Deno’s Garden

Leucojum aestivum

Genus Leucojum

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around February 14, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on February 13, 2026.

  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

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    15 germinated in this phase.

Steps after step 4 run on after germination.

about 12 months from start to sowing. Then 56 days to germinate.

75% germination in 28–56 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Leucojum p. 166Public domain
Show the original text
Leucojum (Amaryllldaceae). Germination is hypogeal. L. aestivum germination was erratic and no consistent pattern emerged. Fresh seed germ. 70(20%)-40-70(12%)-40-70(40%) and 40-70-40-70(75% in 4-8 w)- 40(15%). Seed 05 6 m at 70 germ. 70(30% in 4-10 w)-40(8%) and 40(none).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Leucojum p. 166. 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, 1993

Difficulty High Rated by us, not by the source.

Start around December 21, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 20, 2025.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    20 germinated in this phase.

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    12 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

about 15 months from start to sowing. Germination time not stated; 21 days assumed.

40% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Leucojum p. 166Public domain
Show the original text
Leucojum (Amaryllldaceae). Germination is hypogeal. L. aestivum germination was erratic and no consistent pattern emerged. Fresh seed germ. 70(20%)-40-70(12%)-40-70(40%) and 40-70-40-70(75% in 4-8 w)- 40(15%). Seed 05 6 m at 70 germ. 70(30% in 4-10 w)-40(8%) and 40(none).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Leucojum p. 166. 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, 1993

Difficulty Moderate Rated by us, not by the source.

Start around October 27, 2026 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

    8 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 70 days to germinate.

30% germination in 28–70 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Leucojum p. 166Public domain
Show the original text
Leucojum (Amaryllldaceae). Germination is hypogeal. L. aestivum germination was erratic and no consistent pattern emerged. Fresh seed germ. 70(20%)-40-70(12%)-40-70(40%) and 40-70-40-70(75% in 4-8 w)- 40(15%). Seed 05 6 m at 70 germ. 70(30% in 4-10 w)-40(8%) and 40(none).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Leucojum p. 166. 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.