Deno’s Garden

Allium siculum

Genus Allium

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around February 7, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on February 6, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°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 12 months from start to sowing. Then 63 days to germinate.

75% germination in 42–63 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nectaroscordum p. 49Public domain
Show the original text
Nectaroscordum (Liliaceae). N. siculum DS 6 m germ. 70D-40(3/4 in 6-9 w), 70L-40(1/3 in 11th w)-70D(2/3 in 4th w), and 40(1/5 in 12th w)-70D-40(2/5 in 7-9 w). A second sample rotted perhaps due to dying in DS.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nectaroscordum p. 49. 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 December 14, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 13, 2025.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°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

    1/3 germinated in this phase.

  4. Warm moist stratification

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

about 15 months from start to sowing. Then 28 days to germinate.

67% germination in 28 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nectaroscordum p. 49Public domain
Show the original text
Nectaroscordum (Liliaceae). N. siculum DS 6 m germ. 70D-40(3/4 in 6-9 w), 70L-40(1/3 in 11th w)-70D(2/3 in 4th w), and 40(1/5 in 12th w)-70D-40(2/5 in 7-9 w). A second sample rotted perhaps due to dying in DS.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nectaroscordum p. 49. 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, 1998

Difficulty High Rated by us, not by the source.

Start around November 9, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on November 8, 2025.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    1/5 germinated in this phase.

  3. Warm moist stratification

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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 15 months from start to sowing. Then 63 days to germinate.

40% germination in 49–63 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nectaroscordum p. 49Public domain
Show the original text
Nectaroscordum (Liliaceae). N. siculum DS 6 m germ. 70D-40(3/4 in 6-9 w), 70L-40(1/3 in 11th w)-70D(2/3 in 4th w), and 40(1/5 in 12th w)-70D-40(2/5 in 7-9 w). A second sample rotted perhaps due to dying in DS.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nectaroscordum p. 49. 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.