Image of Agastache nepetoides
Source: Donna Bos
image of Flowering plant
Agastache nepetoides
Yellow Giant Hyssop
Agastache faux-népéta

Obsolete Names

catnip giant-hyssop
agastache faux-népète
No seeds available for this plant.
We currently accept seeds for this plant
Bloom colour: White Bloom period: Jun - Sep
Max Height: 6.0 feet
Max Width: 2.0 feet (spreads by rhizome)
Light condition:
Full sun More than 6 hours of direct sun a day
Part shade More than 2 or 3 hours but less than 6 hours of direct sun a day
Soil conditions:
Moisture medium Tolerates medium soil condition
Lifespan: Perennial plants that will that come back year after year
Gardener Experience:
beginner friendly Suitable for beginner gardeners
plant germinate easy Easy to germinate
plant self seeding Self-seeding
Landscape uses:
container suitable Suitable for container garden
school garden Suitable for school gardens
Ecological Benefits:
Hummingbird friendly Supports hummingbirds
Bird friendly Supports birds
butterfly host Butterfly host
Tolerates:
drought Tolerant Tolerates drought conditions
Deer Resistant Deer resistant
rabbit resistant Rabbit resistant
limestone Tolerant Tolerates limestone conditions
transplantation Tolerant Tolerates transplantation
Special Features and Considerations:
septic tank safe This plant is septic tank safe

Plant Location

Native to Ottawa region: No

Distribution according to VASCAN

Distribution: Agastache nepetoides
Ephemeral Native Introduced Excluded Extirpated Doubtful Absent
View taxonomy on Canadensys

View on iNaturalist

Thrives in Ecozones

  • Boreal Plains
  • Mixed Wood Plains

Ecological Benefits

Butterflies Supported by Agastache nepetoides

No butterfly data available for this plant.

Specialized Bees Supported by Agastache nepetoides

No bee data available for this plant.

Plants that grow in similar conditions, that bloom at the same time.

Complementary Plants

Substitute For Non-Native Plants

  • Perovskia Atriplicifolia (Russian Sage)
  • Lupinus (Non-Native Lupins)
  • Ajuga reptans (Bugleweed)
  • Buddleia (Butterfly Bush)
  • Delphinium (Delphinium)
  • Salvia (Non-Native Sage)
  • Lavandula) (Lavender)

Sowing Information

Download Sowing Label (PDF)
  • Sowing depth: Surface sow
  • Sow by February
  • Stratification duration: 60 days
  • Self-seeding

Harvesting and Seed Sharing

  • Harvest start month: October
  • Harvesting indicator: Pods are brown and crisp and starting to open, seeds are dark and tiny stem attaching to the main stem is brown. Seeds easily fall off pod when shaken, and little stem connecting the pod to the main stem is brown (not green)
  • Harvesting mean: Put pods in food processor or blender and blend seeds, and strain seeds using a strainer
  • Seed viability test: No test needed before donating
  • Packaging measure: Half of one, 1/32 teaspoon
  • Seed storage: Air dry in paper bag or open container, for a few days until crisp, shaking seeds to move them once in a while to prevent molding
  • At least one cultivar: No, you can donate without knowing the source as there are only straight species
  • No harvesting video available at this time.

Toxicity Notes

Can cause cats indigestion.