Deno’s Garden

Pyrus pyrifolia

Genus Pyrus

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around October 20, 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

    1/3 germinated in this phase.

Steps after step 1 run on after germination.

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

67% germination in 63–77 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Pyrus p. 57Public domain
Show the original text
Pyrus (Rosaceae). P. pyrifolia germ. 70D-40(1/3 in 12th w)-70D(1/3 on 3rd d) and 40(2/3 in 9-11 w)- 70D(1/3 on 2nd d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Pyrus p. 57. 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 High Rated by us, not by the source.

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

    1/3 germinated in this phase.

Steps after step 2 run on after germination.

about 6 months from start to sowing. Then 84 days to germinate.

33% germination in 84 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Pyrus p. 57Public domain
Show the original text
Pyrus (Rosaceae). P. pyrifolia germ. 70D-40(1/3 in 12th w)-70D(1/3 on 3rd d) and 40(2/3 in 9-11 w)- 70D(1/3 on 2nd d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Pyrus p. 57. 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.