Sweet Autumn Clematis is a tree, a long-term addition to the landscape. It's hardy across USDA zones 5 through 9 and shrugs off deer. Its late summer flowers are a moderate draw for honeybees and native bees.
Zones
5-9
pH Range
5.5-7.5
Sun
Full Sun
Days to Maturity
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Zone averages can't see the slope, soil, frost, and sun that decide whether sweet autumn clematis actually takes — and those shift from one yard to the next. Enter your address and we'll score sweet autumn clematis against your land's real conditions.
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What Sweet Autumn Clematis is
Sweet Autumn Clematis grows as a perennial and reaches around 25 feet at maturity. It blooms white in late summer. It's also deer-resistant.
How to grow Sweet Autumn Clematis
Sweet Autumn Clematis grows in USDA zones 5 through 9. Sweet Autumn Clematis 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 2,000 growing degree days to mature and a growing season of at least 150 frost-free days, which is why climate matters as much as soil.
USDA Zones
5-9
USDA PHZM 2023
Soil pH
5.5 - 7.5
USDA PLANTS Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
GDD Required
2000+
Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.
Growable Ground plant catalog
Mature Height
25 ft
Growable Ground plant catalog
Frost-Free Days
150+
The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.
Growable Ground plant catalog
Plant it right
Set sweet autumn clematis in full sun with well-drained soil. Many fruit trees need a second variety nearby to pollinate — check before you plant just one.
Match the soil
Sweet Autumn Clematis prefers pH 5.5 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.
Be patient, then harvest
Prune annually while the tree establishes; fruit trees reward patience with years of harvest. Local Extension guides publish per-cultivar bearing-age tables.
Good to know
One caution for pet owners — sweet autumn clematis 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.)
Sweet Autumn Clematis offers moderate value to bees and other pollinators. (Source: Pollinator Partnership.)
Where Sweet Autumn Clematis thrives
Sweet Autumn Clematis is hardy across USDA zones 5 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 5–9·Where Sweet Autumn Clematis growsOpen map →
On USDA hardiness-zone overlap, Sweet Autumn Clematis can grow in these states:
See if Sweet Autumn Clematis will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether sweet autumn clematis 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 Sweet Autumn Clematis in my zone?
Sweet Autumn Clematis grows in USDA hardiness zones 5 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 Sweet Autumn Clematis?
Set sweet autumn clematis out in early spring or fall while it's dormant, so the roots establish before the heat of summer. Your local last-frost date — which a Growable Ground report pulls for your exact address — sets the precise window.
How much sun does Sweet Autumn Clematis need?
Sweet Autumn Clematis 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 Sweet Autumn Clematis need?
Sweet Autumn Clematis prefers soil pH 5.5 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 Sweet Autumn Clematis attract pollinators?
Yes — sweet autumn clematis's flowers are a solid nectar source for honeybees and native bees. (Source: Pollinator Partnership.)
Is Sweet Autumn Clematis safe for pets?
Sweet Autumn Clematis 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.)