Ninebark is a perennial grown for its purple blooms, which open in late spring and return year after year. It's hardy across USDA zones 4 through 10, shrugs off deer and shrugs off dry spells. Its late spring flowers are a moderate draw for honeybees, native bees, and butterflies.
Ninebark — the short answer
Ninebark: grown in zones 4–10, full sun, pH 4.5–6.5.
- USDA zones
- 4–10
- Manual horticultural correction (source not retained); NC State Extension and Missouri Botanical Garden, with the remaining rows from other published sources or Growable Ground compilation
- Soil pH
- 4.5–6.5
- USDA PLANTS
- Sun
- Full Sun
- Growable Ground Plant Database
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.
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What Ninebark is
Ninebark grows as a perennial and reaches around eight feet at maturity. It blooms purple in late spring. It's also deer-resistant.
How to grow Ninebark
Ninebark grows in USDA zones 4 through 10. Ninebark does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.5 to 6.5. It needs a growing season of at least 100 frost-free days and about 500 hours of winter chill, which is why climate matters as much as soil.
USDA Zones
4-10
USDA PHZM 2023
Soil pH
4.5 - 6.5
USDA PLANTS
Sun
Full Sun
Growable Ground plant catalog
Drainage
Data pending
Growable Ground plant catalog
Cold Hardiness
-33°F
The coldest temperature this plant is documented to survive.
USDA PLANTS
Mature Height
8 ft
Growable Ground plant catalog
Chill Hours
500+
Winter hours below ~45°F it needs to fruit — too-mild winters can leave it bloom-shy.
Growable Ground plant catalog
Frost-Free Days
100+
The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.
Growable Ground plant catalog
Start the season right
Plant ninebark in full sun with at least 6 hours of direct sun.
Match the soil
Ninebark prefers pH 4.5 to 6.5 (USDA PLANTS). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.
Water steadily
Keep the root zone evenly moist through establishment. Match watering to the plant's drainage preference and your local rainfall.
Harvest at its peak
Cut ninebark blooms in the cool of the morning, just as they open, for the longest display.
Where Ninebark thrives
Ninebark is hardy across USDA zones 4 through 10. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.
A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 4–10 spans average winter lows from -30°F to 40°F (USDA PHZM 2023). Across the 50 states and DC, that band covers 38 outright and splits 13 more down the middle — and which side of that line your land sits on changes the answer.
Zones 4–10·Where Ninebark growsOpen map →
Where Ninebark stands, state by state
Ninebark is rated for zones 4–10 — a cold floor USDA puts at -30 to -20°F. Across the 50 states and DC, 38 sit fully inside that band, the line runs through 13 more, and 0 sit outside it — and inside every split state, the same line runs on at county grain.
Fully inside zones 4–10
38 states
3 of 38 shown
State zone extents: USDA Plant Hardiness Zone Map (PHZM) 2023. A zone is a 10°F band of average annual extreme minimum temperature, so a state that splits the band contains the boundary — its own page draws the county line, and a parcel report resolves which side your land sits on.
What grows around Ninebark
Growing guides for ninebark
In rotation planning, ninebark counts as a Other — beds recover best when other crops don’t follow each other in the same spot year over year. (Growable Ground derivation — crop-rotation group from botanical family)
Good to know
Good news for pet owners — ninebark isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Ninebark offers moderate value to bees and other pollinators. (Source: Lady Bird Johnson Wildflower Center.)
Your land is one point inside Ninebark's range
This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.
See if Ninebark will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether ninebark actually takes — we score it against the real conditions at your address.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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How we know this about Ninebark
The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.
Grounded inUSDA PLANTS Database•USDA PHZM•ASPCA
Frequently asked questions
Can I grow Ninebark in my zone?
Ninebark grows in USDA hardiness zones 4 through 10 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
When should you plant Ninebark?
Time ninebark to your own season rather than the calendar, leaving enough of the season for its 100-day frost-free need. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Ninebark need?
Ninebark needs full sun — a spot that catches at least 6 hours of direct summer sun a day. In more shade it still grows, but usually gives a smaller, later crop. The catch is that a yard rarely gets even light everywhere — a fence, the house, or one tall tree can quietly take those hours. A Growable Ground report reads the real sun-hours across your land, canopy and buildings included, so you can pick the brightest bed before you plant.
What soil does Ninebark need?
Ninebark prefers soil pH 4.5 to 6.5 (USDA PLANTS). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Ninebark attract pollinators?
Yes — ninebark's flowers are a solid nectar source for honeybees, native bees, and butterflies. (Source: Lady Bird Johnson Wildflower Center.)
Is Ninebark safe for pets?
Ninebark is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)