What are the pros? none
What are the cons? extremely invasive roots!
This was not like any yarrow I had grown before. it was extremely wide-spreading, with deep, invasive roots. It was supposed to be a ground covering yarrow, but I never dreamed it would be so hard to get rid of. It was partly my fault, because I started it in my veggie garden, and was supposed to transplant it to a bare spot. I didn't do it right away, waited 2 years. In the second year the plant just took over the 4 ft. square, and was starting to invade the neighboring squares!
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