Deno’s GardenMy Garden

Brimeura amethystina

Pyrenean Bluebell

Family AsparagaceaeGenus Brimeura

Two slender spikes of narrow pale blue bell flowers hanging along one side of each stem
FlowerMeneerke bloemCC BY-SA 4.0

About the plant

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

Habit
bulbous geophytePlants of the World Online
Flower
Pale blueRead from the photograph on this page
Native range
France, SpainGBIF 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.

Worth knowing

  • The amethyst hyacinth is a small bulb of the northern Pyrenees and north-east Spain. A record from the Kapela mountain in Croatia, made by Reichenbach in 1830, was probably a confusion with a Balkan Hyacinthella. Wikipedia: Brimeura amethystina

Two sources report 8 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 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

about 6 months from start to step 3. Germination happens during step 3, in 21 days.

100% germination in 21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Brimeura p. 26Public domain
Show the original text
Brimeura (LHfaceae). B. amethystina optimum conditions can now be completed: 40-70(3%)-40(92% in 5-7 w)-70-40-70-40(5%). B. amethystina alba germ. 70L-40(90% in 4-9 w), 70D-40(20% in 2nd w), 70 GA- 3(10%)-40(15%), 40-70D-40(100% in 3rd w), and 40-70L-40(70% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Brimeura p. 26. 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

Difficulty Moderate Rated by us, not by the source.

Start around August 20, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 19, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    3 germinated in this phase.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  7. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    5 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 49 days.

92% germination in 35–49 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Brimeura p. 26Public domain
Show the original text
Brimeura (LHfaceae). B. amethystina optimum conditions can now be completed: 40-70(3%)-40(92% in 5-7 w)-70-40-70-40(5%). B. amethystina alba germ. 70L-40(90% in 4-9 w), 70D-40(20% in 2nd w), 70 GA- 3(10%)-40(15%), 40-70D-40(100% in 3rd w), and 40-70L-40(70% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Brimeura p. 26. 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 3

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around November 3, 2026 for a May 3 last frost.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 3 months from start to step 2. Germination happens during step 2, in 63 days.

90% germination in 28–63 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Brimeura p. 26Public domain
Show the original text
Brimeura (LHfaceae). B. amethystina optimum conditions can now be completed: 40-70(3%)-40(92% in 5-7 w)-70-40-70-40(5%). B. amethystina alba germ. 70L-40(90% in 4-9 w), 70D-40(20% in 2nd w), 70 GA- 3(10%)-40(15%), 40-70D-40(100% in 3rd w), and 40-70L-40(70% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Brimeura p. 26. 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 4

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 6 months from start to step 3. Germination happens during step 3, in 21 days.

70% germination in 21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Brimeura p. 26Public domain
Show the original text
Brimeura (LHfaceae). B. amethystina optimum conditions can now be completed: 40-70(3%)-40(92% in 5-7 w)-70-40-70-40(5%). B. amethystina alba germ. 70L-40(90% in 4-9 w), 70D-40(20% in 2nd w), 70 GA- 3(10%)-40(15%), 40-70D-40(100% in 3rd w), and 40-70L-40(70% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Brimeura p. 26. 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 5

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around December 22, 2026 for a May 3 last frost.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 3 months from start to step 2. Germination happens during step 2, in 14 days.

20% germination in 14 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Brimeura p. 26Public domain
Show the original text
Brimeura (LHfaceae). B. amethystina optimum conditions can now be completed: 40-70(3%)-40(92% in 5-7 w)-70-40-70-40(5%). B. amethystina alba germ. 70L-40(90% in 4-9 w), 70D-40(20% in 2nd w), 70 GA- 3(10%)-40(15%), 40-70D-40(100% in 3rd w), and 40-70L-40(70% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Brimeura p. 26. 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 6

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around December 15, 2026 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    10 germinated in this phase.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 3 months from start to step 3. Germination happens during step 3; time not stated, 21 days assumed.

15% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Brimeura p. 26Public domain
Show the original text
Brimeura (LHfaceae). B. amethystina optimum conditions can now be completed: 40-70(3%)-40(92% in 5-7 w)-70-40-70-40(5%). B. amethystina alba germ. 70L-40(90% in 4-9 w), 70D-40(20% in 2nd w), 70 GA- 3(10%)-40(15%), 40-70D-40(100% in 3rd w), and 40-70L-40(70% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Brimeura p. 26. 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 7

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around August 20, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 19, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    3 germinated in this phase.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 6 months from start to step 3. Germination happens during step 3, in 49 days.

92% germination in 35–49 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Brimeura p. 108Public domain
Show the original text
Brimeura (Lillaceae). B. amethystina germ. best in 40-70(3%)-40(92% in 5- 7 w) and less in 70(3%)-40-70-40. Starting at 40 is much superior to starting at 70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Brimeura p. 108. 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 8

DerivedN. C. Deno, 1993

Difficulty Very high Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

Steps after step 1 run on after germination.

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

3% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Brimeura p. 108Public domain
Show the original text
Brimeura (Lillaceae). B. amethystina germ. best in 40-70(3%)-40(92% in 5- 7 w) and less in 70(3%)-40-70-40. Starting at 40 is much superior to starting at 70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Brimeura p. 108. 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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