Deno’s Garden

Smyrnium perfoliatum

Genus Smyrnium

This source reports 5 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around July 23, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 22, 2026.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    2/5 germinated in this phase.

Steps after step 2 run on after germination.

about 6 months from start to sowing. Then 77 days to germinate.

40% germination in 77 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Smyrnium p. 78Public domain
Show the original text
Smyrnium (Apiaceae). S. perfoliatum germ. 70L-40(2/5 in 11th w)-70(2/5 in 2nd d), 70D-40(2/5 im 12th w), 40-70(1/6 on 4th d) and none in 70 GA-3 or OT. It is doubtful that the light really had any effect considering that the seeds did not germinate while in light but only after the shift to 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Smyrnium p. 78. 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 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 Light: dark

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

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

40% germination in 84 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Smyrnium p. 78Public domain
Show the original text
Smyrnium (Apiaceae). S. perfoliatum germ. 70L-40(2/5 in 11th w)-70(2/5 in 2nd d), 70D-40(2/5 im 12th w), 40-70(1/6 on 4th d) and none in 70 GA-3 or OT. It is doubtful that the light really had any effect considering that the seeds did not germinate while in light but only after the shift to 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Smyrnium p. 78. 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 High Rated by us, not by the source.

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

  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 4 days to germinate.

17% germination in 4 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Smyrnium p. 78Public domain
Show the original text
Smyrnium (Apiaceae). S. perfoliatum germ. 70L-40(2/5 in 11th w)-70(2/5 in 2nd d), 70D-40(2/5 im 12th w), 40-70(1/6 on 4th d) and none in 70 GA-3 or OT. It is doubtful that the light really had any effect considering that the seeds did not germinate while in light but only after the shift to 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Smyrnium p. 78. 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

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Smyrnium p. 78Public domain
Show the original text
Smyrnium (Apiaceae). S. perfoliatum germ. 70L-40(2/5 in 11th w)-70(2/5 in 2nd d), 70D-40(2/5 im 12th w), 40-70(1/6 on 4th d) and none in 70 GA-3 or OT. It is doubtful that the light really had any effect considering that the seeds did not germinate while in light but only after the shift to 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Smyrnium p. 78. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.

Protocol 5

DerivedN. C. Deno, 1996

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

  1. Sow outdoors and leave it

    Nothing germinated outdoors.

No stated waiting before sowing.

0% germination.

This source doesn't state how long.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Smyrnium p. 78Public domain
Show the original text
Smyrnium (Apiaceae). S. perfoliatum germ. 70L-40(2/5 in 11th w)-70(2/5 in 2nd d), 70D-40(2/5 im 12th w), 40-70(1/6 on 4th d) and none in 70 GA-3 or OT. It is doubtful that the light really had any effect considering that the seeds did not germinate while in light but only after the shift to 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Smyrnium p. 78. 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.