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Clematis crispa

Swamp Leather Flower · Blue-jasmine · Curly Clematis

Family RanunculaceaeGenus Clematis

A single nodding, urn-shaped lavender flower with curled-back tips, on a vine in open woodland
FlowerKaren GuinCC BY 4.0
A painted plate of a vine bearing one wide-open violet flower and one nodding purple bell, with curling leaf stalks, captioned Blue Jasmine
IllustrationMary Vaux WalcottPublic domain

About the plant

What it is and where it grows — not part of any germination protocol.

The plant

Habit
Ground Cover, Herbaceous Perennial, Perennial, VineExtension Gardener Plant Toolbox
Habit
climbing shrubPlants of the World Online
Height
6-10 ft1.8-3 mExtension Gardener Plant Toolbox
Spread
3-6 ft0.9-1.8 mExtension Gardener Plant Toolbox
Flower
Blue, Pink, Purple/Lavender, WhiteExtension Gardener Plant Toolbox
Blooms
Spring, SummerExtension Gardener Plant Toolbox
Native range
Native to the lower 48 statesPLANTS Database
Hardiness zones
6-9Extension Gardener Plant Toolbox

Growing conditions

Sun
Full sun; Partial ShadeExtension Gardener Plant Toolbox
Soil
Clay, High Organic Matter, Loam (Silt), SandExtension Gardener Plant Toolbox
Soil pH
Acid (<6.0)Extension Gardener Plant Toolbox
Moisture
Good Drainage, Moist, Occasionally WetExtension Gardener Plant Toolbox

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Extension Gardener Plant Toolbox — NC State Extension; Plants of the World Online — Royal Botanic Gardens, Kew; PLANTS Database — USDA NRCS.

Worth knowing

Protocol

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

  1. Cold moist stratification

    Temperature: 40°F 4°C

Germination happens during step 1; time not stated, 21 days assumed.

50% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Clematis p. 119Public domain
Show the original text
Clematis (Ranunculaceae). Light and/or GA-3 are required for the germination of some species. Although a number of species germ. significantly in the dark, light and GA-3 needs to be tried on all species. Multicycle patterns were common and some species germ. largely at 40. The seeds of all species are designed to be dispersed by wind so that it was presumed that DS would be tolerated. This was supported by the data for seeds DS 6 m, however seeds of C. crispa germ. 1/2 at 40 in the 5th cycle starting at 40. Six seeds sown at 70 all rotted.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Clematis p. 119. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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