Liatris is a perennial grown for its purple blooms, which open in late summer and return year after year. It's hardy across USDA zones 3 through 9 and shrugs off deer. Its late summer flowers are a real draw for honeybees, native bees, butterflies, and moths.
Zones
3-9
pH Range
5.6-7.5
Sun
Part Sun
Days to Maturity
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Score Liatris on your exact land.
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What Liatris is
Liatris grows as a perennial and reaches around three feet at maturity. It blooms purple in late summer. It's also deer-resistant.
How to grow Liatris
Liatris grows in USDA zones 3 through 9. Liatris does best in part sun — at least 4 hours of direct sun a day — and soil from pH 5.6 to 7.5. It needs a growing season of at least 165 frost-free days, which is why climate matters as much as soil.
USDA Zones
3-9
USDA PHZM 2023
Soil pH
5.6 - 7.5
USDA PLANTS Database
Sun
Part Sun
plant_species_v5.csv
Drainage
Data pending
plant_species_v5.csv
Frost Tolerance
-18°F
plant_species_v5.csv
Mature Height
3 ft
plant_species_v5.csv
Frost-Free Days
165+
plant_species_v5.csv
Start the season right
Plant liatris in part sun with at least 4 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Liatris prefers pH 5.6 to 7.5 (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 liatris blooms in the cool of the morning, just as they open, for the longest display.
Good to know
Good news for pet owners — liatris isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Liatris is a standout pollinator plant — high value to bees and other pollinators. (Source: Xerces Society, Pollinator Partnership.)
Where Liatris thrives
Liatris is hardy across USDA zones 3 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 3–9·Where Liatris growsOpen map →
On USDA hardiness-zone overlap, Liatris can grow in these states:
See if Liatris will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether liatris 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 Liatris in my zone?
Liatris grows in USDA hardiness zones 3 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 Liatris?
Most growers plant liatris after the last spring frost, once the soil has warmed, leaving enough of the season for its 165-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 Liatris need?
Liatris does well in partial sun — around 4 hours of direct sun, and it takes some afternoon shade in stride. That flexibility makes it a good match for a bed the house or a nearby tree shades for part of the day. A Growable Ground report maps how the sun actually falls on your land, hour by hour, so you can set it where the light lines up.
What soil does Liatris need?
Liatris prefers soil pH 5.6 to 7.5 (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Liatris attract pollinators?
Yes — liatris's flowers are a strong nectar and pollen source for honeybees, native bees, butterflies, and moths (Xerces Society, Pollinator Partnership).
Is Liatris safe for pets?
Liatris is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.