Bluebeard is a perennial grown for its blue blooms, which open from summer through fall and return year after year. It's hardy across USDA zones 5 through 9, shrugs off deer and grows just as well in a container as in the ground. Its flowers are a real draw for honeybees, native bees, and butterflies.
Zones
5-9
pH Range
5-7.5
Sun
Full Sun
Days to Maturity
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What Bluebeard is
Bluebeard grows as a perennial and reaches around three feet at maturity. It blooms blue from summer through fall. It's also deer-resistant and well suited to containers.
How to grow Bluebeard
Bluebeard grows in USDA zones 5 through 9. Bluebeard does best in full sun — at least 6 hours of direct sun a day — and soil from pH 5 to 7.5, on well-drained ground. It needs a growing season of at least 120 frost-free days and about 200 hours of winter chill, which is why climate matters as much as soil.
USDA Zones
5-9
USDA PHZM 2023
Soil pH
5 - 7.5
USDA PLANTS Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Mature Height
3 ft
Growable Ground plant catalog
Chill Hours
200+
Winter hours below ~45°F it needs to fruit — too-mild winters can leave it bloom-shy.
Growable Ground plant catalog
Frost-Free Days
120+
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 bluebeard in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Bluebeard prefers pH 5 to 7.5 (Growable Ground Plant 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. A 2–3 inch mulch layer holds moisture without waterlogging.
Harvest at its peak
Cut bluebeard blooms in the cool of the morning, just as they open, for the longest display.
Good to know
Good news for pet owners — bluebeard isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Bluebeard is a standout pollinator plant — high value to bees and other pollinators. (Source: Pollinator Partnership.)
Where Bluebeard thrives
Bluebeard is hardy across USDA zones 5 through 9. 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 5–9·Where Bluebeard growsOpen map →
On USDA hardiness-zone overlap, Bluebeard can grow in these states:
See if Bluebeard will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether bluebeard 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 Bluebeard in my zone?
Bluebeard grows in USDA hardiness zones 5 through 9 (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 Bluebeard?
Most growers plant bluebeard 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 Bluebeard need?
Bluebeard 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 Bluebeard need?
Bluebeard prefers soil pH 5 to 7.5, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Bluebeard attract pollinators?
Yes — bluebeard's flowers are a strong nectar and pollen source for honeybees, native bees, and butterflies. (Source: Pollinator Partnership.)
Is Bluebeard safe for pets?
Bluebeard is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)