Deno’s Garden

Clematis lanuginosa

Genus Clematis

This source reports 6 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate 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. Dry storage

    Duration: 180 daysTemperature: 70°F 21°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

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

95% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Clematis p. 119Public domain
Show the original text
Clematis (Ranunculaceae). Light and/or GA-3 are required for the germination of some species. Although a number of species germ. significantly in the dark, light and GA-3 needs to be tried on all species. Multicycle patterns were common and some species germ. largely at 40. The seeds of all species are designed to be dispersed by wind so that it was presumed that DS would be tolerated. This was supported by the data for seeds DS 6 m, however seeds of C. lanuginosa hybrid seed was collected in October. The plumes are abundant on all seed heads whether or not there is any good seed. The good seed is evident as the seed coat is relatively large being disk shaped and about 8-10 mm. across. Seed germ. in the dark albeit after several cycles. The seedlings show the same behavior as described for Abeliophyllum distichum. The radicle develops to a length of 3-4 inches. Growth ceases for 2-3 m after which stem and leaves form in a hypogeal germ. Chilling or any other treatment does not accelerate this process, and the best treatment is to allow the seedlings to stay in the moist towel at 70 in a vertical position until stem growth starts and then plant. Seed sown when collected germ. 70-40-70-40- 70(88% in 10-14 w) and 40-70-40(4%)-70(85% in 10-14 w). Seed DS 6 m at 70 germ. 70-40(10%)-70(80%) and 40-70-40(3%)-70(76%). Seed DS 6 m at 40 germ. 70-40- 70(95%) and 40-70(30%)-40-70-40(8%). Light and GA-3 need to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Clematis p. 119. 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 Moderate Rated by us, not by the source.

Start around October 5, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on October 4, 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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 15 months from start to sowing. Then 98 days to germinate.

88% germination in 70–98 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Clematis p. 119Public domain
Show the original text
Clematis (Ranunculaceae). Light and/or GA-3 are required for the germination of some species. Although a number of species germ. significantly in the dark, light and GA-3 needs to be tried on all species. Multicycle patterns were common and some species germ. largely at 40. The seeds of all species are designed to be dispersed by wind so that it was presumed that DS would be tolerated. This was supported by the data for seeds DS 6 m, however seeds of C. lanuginosa hybrid seed was collected in October. The plumes are abundant on all seed heads whether or not there is any good seed. The good seed is evident as the seed coat is relatively large being disk shaped and about 8-10 mm. across. Seed germ. in the dark albeit after several cycles. The seedlings show the same behavior as described for Abeliophyllum distichum. The radicle develops to a length of 3-4 inches. Growth ceases for 2-3 m after which stem and leaves form in a hypogeal germ. Chilling or any other treatment does not accelerate this process, and the best treatment is to allow the seedlings to stay in the moist towel at 70 in a vertical position until stem growth starts and then plant. Seed sown when collected germ. 70-40-70-40- 70(88% in 10-14 w) and 40-70-40(4%)-70(85% in 10-14 w). Seed DS 6 m at 70 germ. 70-40(10%)-70(80%) and 40-70-40(3%)-70(76%). Seed DS 6 m at 40 germ. 70-40- 70(95%) and 40-70(30%)-40-70-40(8%). Light and GA-3 need to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Clematis p. 119. 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 January 3, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on January 2, 2026.

  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 germinated in this phase.

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 12 months from start to sowing. Then 98 days to germinate.

85% germination in 70–98 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Clematis p. 119Public domain
Show the original text
Clematis (Ranunculaceae). Light and/or GA-3 are required for the germination of some species. Although a number of species germ. significantly in the dark, light and GA-3 needs to be tried on all species. Multicycle patterns were common and some species germ. largely at 40. The seeds of all species are designed to be dispersed by wind so that it was presumed that DS would be tolerated. This was supported by the data for seeds DS 6 m, however seeds of C. lanuginosa hybrid seed was collected in October. The plumes are abundant on all seed heads whether or not there is any good seed. The good seed is evident as the seed coat is relatively large being disk shaped and about 8-10 mm. across. Seed germ. in the dark albeit after several cycles. The seedlings show the same behavior as described for Abeliophyllum distichum. The radicle develops to a length of 3-4 inches. Growth ceases for 2-3 m after which stem and leaves form in a hypogeal germ. Chilling or any other treatment does not accelerate this process, and the best treatment is to allow the seedlings to stay in the moist towel at 70 in a vertical position until stem growth starts and then plant. Seed sown when collected germ. 70-40-70-40- 70(88% in 10-14 w) and 40-70-40(4%)-70(85% in 10-14 w). Seed DS 6 m at 70 germ. 70-40(10%)-70(80%) and 40-70-40(3%)-70(76%). Seed DS 6 m at 40 germ. 70-40- 70(95%) and 40-70(30%)-40-70-40(8%). Light and GA-3 need to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Clematis p. 119. 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 Moderate 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. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    10 germinated in this phase.

