So last year, I planted a cultivar of Agastache foeniculum, called “Snow Spike.” It has white flowers. Pollinators like it. (A. foeniculum, for the record, is our native giant blue hyssop, growing up to five feet tall.)
I have looked through various grower information, and it’s either 18″, 24″, 36″ or 40″ tall, depending on who you ask, lauded for
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