Adding another complimentary flower with the dipladenia

Question

Do you have a suggestion what to plant with the dipladenia in a whiskey barrel for added color?

Answer 1

You could perhaps find a shade ground cover plant that may fill in the container.

https://www.gardeningknowhow.com/ornamental/vines/mandevilla/growing-a-dipladenia.htm
https://www.gardeningknowhow.com/special/shade/ground-covers-for-shade.htm