Deno’s Garden

Cardiocrinum giganteum

Genus Cardiocrinum

Two sources report 6 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around April 8, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on April 7, 2025.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    5 germinated in this phase.

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  7. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  8. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 2 years from start to sowing. Then 8 days to germinate.

61% germination in 2–8 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cardiocrinum p. 28Public domain
Show the original text
Cardiocrinum (Liliaceae). C. giganteum they wiii ultimately germinate. C. giganteum, further expts. confirm the extended germinations. It is of interest to compare the following two samples which were from the same source and received at the same time, but which must have had different storage conditions in some way before being received on 2-2-1992. One sample germ. 40-70-40-70(2%)-40(93% in 5- 12 w)-70-40-70(1%) and the other germ. 40-70-40-70-40(5%)-70-40-70(61% in 2-8 d). KW has found the same basic behavior.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cardiocrinum p. 28. 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 October 19, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on October 18, 2025.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    2 germinated in this phase.

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  7. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  8. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    1 germinated in this phase.

Steps after step 5 run on after germination.

about 15 months from start to sowing. Then 84 days to germinate.

93% germination in 35–84 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cardiocrinum p. 28Public domain
Show the original text
Cardiocrinum (Liliaceae). C. giganteum they wiii ultimately germinate. C. giganteum, further expts. confirm the extended germinations. It is of interest to compare the following two samples which were from the same source and received at the same time, but which must have had different storage conditions in some way before being received on 2-2-1992. One sample germ. 40-70-40-70(2%)-40(93% in 5- 12 w)-70-40-70(1%) and the other germ. 40-70-40-70-40(5%)-70-40-70(61% in 2-8 d). KW has found the same basic behavior.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cardiocrinum p. 28. 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, 1993

Difficulty Moderate Rated by us, not by the source.

Start around October 26, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on October 25, 2025.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    2 germinated in this phase.

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 15 months from start to sowing. Then 77 days to germinate.

97% germination in 35–77 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cardiocrinum p. 113Public domain
Show the original text
Cardiocrinum (Liliaceae). C. giganteum requires several cycles before germination starts, and only fresh seeds have germ. Germination is epigeal and so far light and GA-3 have stimulated germination. A sample sent from a self sowing colony in British Columbia germ. 40-70-40-70(2% . in 1-7 d)-40(97% in 5-11 w) and 70- 40-70(5%)-40(5%)-70(7%). A sample from New York State germ. 70L-40-70D(25% on 7th d)-40(30%9-12 w) and 70D-40-70D-40(25% in 8th w)-70D(50% in 2nd w). The stems had been cut before frost, the seeds ripened indoors, and the seeds sent to me immediately. Twenty five other samples have been received over the years without a single germination. However, the extended germination pattern had not been appreciated, and it is possible that DS is not tolerated.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cardiocrinum p. 113. 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

Difficulty Very 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. Warm moist stratification

    Duration: 90 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

    5 germinated in this phase.

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    5 germinated in this phase.

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 15 months from start to sowing. Germination time not stated; 21 days assumed.

7% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cardiocrinum p. 113Public domain
Show the original text
Cardiocrinum (Liliaceae). C. giganteum requires several cycles before germination starts, and only fresh seeds have germ. Germination is epigeal and so far light and GA-3 have stimulated germination. A sample sent from a self sowing colony in British Columbia germ. 40-70-40-70(2% . in 1-7 d)-40(97% in 5-11 w) and 70- 40-70(5%)-40(5%)-70(7%). A sample from New York State germ. 70L-40-70D(25% on 7th d)-40(30%9-12 w) and 70D-40-70D-40(25% in 8th w)-70D(50% in 2nd w). The stems had been cut before frost, the seeds ripened indoors, and the seeds sent to me immediately. Twenty five other samples have been received over the years without a single germination. However, the extended germination pattern had not been appreciated, and it is possible that DS is not tolerated.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cardiocrinum p. 113. 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, 1993

Difficulty High 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. 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: dark

    25 germinated in this phase.

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

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

30% germination in 63–84 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cardiocrinum p. 113Public domain
Show the original text
Cardiocrinum (Liliaceae). C. giganteum requires several cycles before germination starts, and only fresh seeds have germ. Germination is epigeal and so far light and GA-3 have stimulated germination. A sample sent from a self sowing colony in British Columbia germ. 40-70-40-70(2% . in 1-7 d)-40(97% in 5-11 w) and 70- 40-70(5%)-40(5%)-70(7%). A sample from New York State germ. 70L-40-70D(25% on 7th d)-40(30%9-12 w) and 70D-40-70D-40(25% in 8th w)-70D(50% in 2nd w). The stems had been cut before frost, the seeds ripened indoors, and the seeds sent to me immediately. Twenty five other samples have been received over the years without a single germination. However, the extended germination pattern had not been appreciated, and it is possible that DS is not tolerated.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cardiocrinum p. 113. 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 6

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around December 28, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 27, 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

    25 germinated in this phase.

  5. Warm moist stratification

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

about 15 months from start to sowing. Then 14 days to germinate.

50% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cardiocrinum p. 113Public domain
Show the original text
Cardiocrinum (Liliaceae). C. giganteum requires several cycles before germination starts, and only fresh seeds have germ. Germination is epigeal and so far light and GA-3 have stimulated germination. A sample sent from a self sowing colony in British Columbia germ. 40-70-40-70(2% . in 1-7 d)-40(97% in 5-11 w) and 70- 40-70(5%)-40(5%)-70(7%). A sample from New York State germ. 70L-40-70D(25% on 7th d)-40(30%9-12 w) and 70D-40-70D-40(25% in 8th w)-70D(50% in 2nd w). The stems had been cut before frost, the seeds ripened indoors, and the seeds sent to me immediately. Twenty five other samples have been received over the years without a single germination. However, the extended germination pattern had not been appreciated, and it is possible that DS is not tolerated.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cardiocrinum p. 113. 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.