5. Anise Hyssop (Agastache foeniculum or A. rugosa, aka Korean mint) Perennial, summer-blooming anise hyssop has fuzzy purple or violet flower spikes on 2 to 3 foot high plants with licorice-scented leaves. The nectar-rich flowers are very attractive to both butterflies and pest-eating beneficial insects. Anise hyssop is hardy in zones 6-9; Korean mint in zones 5-8.
Photo: (cc) Anna/Flickr
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