United States / Grow / blue giant hyssop

blue giant hyssop (Agastache foeniculum)
Photo: (c) Liren Varghese, some rights reserved (CC BY) (CC BY), via iNaturalist. Species-typical, not necessarily this cultivar.

blue giant hyssop

Agastache foeniculum · Lamiaceae · Wikipedia

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Is this one for your yard?

Enter your ZIP to see whether this is legal to plant in your state, and whether it survives your winter.

Agastache foeniculum has native and introduced range captured in range evidence. On the evidence table, the record remains on-list, with its fire pack marked limited evidence.

The three selections describe distribution, computed direction, and source depth without merging them. The related plants section permits comparison, but it does not add evidence to foeniculum or change either cited range category. A second visit to the accepted rows keeps the listing inspectable while the range route documents its own split. This separation also prevents the limited-depth notice from being read as a distribution judgment.

Form
perennial
Light
Sun to shade
Water need
low
Rated in
northeastern Minnesota
On this lot

1. Fire evidence and conditions

Fire evidence
Fire-resistant — location does not change the cited classification.
Placement evidence
1 source placement record; source schemes remain separate.
Evidence regions
northeastern Minnesota
Typed publication scope: 1 scope across 1 cited fire source

2. Why this plant is relevant here

State distribution
Documented in CO, CT, DE, IA, IL, KY, MI, MN, MT, ND, NE, NH, NJ, NY, PA, SD, WA, WI, WY.
Native range
Current cited native range in CO, IA, ID, IL, MN, MT, ND, NE, SD, WA, WI, WY.
Introduced / established
6 sourced range or established records. This is not an invasive warning.
USDA hardiness
Documented range 4–8.

3. Legal, ecological, and broader status

How to read this page

The status above is computed from the cited rows below: independent recommendations can support a fire-resistant result, an avoid row can produce keep-away, and disagreement stays visible as conflict. Placement notes preserve each source’s own scheme rather than translating unlike rules into one scale. This is evidence about a plant, not permission to plant it in every part of the defensible space; Zone 0 remains noncombustible.

Native and introduced range evidence

These are exact U.S. botanical-area records from the cited range source. Native and introduced describe biogeographic relationship, not fire performance or planting approval. Doubtful and extinct rows stay visible but do not count as current presence.

Current native

12

exact source areas

Current introduced

6

exact source areas

Qualified

0

doubtful or extinct source rows

12 native source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • Colorado (CO)
  • Iowa (IA)
  • Idaho (ID)
  • Illinois (IL)
  • Minnesota (MN)
  • Montana (MT)
  • North Dakota (ND)
  • Nebraska (NE)
  • South Dakota (SD)
  • Washington (WA)
  • Wisconsin (WI)
  • Wyoming (WY)
6 introduced source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • Connecticut (CT)
  • Delaware (DE)
  • Kentucky (KY)
  • New Hampshire (NH)
  • New York (NY)
  • Pennsylvania (PA)

The lossless worldwide derivative is retained once in the research corpus; object pages repeat only exact U.S. areas needed by the local lens. The JSON twin carries the same page assertions.

Plant hardiness evidence

These values describe the plant source. Your ZIP zone comes from the separate 2023 USDA Plant Hardiness Zone Map. Whole-zone values stay whole-zone, and a single unresolved value is not treated as a tolerance range. Different source boundaries stay separate: overlapping statements are compared independently, while only ranges with no shared zone are called a conflict.

Where its sources say to plant it

Placement rules below use each source's own distances or named zones, tied to its rating. They are not interchangeable with the directory's current Zone 0 guidance.

The evidence

Grouped by what each source concluded. Primary evidence rated the plant itself (a lab, field program, or original curation); corroboration compiled or republished another source's rating and resolves to its root lineage.

Recommends (1)

Last verified 2026-08-23. JSON (CC BY 4.0)

Profiles: USDA PLANTS · GBIF · iNaturalist · Wikidata · Wikipedia · ITIS

Agastache foeniculum (Blue Giant Hyssop). FireApproved. https://fireapproved.com/plants/agastache-foeniculum/. Last verified 2026-08-23.