Deno’s Garden

Parthenocissus quinquefolia

Genus Parthenocissus

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty High 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. Clean the flesh off the seed

  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

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

13% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Parthenocissus p. 187Public domain
Show the original text
Parthenocissus (Vitaceae). P. quinquifolia seed was collected in October. After WC the 25% empty seed coats float and were discarded. Fresh seed germ. 70-40-70(3/23 in 2nd w) and 40- 70(2/28 in 1-4 w)-40-70. The berries hang on all winter showing that DS is tolerated.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Parthenocissus p. 187. 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, 1993

Difficulty Very high Rated by us, not by the source.

Start around September 10, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 9, 2026.

  1. Clean the flesh off the seed

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

Steps after step 3 run on after germination.

about 6 months from start to sowing. Then 28 days to germinate.

7% germination in 7–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Parthenocissus p. 187Public domain
Show the original text
Parthenocissus (Vitaceae). P. quinquifolia seed was collected in October. After WC the 25% empty seed coats float and were discarded. Fresh seed germ. 70-40-70(3/23 in 2nd w) and 40- 70(2/28 in 1-4 w)-40-70. The berries hang on all winter showing that DS is tolerated.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Parthenocissus p. 187. 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.