Passionflower is a perennial medicinal herb, long valued for its traditional uses. Notably, it stands up to deer and grows just as well in a container as in the ground. Its summer flowers are a real draw for native bees and butterflies.
Zones
Data not available
pH Range
5.5-7.5
Sun
Full Sun
Days to Maturity
180
Score Passionflower on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether passionflower actually takes — and those shift from one yard to the next. Enter your address and we'll score passionflower against your land's real conditions.
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What Passionflower is
Passionflower grows as a perennial and reaches around eight feet at maturity. It blooms purple in summer. It's also deer-resistant and well suited to containers.
How to grow Passionflower
Passionflower is ready to harvest about 180 days after planting. Passionflower does best in full sun — at least 6 hours of direct sun a day — and soil from pH 5.5 to 7.5, on well-drained ground. It needs around 2,500 growing degree days to mature, which is why climate matters as much as soil.
USDA Zones
Data not available
USDA PHZM 2023
Soil pH
5.5 - 7.5
USDA PLANTS Database
Sun
Full Sun
plant_species_v5.csv
Drainage
well (dry spells)
plant_species_v5.csv
Days to Maturity
180 days
plant_species_v5.csv
GDD Required
2500+
plant_species_v5.csv
Mature Height
8 ft
plant_species_v5.csv
Frost-Free Days
0+
plant_species_v5.csv
Start the season right
Plant passionflower in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Passionflower prefers pH 5.5 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. A 2–3 inch mulch layer holds moisture without waterlogging.
Harvest at its peak
Harvest the part you grow passionflower for — flower, leaf, or root — at its seasonal peak.
Good to know
Good news for pet owners — passionflower isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Passionflower is a standout pollinator plant — high value to bees and other pollinators. (Source: Xerces Society, Pollinator Partnership.)
Where Passionflower thrives
Whether passionflower 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 Passionflower will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether passionflower 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 Passionflower in my zone?
Zone data for passionflower is being finalized. A Growable Ground report checks your parcel's full suitability against federal soil, climate, and zone data.
How long does Passionflower take to grow?
Passionflower is ready to harvest about 180 days after planting (University Extension production guides). Your local frost dates and soil temperature move that window earlier or later.
When should you plant Passionflower?
Most growers plant passionflower 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 Passionflower need?
Passionflower 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 Passionflower need?
Passionflower prefers soil pH 5.5 to 7.5, on well-drained ground (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Passionflower attract pollinators?
Yes — passionflower's flowers are a strong nectar and pollen source for native bees and butterflies (Xerces Society, Pollinator Partnership).
Is Passionflower safe for pets?
Passionflower is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.