I know that Agastache is a cousin to Hyssop, but cannot tell you how they are alike. (yet!) I have two of these growing in separate areas, and have killed at least that many others. Supposedly the deer do not like these plants, but my experience tells me otherwise. They may not be as delectable as roses or tulips, but they are not on the hated food list either.
The agastache I am growing now, are definitely babied. They both have a small fence around them to keep marauding varmits at bay. My long-term goal is to get them large enough to be able to survive on their own. At which point only one fence will be removed a year – I will take few chances on these supposedly sturdy perennials.
I like the looks of these flowers a lot, and look forward to including them in cut bouquets as the plants grow and flower more. In the meantime, they are beautifully, distinctive plants in the landscape.