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Euonymus phellomanus

Corktree

Family CelastraceaeGenus Euonymus

Green stems carrying tall corky ridges along their length, among pale green oval leaves
BarkKrzysztof Ziarnek, KenraizCC BY-SA 4.0

About the plant

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

Habit
shrubPlants of the World Online
Habit
Perennial, ShrubPLANTS Database
Flower
Greenish whiteFlora of China

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

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; PLANTS Database — USDA NRCS; Flora of China — Wu Zhengyi, Peter H. Raven and Hong Deyuan (eds.).

Worth knowing

  • Corky spindle's bark grows rough corky "wings" along each branch as it ages, and phellos in its name is the Ancient Greek for cork. Its brilliant pink autumn fruit split open to show bright orange seeds. Wikipedia: Euonymus phellomanus

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around July 23, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 22, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    1/8 germinated in this phase.

Steps after step 3 run on after germination.

about 6 months from start to step 3. Germination happens during step 3, in 77 days.

12% germination in 77 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Euonymus p. 33Public domain
Show the original text
Euonymus (Celastraceae). E. phellomanus germ. 70D-40-70D(1/8 in 2nd w) and 40-70D-40(1/8 in 11th w)- 70D-40(1/8 in 10th w). The seedlings rotted suggesting that the seeds had deteriorated in the unknown duration of DS. GA-3 did not initiate germination.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Euonymus p. 33. 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.

Protocol 2

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around September 24, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 23, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

about 6 months from start to step 3. Germination happens during step 3, in 14 days.

12% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Euonymus p. 33Public domain
Show the original text
Euonymus (Celastraceae). E. phellomanus germ. 70D-40-70D(1/8 in 2nd w) and 40-70D-40(1/8 in 11th w)- 70D-40(1/8 in 10th w). The seedlings rotted suggesting that the seeds had deteriorated in the unknown duration of DS. GA-3 did not initiate germination.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Euonymus p. 33. 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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