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Dianella intermedia

Turutu

Family AsphodelaceaeGenus Dianella

A clump of long strap-shaped leaves with thin flower stalks rising above, in a bed of round-leaved ground cover by a tree trunk
The whole plantDaderotPublic domain

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
subshrubPlants of the World Online
Flower
Pale violetWikipedia
Native range
Norfolk Is.GBIF Backbone Taxonomy

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

  • Dianella intermedia grows on Lord Howe Island and Norfolk Island. Stephan Endlicher first described it in 1833. Its pale violet flowers are followed by turquoise berries. Wikipedia: Dianella intermedia

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 December 28, 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.

Germination happens during step 1, in 98 days.

40% germination in 84–98 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Dianella p. 29Public domain
Show the original text
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 January 31, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on January 30, 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

  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 12 months from start to step 5. Germination happens during step 5, in 70 days.

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.

Protocol 3

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around December 28, 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.

Germination happens during step 1, in 98 days.

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 December 21, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 20, 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 15 months from start to step 6. Germination happens during step 6; 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.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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