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Corylopsis pauciflora

Buttercup Winterhazel

Family HamamelidaceaeGenus Corylopsis

Short hanging clusters of pale yellow bell flowers with red-tipped stamens, on bare twigs
FlowerWouter HagensPublic domain

About the plant

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

The plant

Habit
ShrubExtension Gardener Plant Toolbox
Habit
shrubPlants of the World Online
Height
4-6 ft1.2-1.8 mExtension Gardener Plant Toolbox
Spread
4-6 ft1.2-1.8 mExtension Gardener Plant Toolbox
Flower
Cream/Tan, Gold/YellowExtension Gardener Plant Toolbox
Blooms
SpringExtension Gardener Plant Toolbox
Native range
Japan, Korea, TaiwanGBIF Backbone Taxonomy
Hardiness zones
6-8Extension 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, MoistExtension 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; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

  • Pauciflora means "with few flowers", which refers to the small number of flowers in each cluster compared with other winter hazels, not to the total on the plant, which bears masses of pale yellow flowers in early spring. Wikipedia: Corylopsis pauciflora

Protocol

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 9 months from start to step 4. Germination happens during step 4, in 14 days.

20% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Corylopsis p. 125Public domain
Show the original text
Corylopsis (Hamamelldaceae). C. pauciflora germ. 10% in April after DS 6 m at 70 and placing outdoors in May. Fresh seeds germ: 40-70-40-70(1/5 in 2nd w) and none after four cycles starting at 70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Corylopsis p. 125. 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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