Conditional — Some Areas
firebush (zones 9-10) reaches only part of New Mexico (5a-9a): zone 9 are in range, so where you are in the state decides it.
Your yard isn't the whole zone.
New Mexico spans zones 5a-9a, but your yard sits in exactly one — and slope, tree cover, and cold-air pockets nudge it further. Enter your address and we'll score firebush against your parcel's actual hardiness, soil, and sun.
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Zone Comparison
Firebush Needs
- USDA Zones: 9-10
- Frost-Free Days: 300+
- Sun: Full Sun
- Mature size: 15 ft tall
- Drought tolerance: Medium
New Mexico Has
- USDA Zones: 5a-9a
- Last Hard Freeze (28°F): Mar 31 - Apr 19
- First Hard Freeze (28°F): Oct 22 - Nov 9
- Annual Rainfall: 8-20 inches
- Common Soils: Sandy loam, Caliche, Adobe clay
Plant Zone Range (zones 9-10)
Preferred Soil pH
Plant data: USDA PLANTS Database / Growable Ground plant catalog. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Firebush in New Mexico
The frost window
Across New Mexico, the last spring hard freeze (28°F) clears between Mar 31 and Apr 19, and the first fall hard freeze lands between Oct 22 and Nov 9 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 186-day window you can count on — up to 223 days on a mild site in a kind year. That marks the hard freeze, not the last light frost, so tender transplants usually wait another 2-3 weeks.
Winter standing
New Mexico runs as cold as USDA zone 5, and no sourced winter-hardiness floor is on record for firebush, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether firebush is a permanent planting or a replant-every-spring crop for you turns on your own zone within New Mexico; check its hardiness range against that before treating it as long-lived ground.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: USDA PLANTS Database. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Growing Season Fit
The zone check says firebush survives winter in part of New Mexico, not across all of it. Whether the season is long enough — and warm enough — is a different question.
Frost-free days
Firebush wants 300+ frost-free days; a typical New Mexico site sees ~209 (NOAA Regional Climate Centers ACIS, 1991-2020) — 91 days short of what it needs. A typical New Mexico season does not carry this crop to harvest outdoors, and a gap that size is not one an earlier sowing date or a faster cultivar closes; growing it here means growing it under cover.
GDD and chill-hour figures are computed from PRISM 1991-2020 monthly climate normals; frost-free days from NOAA Regional Climate Centers ACIS, 1991-2020. Each is the state median across its counties (P25/P75 span the within-state spread). Hardiness-zone range is USDA PHZM 2023.
Soil + Drainage Fit
Firebush likes near-neutral soil (pH 5.5-7.5). That's the common-ground band across New Mexico's sandy loam and caliche — a soil test confirms it for your site. It will grow across that whole span, but it does best between pH 6 and 7 — worth knowing before you decide whether a New Mexico soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your New Mexico site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Plant pH and drainage requirements from USDA PLANTS Database. New Mexico soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Firebush in New Mexico — Quick Answer
- Verdict: Conditional — Some Areas
- Plant Zones: 9-10 (USDA PLANTS Database)
- State Zones: 5a-9a (USDA ARS PHZM 2023)
- Growing Season: 28°F hard freezes about Mar 31 - Apr 19 to Oct 22 - Nov 9 (NOAA Regional Climate Centers ACIS, 1991-2020)
What Else to Consider for Firebush in New Mexico
Zone compatibility tells you about winter cold survival — but New Mexico growers also need to think about:
Very low rainfall requires irrigation for most crops
High altitude UV intensity can burn tender transplants
Alkaline soils limit plant selection without amendment
What to actually do about these — and the constraints that apply to every New Mexico grower, not just firebush — is covered on the New Mexico growing guide.
Timing shifts within New Mexico
Firebush needs about 300 days of frost-free season to complete its cycle. No New Mexico county gives it that outdoors: even Doña Ana County, the state’s longest season at 264 frost-free days, falls 36 days short — so it needs transplants, a short-season variety, or covered growing.
Across New Mexico’s 33 counties the frost-free season runs from 144 days in Catron County to 264 days in Doña Ana County — a spread of 120 days, which is why a single statewide planting date misleads. The median New Mexico county sees 209 frost-free days, which is 91 days short of what firebush needs — so on a typical New Mexico parcel this is a transplant-or-protect crop, not a direct-sow one.
County last-freeze dates and frost-free day counts: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F freeze (earlier than the folk 32°F "last frost"). Firebush's 300-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Firebush draws honeybees, native bees, butterflies, and hummingbirds (high value, Growable Ground Plant Database). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, firebush can only work that bloom inside New Mexico's frost window — roughly 209 days, opening after the last 28°F freeze (Mar 31 - Apr 19) and closing at the first (Oct 22 - Nov 9), per NOAA Regional Climate Centers ACIS, 1991-2020.
New Mexico Cooperative Extension
For New Mexico-specific cultivar recommendations, planting calendars, and pest pressure for firebush, the canonical source is NMSU Cooperative Extension Service. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Firebush native to New Mexico?
Firebush is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-07-01) does not document a native range in New Mexico. It can still earn a place in a New Mexico garden — the zone comparison above tells you whether it will thrive.
Looking for plants that belong here? The New Mexico growing guide lists USDA-documented natives for the state.
Native-range data: USDA PLANTS Database state-distribution records, accessed 2026-07-01.
Common Questions About Growing Firebush in New Mexico
When can I plant Firebush in New Mexico?
New Mexico's last spring hard freeze (28°F) clears between Mar 31 and Apr 19, and the first fall hard freeze lands between Oct 22 and Nov 9 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Firebush, so this page does not state whether it overwinters in New Mexico and publishes no fall establishment date for it — check its hardiness range against your own zone before treating it as a permanent planting.
What hardiness zone is Firebush grown in across New Mexico?
New Mexico spans USDA hardiness zones 5a-9a (USDA ARS PHZM 2023). Firebush carries a range of zones 9-10, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical New Mexico site have?
A typical New Mexico site sees ~209 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Firebush needs 300+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Firebush native to New Mexico?
Firebush is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-07-01) does not document a native range in New Mexico. It can still earn a place in a New Mexico garden — the zone comparison above tells you whether it will thrive.
How should I amend the soil for Firebush in New Mexico?
Firebush prefers pH 5.5-7.5 and well (dry spells) drainage (Growable Ground Plant Database). That sits in the common-ground band across New Mexico soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Firebush actually grow on my specific land in New Mexico?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores firebush against your address's exact soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in New Mexico
State-level data is a sketch. Your Growable Ground report scores firebush against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that New Mexico firebush averages can't show:
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Growing guides for firebush
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