Try Romence Gardens.
2 more combos today
This container already has perennials
Biju clematis and Cheaten Heart hosta
Crisp small heuchera
I will add Trailing Black coleus
I also changed this combo the planter has Vagabond clem and will get
Caladium Gingerland and Tr.Black Coleus