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Purple Giant Hyssop

Agastache scrophulariifolia

Purple Giant Hyssop is a long-blooming pollinator magnet. Plumes of white to purple flowers persist for several weeks from summer to fall, sustaining native bees, butterflies, and hummingbirds. The crushed leaves smell of anise, and its cylindrical seed heads adorn the winter garden. Purple Giant Hyssop is tall and impressive, but despite its height, it does not tend to flop over. If desired, its growth can be restrained by cutting back in early summer.

Details

Height60” - 72”
Spread24"
Bloom SeasonJuly – October
Soil Types
loamLoam
sandSand
Soil Moisture
mediumMedium
moistMoist
Sun Exposure
partSunPart Sun
fullSunFull Sun

Range Map

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Ecological Benefits

Maintenance Tips

  • As a relative short-lived perennial, consider letting a few seedlings to become established every couple of years to allow this awesome plant to persist in your garden
  • If spread becomes an issue, however you may also need to remove some seedlings before they become established
  • Deadhead spent flowers to prolong bloom time
  • Consider chopping well established Purple Giant Hyssop roughly in half in early summer to reduce overall height and increase bushiness
  • Though rarely required, you may consider staking taller stems of Purple Giant Hyssop to improve their stance

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