Which yarrows will bloom during the Summer months in the Denver Area? I have Moonshine and it only blooms from late May into late June. Is it worth planting achillea ptarmica (Ballerina / Angels Breath) for all Summer bloom? Do these yarrow go by other names (Pearl/Nobelesse?) None of the local nurseries seems to know of 'Ballerina' or 'Angels' Breath.'

I wish I could help you, Blue Garender, but I'm not that advanced in my knowledge.

Good luck in getting your question answered. I'm sure if the right people see this, you'll get the answer you seek. Many brilliant minds here!

Happy Gardening!

What is the difference among the achillea ptarmica Superior, Nana, Boule Neige, and Ballerina?