Deno’s GardenMy Garden

Bupleurum longifolium

Long-leaved Hare's-ear

Family ApiaceaeGenus Bupleurum

Clusters of tiny yellow-green flowers sitting in shallow cups of broad papery bracts, held out on green spokes.
FlowerRobert Flogaus-FaustCC BY 4.0

About the plant

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

Habit
perennialPlants of the World Online
Flower
BrownRead from the photograph on this page
Native range
Austria, Bulgaria, Czechia-Slovakia, France, Germany, Hungary and elsewhereGBIF Backbone Taxonomy

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; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Two sources report two treatments between them. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around May 8, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on May 7, 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

    12 germinated in this phase.

  3. Warm moist stratification

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

    4 germinated in this phase.

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

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

    8 germinated in this phase.

Steps after step 4 run on after germination.

about 9 months from start to step 4. Germination happens during step 4, in 63 days.

28% germination in 63 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Bupleurum p. 20Public domain
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Bupleurum (Apiaceae). The three species were received in Feb. and presumably had been DS about 6 m. An additional 1 y of DS at 70 was fatal for B. longifolium germ. 70D-40(12% in 11th w)-70D(4%)-40(28% in 9th w)- 70D(8%). Light had little effect. , *
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Bupleurum p. 20. 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, 1996

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Temperature: 40°F 4°C

about 6 months from start to step 2. Germination happens during step 2.

0% germination.

Nothing germinated at 40.

This source doesn't state how long step 2 lasts.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Bupleurum p. 26Public domain
Show the original text
Bupleurum (Apiaceae). B. longifolium DS 6 m germ. 70-40(10% in 9th w)-70(10%)-40(60% 9th w) and none in 40-70-40. Light had no effect.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Bupleurum p. 26. Quoted exactly. Every value on this card comes from this record; 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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