Prairie Blazing Star is a perennial grown for its purple blooms, which open in mid summer and return year after year. It's hardy across USDA zones 4 through 10. Its mid summer flowers are a real draw for honeybees, native bees, butterflies, and moths.
Zones
4-10
pH Range
6-8.5
Sun
Full Sun
Days to Maturity
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Zone averages can't see the slope, soil, frost, and sun that decide whether prairie blazing star actually takes — and those shift from one yard to the next. Enter your address and we'll score prairie blazing star against your land's real conditions.
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What Prairie Blazing Star is
Prairie Blazing Star grows as a perennial and reaches around four feet at maturity. It blooms purple in mid summer.
How to grow Prairie Blazing Star
Prairie Blazing Star grows in USDA zones 4 through 10. Prairie Blazing Star does best in full sun — at least 6 hours of direct sun a day — and soil from pH 6 to 8.5. It needs a growing season of at least 120 frost-free days, which is why climate matters as much as soil.
USDA Zones
4-10
USDA PHZM 2023
Soil pH
6 - 8.5
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
4 ft
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Frost-Free Days
120+
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Start the season right
Plant prairie blazing star in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Prairie Blazing Star prefers pH 6 to 8.5 (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 prairie blazing star blooms in the cool of the morning, just as they open, for the longest display.
Good to know
Good news for pet owners — prairie blazing star isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Prairie Blazing Star is a standout pollinator plant — high value to bees and other pollinators. (Source: Xerces Society, Pollinator Partnership.)
Where Prairie Blazing Star thrives
Prairie Blazing Star 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 Prairie Blazing Star growsOpen map →
On USDA hardiness-zone overlap, Prairie Blazing Star can grow in these states:
See if Prairie Blazing Star will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether prairie blazing star 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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Frequently Asked Questions
Can I grow Prairie Blazing Star in my zone?
Prairie Blazing Star 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 Prairie Blazing Star?
Most growers plant prairie blazing star after the last spring frost, once the soil has warmed, leaving enough of the season for its 120-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 Prairie Blazing Star need?
Prairie Blazing Star 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 Prairie Blazing Star need?
Prairie Blazing Star prefers soil pH 6 to 8.5 (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Prairie Blazing Star attract pollinators?
Yes — prairie blazing star's flowers are a strong nectar and pollen source for honeybees, native bees, butterflies, and moths (Xerces Society, Pollinator Partnership).
Is Prairie Blazing Star safe for pets?
Prairie Blazing Star is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.