Is Threadleaf Giant Hyssop deer resistant?
Agastache rupestris
Light browsing at worst; rarely ruined.
Not listed by Rutgers NJAES. Rated deer-resistant by El Paso County CSU Extension, whose list is a single category, mapped conservatively to Seldom Severely Damaged.
About Threadleaf Giant Hyssop
Nothing about it is bulky. The leaves are narrow to the point of threadlike, grey-green, no more than two inches long, and they carry a strong liquorice scent that deer generally decline to investigate. It is hardy to zone 5 and still dies over the winter, which confuses people. The cold is not what does it: in wet, heavy soil the crown rots. Sandy or rocky ground with very good drainage, a raised bed or a large pot solves the problem permanently. Digging compost into a clay border to improve it does the opposite. The flowers are burnt orange tubes held in purplish calyces, on spikes ten to twelve inches long, and it blooms right through the summer. Cut off the first flush as it fades and you will usually get a second round in autumn.
Similar to Threadleaf Giant Hyssop
Other perennials with the same deer rating.
- African LilyAgapanthus sp.Zones 8–11, genus rangeSeldom damaged
- AsparagusAsparagus officinalisZones 2–9Seldom damaged
- AsterAster sp.Zones 3–8, genus rangeSeldom damaged
- AstilbeAstilbe x arendsiiZones 3–8Seldom damaged
- Baby's BreathGypsophila sp.Zones 3–9, genus rangeSeldom damaged
- BastardsageEriogonum wrightiiZones 5–10Seldom damaged
Where Threadleaf Giant Hyssop grows
Hardy across most of these 49 states on zone range alone. Mountain and coastal areas sit outside the ranges used here, so check your own zone before ordering.
- Pennsylvania
- New Jersey
- New York
- Connecticut
- Massachusetts
- Virginia
- Maryland
- Michigan
- Wisconsin
- Ohio
- Indiana
- Illinois
- Minnesota
- Missouri
- North Carolina
- Tennessee
- Georgia
- Texas
- Colorado
- California
- Oregon
- Washington
- New Hampshire
- Vermont
- Maine
- Rhode Island
- Delaware
- West Virginia
- Kentucky
- South Carolina
- Florida
- Alabama
- Mississippi
- Louisiana
- Arkansas
- Oklahoma
- Kansas
- Nebraska
- Iowa
- South Dakota
- Montana
- Wyoming
- Idaho
- Utah
- Nevada
- Arizonanative
- New Mexiconative
- Alaska
- District of Columbia
Highlighted states are within its native range according to the USDA PLANTS database, where it is native to 2 US states in total.
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Every list Threadleaf Giant Hyssop belongs to.
Hardy in these zones
Common questions about Threadleaf Giant Hyssop
- Is Threadleaf Giant Hyssop deer resistant?
- Threadleaf Giant Hyssop (Agastache rupestris) is rated Seldom Severely Damaged on the Rutgers NJAES four-tier scale. Light browsing at worst; rarely ruined.
- What hardiness zones does Threadleaf Giant Hyssop grow in?
- Threadleaf Giant Hyssop is hardy in USDA zones 5 to 8. Outside that range it will either not survive winter or will struggle with summer heat.
- Does Threadleaf Giant Hyssop grow in shade?
- No. Threadleaf Giant Hyssop wants full sun and will grow thin and flop in shade.
- How big does Threadleaf Giant Hyssop get?
- Mature height is roughly 36–36 in. Growth rate is moderate.