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.

Swamp Leatherflower

Name: Pollinator Patch
Author: Pollinator Patch

Clematis crispa

Last reviewed: October 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 (Clematis crispa) — Photo: (c) mfeaver, some rights reserved (CC BY), uploaded by mfeaver

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) 426-4435 and your veterinarian's emergency line.

Pollinator Patch flags toxic plants so you can choose a native alternative that is not on the ASPCA toxic plant list.

Native swaps for a yard with pets

Swamp Leatherflower is listed as toxic to dogs by the ASPCA Animal Poison Control Center. These natives fill a similar role in a planting and are not on the ASPCA toxic plant list for dogs or cats. Each plant's page carries its dated record.

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

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Browse plants for this ecoregion

Western Gulf Coastal Plain South Central Plains Piedmont Middle Atlantic Coastal Plain Southeastern Plains Mississippi Alluvial Plain Mississippi Valley Loess Plains Southern Coastal Plain

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.

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