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Anise hyssop
Habit (mature) · Jasper Shide / Wikimedia Commons · CC0 1.0 (public domain dedication)
Limited coverage
Anise hyssop
Agastache foeniculum
An upright, clump-forming perennial of the mint family native to the upper Midwest, Great Plains, and into central Canada, named for its anise-scented foliage. From June through September it carries dense terminal spikes of lavender-to-purple two-lipped flowers above square stems and opposite, toothed leaves. The Lady Bird Johnson Wildflower Center flags it as a nectar source with special value to native bees, bumble bees, and honey bees, and it also draws butterflies and hummingbirds.
Native: 9 US states + 6 CA provinces
Review: Source-backed
Climate fit: moderate (66/100)
Pollinator
Border
Edible
Light
Full sun / Part shade
Water
Moderate water
Mature size
24-48" tall · 18" apart
Hardy in zones
4a-8b
very cold to frosty winters
Summer heat range
Cool-Hot
cool to hot summers Interim Plotwright tier until the plant AHS range is authored.
Native in Illinois
No
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Native across 15 US states and Canadian provinces — a wide-ranging part of North America's plant communities.
Lady Bird Johnson Wildflower Center
Cold hardiness
Now
Zone 6b
USDA
Chicago, IL · 1991-2020 average annual coldest day
Source: USDA Plant Hardiness Zone Map 2023 (1991-2020 climatology) via ArcGIS FeatureServer
Well-suited
2050
Zone 7b
Plotwright
Your zone + climate-model shift · SSP3-7.0 (regional rivalry)
Well-suited
In plain terms: cold winters — coldest nights typically around -3°F.
Well-suited today and still thriving in 2050.
Heat tolerance
Loading current AHS heat-zone and plant heat-fit data at your coordinates…
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Anise hyssop (Agastache foeniculum). Retrieved 2026, June 5, from https://plotwright.garden/plants/anise-hyssop
Sources for every fact
Every fact on this page traces to a source. 18 fields cited18 source-backed.
Missouri Botanical Garden PlantFinder
Botanical research database
Backs 17 fields
Identity
Summary
Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
Habit
Design roles
Seasonal interest
Growth stages
Lifecycle
Regional guidance
Success tips
Designer notes
Wikimedia Commons
Photo · CC0 1.0 public domain dedication
Backs 1 field
Image
Community photos
The photos above are our reviewed reference set, curated for accuracy.
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