Crocosmia is a perennial grown for its orange blooms, which open in summer and return year after year. It's hardy across USDA zones 6 through 9, shrugs off deer and grows just as well in a container as in the ground. Its summer flowers are a moderate draw for hummingbirds and native bees.
Zones
6-9
pH Range
6-7
Sun
Full Sun
Days to Maturity
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What Crocosmia is
Crocosmia grows as a perennial and reaches around 2.5 feet at maturity. It blooms orange in summer. It's also deer-resistant and well suited to containers.
How to grow Crocosmia
Crocosmia grows in USDA zones 6 through 9. Crocosmia does best in full sun — at least 6 hours of direct sun a day — and soil from pH 6 to 7, on well-drained ground.
USDA Zones
6-9
USDA PHZM 2023
Soil pH
6 - 7
USDA PLANTS Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Mature Height
2.5 ft
Growable Ground plant catalog
Start the season right
Plant crocosmia in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Crocosmia prefers pH 6 to 7 (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 crocosmia blooms in the cool of the morning, just as they open, for the longest display.
Good to know
One caution for pet owners — crocosmia is toxic to dogs and cats (mild severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)
Crocosmia offers moderate value to bees and other pollinators. (Source: Pollinator Partnership.)
Where Crocosmia thrives
Crocosmia is hardy across USDA zones 6 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 6–9·Where Crocosmia growsOpen map →
On USDA hardiness-zone overlap, Crocosmia can grow in these states:
See if Crocosmia will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether crocosmia 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 Crocosmia in my zone?
Crocosmia grows in USDA hardiness zones 6 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 Crocosmia?
Most growers plant crocosmia after the last spring frost, once the soil has warmed. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Crocosmia need?
Crocosmia 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 Crocosmia need?
Crocosmia prefers soil pH 6 to 7, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Crocosmia attract pollinators?
Yes — crocosmia's flowers are a solid nectar source for hummingbirds and native bees. (Source: Pollinator Partnership.)
Is Crocosmia safe for pets?
Crocosmia is toxic to pets (dogs,cats) with mild severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)