Pentas is an annual grown for its blooms, which open in summer. Notably, it shrugs off deer and grows just as well in a container as in the ground. Its summer flowers are a real draw for honeybees, native bees, butterflies, and hummingbirds.
Zones
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pH Range
6-7.5
Sun
Full Sun
Days to Maturity
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Score Pentas on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether pentas actually takes — and those shift from one yard to the next. Enter your address and we'll score pentas against your land's real conditions.
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What Pentas is
Pentas grows as an annual and reaches around two feet at maturity. It blooms in summer. It's also deer-resistant and well suited to containers.
How to grow Pentas
Pentas does best in full sun — at least 6 hours of direct sun a day — and soil from pH 6 to 7.5, on well-drained ground.
USDA Zones
Data pending
Soil pH
6 - 7.5
USDA PLANTS Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Mature Height
2 ft
Growable Ground plant catalog
Frost-Free Days
0+
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 pentas in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Pentas prefers pH 6 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 pentas blooms in the cool of the morning, just as they open, for the longest display.
Good to know
Good news for pet owners — pentas isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Pentas is a standout pollinator plant — high value to bees and other pollinators. (Source: Pollinator Partnership.)
Where Pentas thrives
Whether pentas thrives on a given site comes down to its soil pH, drainage, sun, and frost dates — the conditions that vary parcel to parcel.
See if Pentas will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether pentas 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 Pentas in my zone?
Zone data for pentas is being finalized. A Growable Ground report checks your parcel's full suitability against federal soil, climate, and zone data.
When should you plant Pentas?
Most growers plant pentas 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 Pentas need?
Pentas 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 Pentas need?
Pentas prefers soil pH 6 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 Pentas attract pollinators?
Yes — pentas's flowers are a strong nectar and pollen source for honeybees, native bees, butterflies, and hummingbirds. (Source: Pollinator Partnership.)
Is Pentas safe for pets?
Pentas is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)