Yarrow is a vigorous grower. It's recommended that you divide every few years just to keep it looking healthy. It won't die but it may not look as good. You'll just have to see how it looks and play it by ear. Reply
Yarrow is a vigorous grower. It's recommended that you divide every few years just to keep it looking healthy. It won't die but it may not look as good. You'll just have to see how it looks and play it by ear.