Image for Giant Hyssop

Giant Hyssop

Scientific name

Agastache foeniculum


The Giant Hyssop is a perennial wildflower species that can grow about 1 m tall. This plant may also be known by the common names Anise Hyssop or Lavender Giant Hyssop. The leaves are dull green, ovate shaped, and have toothed margins. The flowers are small, lavender to purple coloured, have two lipped petals, appear on terminal cylindrical spikes, and bloom between June and September. The flowers are attractive to pollinator species like bees, hummingbirds, and butterflies. Deadhead spent flowers to promote new blooms. The flowers, seeds, and leaves are edible for humans.

Planting conditions

Giant Hyssop grows best in normal to dry conditions with full or partial sun exposure. This plant can grow in moist soils but should be well drained. It can grow in a variety of soil types with a normal pH level. It can tolerate drought and dry soil. This wildflower may be naturally found in prairies, dry upland forests, fields, and dry meadows.


  • Plant height:
    • Max 1.5m
    • Max 2m
    • Max 3m
    • Any
  • Moisture level:
    • Dry
    • Normal
    • Moist
    • Drought Tolerant
  • Light conditions:
    • Full sun
    • Partial sun
  • Soil type:
    • Sandy
    • Loamy
    • Clay
    • Rocky
  • pH:
    • Normal
  • Depth:
    • Wildflower
  • Eco Zone:
    • 3a
    • 3b
    • 4a
    • 4b
    • 5a
    • 5b
  • Plant type:
    • Wildflower
  • Height:
    • 1 m
  • Spread:
    • 0.5 m