I always do two colors of sun coleus (two or three pieces in each pot) plus two colors of sweet potato vines. Keep your coleus and vines trimmed back to encourage branching. A shot of miracle grow every three weeks helps too😁
I usually have tons of coleus pieces in mid summer...would be happy to share some with you for postage if you're interested.
Thanks again for taking time to comment on my photo...I tried lots of plants for my steps, but now I just repeat this look each year with different colors of coleus