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

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

80% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Clematis p. 119Public domain
Show the original text
Clematis (Ranunculaceae). Light and/or GA-3 are required for the germination of some species. Although a number of species germ. significantly in the dark, light and GA-3 needs to be tried on all species. Multicycle patterns were common and some species germ. largely at 40. The seeds of all species are designed to be dispersed by wind so that it was presumed that DS would be tolerated. This was supported by the data for seeds DS 6 m, however seeds of C. lanuginosa hybrid seed was collected in October. The plumes are abundant on all seed heads whether or not there is any good seed. The good seed is evident as the seed coat is relatively large being disk shaped and about 8-10 mm. across. Seed germ. in the dark albeit after several cycles. The seedlings show the same behavior as described for Abeliophyllum distichum. The radicle develops to a length of 3-4 inches. Growth ceases for 2-3 m after which stem and leaves form in a hypogeal germ. Chilling or any other treatment does not accelerate this process, and the best treatment is to allow the seedlings to stay in the moist towel at 70 in a vertical position until stem growth starts and then plant. Seed sown when collected germ. 70-40-70-40- 70(88% in 10-14 w) and 40-70-40(4%)-70(85% in 10-14 w). Seed DS 6 m at 70 germ. 70-40(10%)-70(80%) and 40-70-40(3%)-70(76%). Seed DS 6 m at 40 germ. 70-40- 70(95%) and 40-70(30%)-40-70-40(8%). Light and GA-3 need to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Clematis p. 119. 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 Moderate Rated by us, not by the source.

Start around September 22, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 21, 2025.

  1. Dry storage

    Duration: 180 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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    3 germinated in this phase.

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 18 months from start to sowing. Germination time not stated; 21 days assumed.

76% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Clematis p. 119Public domain
Show the original text
Clematis (Ranunculaceae). Light and/or GA-3 are required for the germination of some species. Although a number of species germ. significantly in the dark, light and GA-3 needs to be tried on all species. Multicycle patterns were common and some species germ. largely at 40. The seeds of all species are designed to be dispersed by wind so that it was presumed that DS would be tolerated. This was supported by the data for seeds DS 6 m, however seeds of C. lanuginosa hybrid seed was collected in October. The plumes are abundant on all seed heads whether or not there is any good seed. The good seed is evident as the seed coat is relatively large being disk shaped and about 8-10 mm. across. Seed germ. in the dark albeit after several cycles. The seedlings show the same behavior as described for Abeliophyllum distichum. The radicle develops to a length of 3-4 inches. Growth ceases for 2-3 m after which stem and leaves form in a hypogeal germ. Chilling or any other treatment does not accelerate this process, and the best treatment is to allow the seedlings to stay in the moist towel at 70 in a vertical position until stem growth starts and then plant. Seed sown when collected germ. 70-40-70-40- 70(88% in 10-14 w) and 40-70-40(4%)-70(85% in 10-14 w). Seed DS 6 m at 70 germ. 70-40(10%)-70(80%) and 40-70-40(3%)-70(76%). Seed DS 6 m at 40 germ. 70-40- 70(95%) and 40-70(30%)-40-70-40(8%). Light and GA-3 need to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Clematis p. 119. 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 March 21, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 20, 2026.

  1. Dry storage

    Duration: 180 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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  6. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    8 germinated in this phase.

Steps after step 3 run on after germination.

about 12 months from start to sowing. Germination time not stated; 21 days assumed.

30% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Clematis p. 119Public domain
Show the original text
Clematis (Ranunculaceae). Light and/or GA-3 are required for the germination of some species. Although a number of species germ. significantly in the dark, light and GA-3 needs to be tried on all species. Multicycle patterns were common and some species germ. largely at 40. The seeds of all species are designed to be dispersed by wind so that it was presumed that DS would be tolerated. This was supported by the data for seeds DS 6 m, however seeds of C. lanuginosa hybrid seed was collected in October. The plumes are abundant on all seed heads whether or not there is any good seed. The good seed is evident as the seed coat is relatively large being disk shaped and about 8-10 mm. across. Seed germ. in the dark albeit after several cycles. The seedlings show the same behavior as described for Abeliophyllum distichum. The radicle develops to a length of 3-4 inches. Growth ceases for 2-3 m after which stem and leaves form in a hypogeal germ. Chilling or any other treatment does not accelerate this process, and the best treatment is to allow the seedlings to stay in the moist towel at 70 in a vertical position until stem growth starts and then plant. Seed sown when collected germ. 70-40-70-40- 70(88% in 10-14 w) and 40-70-40(4%)-70(85% in 10-14 w). Seed DS 6 m at 70 germ. 70-40(10%)-70(80%) and 40-70-40(3%)-70(76%). Seed DS 6 m at 40 germ. 70-40- 70(95%) and 40-70(30%)-40-70-40(8%). Light and GA-3 need to be tried.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Clematis p. 119. 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.