Q.What Plants Are Good For A Tall Pot That Will Provide Blooms Or Color Year Round?
I have two tall (24”) thin (12”) pots that flank a fountain. I tried dinner plate dahlias but they died. I have Cana one but now they have no blooms and just look like stalks. The other has a mandevilla that is no longer blooming. What combination of plants (thriller, spiller and filler) will provide blooms and color all year? I am in zone 10b.

Certified GKH Gardening Expert
You have many options available to you! Here are some articles to help you to get started:
https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-9-10-11/plants-zones-9-11.htm
https://www.gardeningknowhow.com/ornamental/flowers/fgen/companion-planting-with-flowers.htm