Deno’s Garden

Leucojum vernum

Genus Leucojum

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around July 10, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 9, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 6 months from start to sowing. Then 90 days to germinate.

98% germination in 90 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. vernum germ. 70(95% in 3rd m) and 40-70(98% in 3rd m) using my own seed. A sample from J. Gyer in New Jersey gave a much different germination pattern as shown by 70-40(43% in 12th w)-70(3%)-40(6%) and 40-70-40(37% in 12th w)- 70(1%). It is a mystery why one sample germ. predominately at 70 and the other predominately at 40. In either germination, the leaf (hypogeal) does not start to develop until after 3 m at 40. DS for 6 m at 70 or 40 is fatal.
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 Low Rated by us, not by the source.

Start around January 5, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 90 days to germinate.

95% germination in 90 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. vernum germ. 70(95% in 3rd m) and 40-70(98% in 3rd m) using my own seed. A sample from J. Gyer in New Jersey gave a much different germination pattern as shown by 70-40(43% in 12th w)-70(3%)-40(6%) and 40-70-40(37% in 12th w)- 70(1%). It is a mystery why one sample germ. predominately at 70 and the other predominately at 40. In either germination, the leaf (hypogeal) does not start to develop until after 3 m at 40. DS for 6 m at 70 or 40 is fatal.
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 High Rated by us, not by the source.

Start around July 16, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 15, 2026.

  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

    3 germinated in this phase.

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    6 germinated in this phase.

Steps after step 2 run on after germination.

about 6 months from start to sowing. Then 84 days to germinate.

43% germination in 84 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. vernum germ. 70(95% in 3rd m) and 40-70(98% in 3rd m) using my own seed. A sample from J. Gyer in New Jersey gave a much different germination pattern as shown by 70-40(43% in 12th w)-70(3%)-40(6%) and 40-70-40(37% in 12th w)- 70(1%). It is a mystery why one sample germ. predominately at 70 and the other predominately at 40. In either germination, the leaf (hypogeal) does not start to develop until after 3 m at 40. DS for 6 m at 70 or 40 is fatal.
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 4

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

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

    1 germinated in this phase.

Steps after step 3 run on after germination.

about 9 months from start to sowing. Then 84 days to germinate.

37% germination in 84 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. vernum germ. 70(95% in 3rd m) and 40-70(98% in 3rd m) using my own seed. A sample from J. Gyer in New Jersey gave a much different germination pattern as shown by 70-40(43% in 12th w)-70(3%)-40(6%) and 40-70-40(37% in 12th w)- 70(1%). It is a mystery why one sample germ. predominately at 70 and the other predominately at 40. In either germination, the leaf (hypogeal) does not start to develop until after 3 m at 40. DS for 6 m at 70 or 40 is fatal.
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.