Deno’s Garden

Calydorea xiphioides

Genus Calydorea

This source reports 6 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around August 13, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 12, 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

about 6 months from start to sowing. Then 56 days to germinate.

80% germination in 56 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Calydorea p. 21Public domain
Show the original text
Calydorea (Iridaceae). Except for C. xiphioides germ. 70L-40(80% in 8th w) and 70D-40-70D(5/7 in 3-11 d). The two results are not as disparate as might seem since germination of the seeds in 70D- 40-70D was incipient after the 3 m at 40. Nevertheless there does appear to be another example of a delayed light effect. Seeds DS 1 y germ. 70L-40(22% in 2nd w)- 70L(12% on 4th d) and 70D-40(none) confirming the delayed light effect. *
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Calydorea p. 21. 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, 1998

Difficulty Moderate Rated by us, not by the source.

Start around June 29, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 28, 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

about 9 months from start to sowing. Then 11 days to germinate.

71% germination in 3–11 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Calydorea p. 21Public domain
Show the original text
Calydorea (Iridaceae). Except for C. xiphioides germ. 70L-40(80% in 8th w) and 70D-40-70D(5/7 in 3-11 d). The two results are not as disparate as might seem since germination of the seeds in 70D- 40-70D was incipient after the 3 m at 40. Nevertheless there does appear to be another example of a delayed light effect. Seeds DS 1 y germ. 70L-40(22% in 2nd w)- 70L(12% on 4th d) and 70D-40(none) confirming the delayed light effect. *
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Calydorea p. 21. 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, 1998

Difficulty High Rated by us, not by the source.

Start around October 20, 2026 for a May 3 last frost.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    15 germinated in this phase.

  3. Warm moist stratification

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

    15 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 77 days to germinate.

54% germination in 28–77 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Calydorea p. 21Public domain
Show the original text
Calydorea (Iridaceae). Except for C. speciosa germ. 70D(54% in 4-11 w)-40(15% in 8th w)-70D(15% on 3rd d), 70L(none), 40-70D(45% in 2nd w), and 40-70L(4%)-40(7%)-70D(35% in 2-7 d). When the sample in 70L was shifted to 70D after 9 w, 83% germ. in 6-10 d, and 11% more germ. after 3 m in 70D and a shift to 40.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Calydorea p. 21. 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, 1998

Difficulty Moderate Rated by us, not by the source.

Start around September 23, 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 Light: dark

about 6 months from start to sowing. Then 14 days to germinate.

45% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Calydorea p. 21Public domain
Show the original text
Calydorea (Iridaceae). Except for C. speciosa germ. 70D(54% in 4-11 w)-40(15% in 8th w)-70D(15% on 3rd d), 70L(none), 40-70D(45% in 2nd w), and 40-70L(4%)-40(7%)-70D(35% in 2-7 d). When the sample in 70L was shifted to 70D after 9 w, 83% germ. in 6-10 d, and 11% more germ. after 3 m in 70D and a shift to 40.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Calydorea p. 21. 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, 1998

Difficulty High Rated by us, not by the source.

Start around April 4, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on April 3, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

    4 germinated in this phase.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    7 germinated in this phase.

  4. Warm moist stratification

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

about 12 months from start to sowing. Then 7 days to germinate.

35% germination in 2–7 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Calydorea p. 21Public domain
Show the original text
Calydorea (Iridaceae). Except for C. speciosa germ. 70D(54% in 4-11 w)-40(15% in 8th w)-70D(15% on 3rd d), 70L(none), 40-70D(45% in 2nd w), and 40-70L(4%)-40(7%)-70D(35% in 2-7 d). When the sample in 70L was shifted to 70D after 9 w, 83% germ. in 6-10 d, and 11% more germ. after 3 m in 70D and a shift to 40.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Calydorea p. 21. 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, 1998

Difficulty High Rated by us, not by the source.

Start around September 24, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 23, 2025.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°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

    12 germinated in this phase.

Steps after step 3 run on after germination.

about 1.5 years from start to sowing. Then 14 days to germinate.

22% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Calydorea p. 21Public domain
Show the original text
Calydorea (Iridaceae). Except for C. xiphioides germ. 70L-40(80% in 8th w) and 70D-40-70D(5/7 in 3-11 d). The two results are not as disparate as might seem since germination of the seeds in 70D- 40-70D was incipient after the 3 m at 40. Nevertheless there does appear to be another example of a delayed light effect. Seeds DS 1 y germ. 70L-40(22% in 2nd w)- 70L(12% on 4th d) and 70D-40(none) confirming the delayed light effect. *
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Calydorea p. 21. 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.