Swamp Leatherflower
Clematis crispa
Last reviewed: August 2026
Swamp leatherflower is a climbing vine with nodding, bell-shaped blue-purple flowers from March through August. It favors wet woods, ditches, and swamp margins across the southeastern and south-central United States.
Swamp Leatherflower is toxic to dogs and cats.
Listed as toxic by the ASPCA Animal Poison Control Center (opens in new tab) (last reviewed 2026-05-21). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435and your veterinarian's emergency line.
Pollinator Patch flags toxic plants so you can choose a pet-safe native alternative for your yard.
Light
full sun
Water
medium
Size
96"–120" H × 6"–12" W
Bloom
Mar, Apr, May, Jun, Jul, Aug
Native to
AL, AR, FL, GA and 11 more states
Pollinators
butterflies, nectar insects
Before you buy
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Swamp Leatherflower is a native Texas vine that produces distinctive purple, bell-shaped flowers with recurved petals from spring through summer. This climbing perennial grows 8-10 feet tall and works well on trellises, fences, or arbors where it can receive full sun.
Growing Swamp Leatherflower
Grow Swamp Leatherflower in full sun and medium water. Mature plants reach 96 to 120 inches tall and spread 6 to 12 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Swamp Leatherflower takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Requires support structure
- Can appear messy
Wildlife value
The nectar-rich flowers attract butterflies and other beneficial insects throughout the long blooming season. As a native clematis, it provides important food sources for pollinators from March through August.
Common questions
- When does Clematis crispa bloom?
- Swamp leatherflower typically blooms from March through August, producing its distinctive bell-shaped, curled-tip flowers over an extended spring and summer season.
- What kind of light does swamp leatherflower need?
- It grows best in full sun but tolerates part sun and part shade, especially where soil stays consistently moist.
- How much water does this vine require?
- Swamp leatherflower prefers medium to consistently wet soil and grows naturally along swamp edges, ditches, and low woodland areas where moisture is reliable.
- What pollinators visit Clematis crispa flowers?
- Butterflies and other nectar-seeking insects visit the fragrant, drooping flowers of swamp leatherflower for nectar.
- Is swamp leatherflower a climbing plant?
- Yes, it is a vine that climbs by twining its leaf stalks around nearby stems, fences, or shrubs, typically reaching modest heights rather than sprawling extensively.
- Is Swamp Leatherflower toxic to dogs?
- Yes. Swamp Leatherflower is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
- Is Swamp Leatherflower toxic to cats?
- Yes. Swamp Leatherflower is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
- Is Swamp Leatherflower HOA-friendly?
- Swamp Leatherflower takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
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