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.
Zones
4-10
pH Range
4.5-6.5
Sun
Full Sun
Days to Maturity
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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 Database
Sun
Full Sun
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Drainage
Data pending
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Frost Tolerance
-33°F
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Mature Height
8 ft
plant_species_v5.csv
Chill Hours
500+
plant_species_v5.csv
Frost-Free Days
100+
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Start the season right
Plant ninebark in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Ninebark prefers pH 4.5 to 6.5 (USDA PLANTS Database). 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.
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: Xerces Society, Pollinator Partnership.)
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.
Zones 4–10·Where Ninebark growsOpen map →
On USDA hardiness-zone overlap, Ninebark can grow in these states:
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:
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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?
Most growers plant ninebark after the last spring frost, once the soil has warmed, 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 Database). 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 (Xerces Society, Pollinator Partnership).
Is Ninebark safe for pets?
Ninebark is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.