Yes — Strong Match
spirea (zones 5-11) covers every zone Massachusetts contains (5a-7b), so hardiness is not what limits it anywhere in the state.
Your yard isn't the whole zone.
Massachusetts spans zones 5a-7b, 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 spirea against your parcel's actual hardiness, soil, and sun.
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Zone Comparison
Spirea Needs
- USDA Zones: 5-11
- Frost-Free Days: 145+
- Sun: Part Sun
- Mature size: 4 ft tall
- Drought tolerance: Medium
Massachusetts Has
- USDA Zones: 5a-7b
- Last Hard Freeze (28°F): Apr 4 - Apr 14
- First Hard Freeze (28°F): Oct 24 - Nov 14
- Annual Rainfall: 42-50 inches
- Common Soils: Glacial till, Sandy loam, Rocky loam
Plant Zone Range (zones 5-11)
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 Spirea in Massachusetts
The frost window
Across Massachusetts, the last spring hard freeze (28°F) clears between Apr 4 and Apr 14, and the first fall hard freeze lands between Oct 24 and Nov 14 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 193-day window you can count on — up to 224 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
Massachusetts runs as cold as USDA zone 5, and no sourced winter-hardiness floor is on record for spirea, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether spirea is a permanent planting or a replant-every-spring crop for you turns on your own zone within Massachusetts; 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 spirea survives winter here. Whether the season is long enough — and warm enough — is a different question.
Frost-free days
Spirea wants 145+ frost-free days; a typical Massachusetts site sees ~206 (NOAA Regional Climate Centers ACIS, 1991-2020). That leaves comfortable headroom for succession planting.
Chill hours
Spirea requires ~500 chill hours (32-45°F dormancy window). Massachusetts typically banks ~2500 chill hours per winter (from PRISM 1991-2020 climate normals), which keeps this plant on track.
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
Spirea likes near-neutral soil (pH 5-6.8). That's the common-ground band across Massachusetts's glacial till and sandy loam — a soil test confirms it for your site.
Plant pH and drainage requirements from USDA PLANTS Database. Massachusetts soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Spirea in Massachusetts — Quick Answer
- Verdict: Yes — Strong Match
- Plant Zones: 5-11 (USDA PLANTS Database)
- State Zones: 5a-7b (USDA ARS PHZM 2023)
- Growing Season: 28°F hard freezes about Apr 4 - Apr 14 to Oct 24 - Nov 14 (NOAA Regional Climate Centers ACIS, 1991-2020)
What Else to Consider for Spirea in Massachusetts
Zone compatibility tells you about winter cold survival — but Massachusetts growers also need to think about:
Short growing season (120-180 frost-free days) limits warm-season crops
Rocky glacial soils require amendment in many areas
Late spring frosts can damage early plantings through mid-May
Deer pressure is significant in suburban and rural areas
What to actually do about these — and the constraints that apply to every Massachusetts grower, not just spirea — is covered on the Massachusetts growing guide.
Timing shifts within Massachusetts
Spirea needs about 145 days of frost-free season to complete its cycle. Even Berkshire County — Massachusetts’s shortest season at 171 frost-free days — clears that by 26 days, so season length isn’t the constraint anywhere in Massachusetts. What varies is your own parcel.
Across Massachusetts’s 14 counties the frost-free season runs from 171 days in Berkshire County to 246 days in Nantucket County — a spread of 75 days, which is why a single statewide planting date misleads. The median Massachusetts county sees 206 frost-free days, leaving spirea about 61 days of slack on a typical parcel — room for a second sowing where the season runs long.
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"). Spirea's 145-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Where in Massachusetts Fits Best
Even within Massachusetts's zones 5a-7b, county microclimates differ enough to change what thrives. These counties carry the closest zone match for spirea (USDA PHZM 2023):
Pollinator + Wildlife Value
Spirea draws honeybees, native bees, and butterflies (moderate value, Growable Ground Plant Database). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, spirea can only work that bloom inside Massachusetts's frost window — roughly 206 days, opening after the last 28°F freeze (Apr 4 - Apr 14) and closing at the first (Oct 24 - Nov 14), per NOAA Regional Climate Centers ACIS, 1991-2020.
Massachusetts Cooperative Extension
For Massachusetts-specific cultivar recommendations, planting calendars, and pest pressure for spirea, the canonical source is UMass Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Spirea native to Massachusetts?
No — the USDA PLANTS Database lists Spirea as introduced rather than native in the Lower 48, so it is not part of Massachusetts's native flora. It grows here as a garden plant; pairing it with a few Massachusetts natives keeps local pollinators fed too.
Looking for plants that belong here? The Massachusetts 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 Spirea in Massachusetts
When can I plant Spirea in Massachusetts?
Massachusetts's last spring hard freeze (28°F) clears between Apr 4 and Apr 14, and the first fall hard freeze lands between Oct 24 and Nov 14 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Spirea, so this page does not state whether it overwinters in Massachusetts 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 Spirea grown in across Massachusetts?
Massachusetts spans USDA hardiness zones 5a-7b (USDA ARS PHZM 2023). Spirea carries a range of zones 5-11, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Massachusetts site have?
A typical Massachusetts site sees ~206 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Spirea needs 145+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Spirea native to Massachusetts?
No — the USDA PLANTS Database lists Spirea as introduced rather than native in the Lower 48, so it is not part of Massachusetts's native flora. It grows here as a garden plant; pairing it with a few Massachusetts natives keeps local pollinators fed too.
How should I amend the soil for Spirea in Massachusetts?
Spirea prefers pH 5-6.8 (USDA PLANTS). That sits in the common-ground band across Massachusetts soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Spirea actually grow on my specific land in Massachusetts?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores spirea 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 Massachusetts
State-level data is a sketch. Your Growable Ground report scores spirea against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that Massachusetts spirea averages can't show:
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Growing guides for spirea
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