Deno’s Garden

Bolboschoenus caldwellii

Genus Bolboschoenus

This source reports 5 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around June 26, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 25, 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: light

about 9 months from start to sowing. Then 14 days to germinate.

95% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Bolboschoenus p. 19Public domain
Show the original text
Bolboschoenus (Cyperaceae). Both species germ. only in 40-70L and none in 70D, 70L, 70 GA-3, or OS. B. caldwellii germ. 40-70L(55% in 2-9 w)-40-70L(45% in 2nd w), 70L-40- 70L(95% in 2nd w), 70D 40-70L(76% in 1-3 w), and 40-70D-40-70L(92% in 1-3 w). T These patterns show that germination in 70L requires a prior 3 m at 40. Other prior treatments such as GA-3 had no effect.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Bolboschoenus p. 19. 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 March 21, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 20, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

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

about 12 months from start to sowing. Then 21 days to germinate.

92% germination in 7–21 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Bolboschoenus p. 19Public domain
Show the original text
Bolboschoenus (Cyperaceae). Both species germ. only in 40-70L and none in 70D, 70L, 70 GA-3, or OS. B. caldwellii germ. 40-70L(55% in 2-9 w)-40-70L(45% in 2nd w), 70L-40- 70L(95% in 2nd w), 70D 40-70L(76% in 1-3 w), and 40-70D-40-70L(92% in 1-3 w). T These patterns show that germination in 70L requires a prior 3 m at 40. Other prior treatments such as GA-3 had no effect.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Bolboschoenus p. 19. 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 Moderate Rated by us, not by the source.

Start around June 19, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 18, 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: light

about 9 months from start to sowing. Then 21 days to germinate.

76% germination in 7–21 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Bolboschoenus p. 19Public domain
Show the original text
Bolboschoenus (Cyperaceae). Both species germ. only in 40-70L and none in 70D, 70L, 70 GA-3, or OS. B. caldwellii germ. 40-70L(55% in 2-9 w)-40-70L(45% in 2nd w), 70L-40- 70L(95% in 2nd w), 70D 40-70L(76% in 1-3 w), and 40-70D-40-70L(92% in 1-3 w). T These patterns show that germination in 70L requires a prior 3 m at 40. Other prior treatments such as GA-3 had no effect.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Bolboschoenus p. 19. 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 High Rated by us, not by the source.

Start around August 6, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 5, 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

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

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

    45 germinated in this phase.

Steps after step 2 run on after germination.

about 6 months from start to sowing. Then 63 days to germinate.

55% germination in 14–63 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Bolboschoenus p. 19Public domain
Show the original text
Bolboschoenus (Cyperaceae). Both species germ. only in 40-70L and none in 70D, 70L, 70 GA-3, or OS. B. caldwellii germ. 40-70L(55% in 2-9 w)-40-70L(45% in 2nd w), 70L-40- 70L(95% in 2nd w), 70D 40-70L(76% in 1-3 w), and 40-70D-40-70L(92% in 1-3 w). T These patterns show that germination in 70L requires a prior 3 m at 40. Other prior treatments such as GA-3 had no effect.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Bolboschoenus p. 19. 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 Very high Rated by us, not by the source.

Start around March 16, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 15, 2024.

  1. Dry storage

    Duration: 1095 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: light

about 3 years from start to sowing. Germination time not stated; 21 days assumed.

2% germination.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Bolboschoenus p. 19Public domain
Show the original text
Bolboschoenus (Cyperaceae). Both species germ. only in 40-70L and none in 70D, 70L, 70 GA-3, or OS. B. caldwellii. Seeds DS 3 y germ. 70L(2/112) and 70D(none).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Bolboschoenus p. 19. 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.