Calopo is grown for its foliage and the structure it brings to a planting. It's hardy across USDA zones 10 through 12 and grows just as well in a container as in the ground. Its spring flowers are a modest draw for honeybees.
Zones
10-12
pH Range
4.3-8
Sun
Full Sun
Days to Maturity
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Score Calopo on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether calopo actually takes — and those shift from one yard to the next. Enter your address and we'll score calopo against your land's real conditions.
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What Calopo is
Calopo grows as an annual and reaches around a foot at maturity. It blooms in spring. It's also well suited to containers.
How to grow Calopo
Calopo grows in USDA zones 10 through 12. Calopo does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.3 to 8, on well-drained ground. It needs a growing season of at least 120 frost-free days, which is why climate matters as much as soil.
USDA Zones
10-12
USDA PHZM 2023
Soil pH
4.3 - 8
USDA PLANTS Database
Sun
Full Sun
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Drainage
well (dry spells)
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Frost Tolerance
64.4°F
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Mature Height
1 ft
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Frost-Free Days
120+
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Start the season right
Plant calopo in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Calopo prefers pH 4.3 to 8 (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. A 2–3 inch mulch layer holds moisture without waterlogging.
Keep it in good form
Prune calopo to shape as it grows; the reward is its foliage and structure, not a harvest, so steady upkeep is the whole job.
Good to know
Good news for pet owners — calopo isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Calopo offers low value to bees and other pollinators. (Source: Xerces Society, Pollinator Partnership.)
Where Calopo thrives
Calopo is hardy across USDA zones 10 through 12. 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 10–12·Where Calopo growsOpen map →
On USDA hardiness-zone overlap, Calopo can grow in these states:
See if Calopo will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether calopo 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 Calopo in my zone?
Calopo grows in USDA hardiness zones 10 through 12 (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 Calopo?
Most growers plant calopo 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 Calopo need?
Calopo 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 Calopo need?
Calopo prefers soil pH 4.3 to 8, on well-drained ground (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Calopo attract pollinators?
Yes — calopo's flowers are a modest nectar source for honeybees (Xerces Society, Pollinator Partnership).
Is Calopo safe for pets?
Calopo is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.