Deno’s Garden

Dianella intermedia

Genus Dianella

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

Protocol 1

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around September 29, 2026 for a May 3 last frost.

  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 Light: light

    8 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 98 days to germinate.

40% germination in 84–98 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Dianella p. 29Public domain
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Dianella (Liliaceae). D. intermedia required light and exhibited an unusually long induction period. Seeds germ. 70L(40% in 12-14 w)-40-70L(8%). Germination was not induced by GA-3, and prior periods in 70D or 40 were deleterious and caused germination to be delayed into the 4th and further cycles.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Dianella p. 29. 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 High Rated by us, not by the source.

Start around September 22, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 21, 2025.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°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

  4. Warm moist stratification

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

    3/13 germinated in this phase.

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    1/13 germinated in this phase.

  6. Warm moist stratification

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

  7. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    2/13 germinated in this phase.

Steps after step 6 run on after germination.

about 18 months from start to sowing. Germination time not stated; 21 days assumed.

31% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Dianella p. 38Public domain
Show the original text
Dianella (Uliaceae). D. intermedia germ. 70L(5/13 in 12-14 w)-40- 70L(1/13)-40-70-40(1/13)-70L, 40-70L-40-70L(3/13 in 2-11 d)-40(1/13)-70L(4/13)- 40(2/13), 70D-40-70D-40-70L(6/12 in 8-10 w)-40-70L, and 70 GA-3(none). There are three unüsual features, (a) There is a long induction period in 70L. (b) Prior cycles starting at 70 have little effect, but prior cycles starting at 40 delay germination in 70L. (c) It is unusual to find photostimulation of germination in a member of the Liliaceae.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Dianella p. 38. 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 September 29, 2026 for a May 3 last frost.

  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 Light: light

    1/13 germinated in this phase.

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  6. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    1/13 germinated in this phase.

  7. Warm moist stratification

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

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 98 days to germinate.

38% germination in 84–98 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Dianella p. 38Public domain
Show the original text
Dianella (Uliaceae). D. intermedia germ. 70L(5/13 in 12-14 w)-40- 70L(1/13)-40-70-40(1/13)-70L, 40-70L-40-70L(3/13 in 2-11 d)-40(1/13)-70L(4/13)- 40(2/13), 70D-40-70D-40-70L(6/12 in 8-10 w)-40-70L, and 70 GA-3(none). There are three unüsual features, (a) There is a long induction period in 70L. (b) Prior cycles starting at 70 have little effect, but prior cycles starting at 40 delay germination in 70L. (c) It is unusual to find photostimulation of germination in a member of the Liliaceae.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Dianella p. 38. 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

Difficulty High Rated by us, not by the source.

Start around November 2, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on November 1, 2025.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

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

  6. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  7. Warm moist stratification

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

Steps after step 5 run on after germination.

about 15 months from start to sowing. Then 70 days to germinate.

50% germination in 56–70 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Dianella p. 38Public domain
Show the original text
Dianella (Uliaceae). D. intermedia germ. 70L(5/13 in 12-14 w)-40- 70L(1/13)-40-70-40(1/13)-70L, 40-70L-40-70L(3/13 in 2-11 d)-40(1/13)-70L(4/13)- 40(2/13), 70D-40-70D-40-70L(6/12 in 8-10 w)-40-70L, and 70 GA-3(none). There are three unüsual features, (a) There is a long induction period in 70L. (b) Prior cycles starting at 70 have little effect, but prior cycles starting at 40 delay germination in 70L. (c) It is unusual to find photostimulation of germination in a member of the Liliaceae.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Dianella p. 38. 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.