Deno’s Garden

Olsynium douglasii

Genus Olsynium

Two sources report 4 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

Start around February 8, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing. Then 56 days to germinate.

70% germination in 56 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Sisyrinchium p. 78Public domain
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Sisyrinchium (Iridaceae). S. inflatum germ. 40(70% in 8th w) and none in 70L or 70D. A prior 3 m in 70D or 70L had no effect on the germination at 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Sisyrinchium 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

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Sisyrinchium p. 78Public domain
Show the original text
Sisyrinchium (Iridaceae). S. inflatum germ. 40(70% in 8th w) and none in 70L or 70D. A prior 3 m in 70D or 70L had no effect on the germination at 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Sisyrinchium p. 78. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.

Protocol 3

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around February 8, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing. Then 56 days to germinate.

70% germination in 56 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Sisyrinchium p. 215Public domain
Show the original text
Sisyrinchium (lridaceae). Light and outdoor conditions should be tried. S. inflatum germ. 40(70% in 8th w) and none in 70D or 70L.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Sisyrinchium p. 215. 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

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Sisyrinchium p. 215Public domain
Show the original text
Sisyrinchium (lridaceae). Light and outdoor conditions should be tried. S. inflatum germ. 40(70% in 8th w) and none in 70D or 70L.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Sisyrinchium p. 215. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.