Deno’s Garden

Allium neapolitanum

Genus Allium

This source reports 5 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Low 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. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Temperature: 40°F 4°C

about 6 months from start to sowing. Then 49 days to germinate.

100% germination in 49 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nothoscordum p. 50Public domain
Show the original text
Nothoscordum (Liliaceae). N. inodorum DS 6 m germ. 70D-40(3/3 in 9th w), 70L-40(2/2 in 8-12 w), and 40(2/2 in 7th w). Seeds DS 1 y germ. 70D(1/10 in 4th w)-40(3/10 in 3rd w) and 40(4/9 in 7th w)-70D.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nothoscordum p. 50. 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 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.

100% germination in 63 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nothoscordum p. 50Public domain
Show the original text
Nothoscordum (Liliaceae). N. inodorum DS 6 m germ. 70D-40(3/3 in 9th w), 70L-40(2/2 in 8-12 w), and 40(2/2 in 7th w). Seeds DS 1 y germ. 70D(1/10 in 4th w)-40(3/10 in 3rd w) and 40(4/9 in 7th w)-70D.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nothoscordum p. 50. 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 Moderate Rated by us, not by the source.

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

  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

about 12 months from start to sowing. Then 84 days to germinate.

100% germination in 56–84 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nothoscordum p. 50Public domain
Show the original text
Nothoscordum (Liliaceae). N. inodorum DS 6 m germ. 70D-40(3/3 in 9th w), 70L-40(2/2 in 8-12 w), and 40(2/2 in 7th w). Seeds DS 1 y germ. 70D(1/10 in 4th w)-40(3/10 in 3rd w) and 40(4/9 in 7th w)-70D.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nothoscordum p. 50. 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, 1998

Difficulty Moderate Rated by us, not by the source.

Start around November 18, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on November 17, 2025.

  1. Dry storage

    Duration: 365 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 Light: dark

Steps after step 2 run on after germination.

about 15 months from start to sowing. Then 49 days to germinate.

44% germination in 49 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nothoscordum p. 50Public domain
Show the original text
Nothoscordum (Liliaceae). N. inodorum DS 6 m germ. 70D-40(3/3 in 9th w), 70L-40(2/2 in 8-12 w), and 40(2/2 in 7th w). Seeds DS 1 y germ. 70D(1/10 in 4th w)-40(3/10 in 3rd w) and 40(4/9 in 7th w)-70D.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nothoscordum p. 50. 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, 1998

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, 2025.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°C

  2. Warm moist stratification

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

    1/10 germinated in this phase.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 1.5 years from start to sowing. Then 21 days to germinate.

30% germination in 21 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nothoscordum p. 50Public domain
Show the original text
Nothoscordum (Liliaceae). N. inodorum DS 6 m germ. 70D-40(3/3 in 9th w), 70L-40(2/2 in 8-12 w), and 40(2/2 in 7th w). Seeds DS 1 y germ. 70D(1/10 in 4th w)-40(3/10 in 3rd w) and 40(4/9 in 7th w)-70D.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nothoscordum p. 50. 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.