Such beautiful blooms combined with drought and heat tolerance, this highly reliable perennial groundcover native to the Midwest is a great asset for your well-drained rock garden, hot spot or parking strip. So many blooms over such a long time! The lovely 4” across silky lemon yellow flowers stay open all day and appear May to September here in coastal California. You’ll get tons of them if you add a yearly side-dressing of compost and cut off spent blooms. Beautiful trailing over a rock wall and happy in a container. To 10” tall with trailing stems to 30” long. Cut back severely before Winter.