Deno’s Garden

Potentilla megalantha

Genus Potentilla

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around October 3, 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: light

about 6 months from start to sowing. Then 4 days to germinate.

100% germination in 4 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Potentilla p. 196Public domain
Show the original text
Potentilla (Rosaceae). P. megalantha germ. 70L(65% in 2nd w), 70D GA-3(50% in 4th w), 70D(7%), 40- 70L(100% in 4th d), and -40-70D(none). These seeds had been DS for 6 m. There was evidence that DS for a y removed much of the light requirement.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Potentilla p. 196. 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 March 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 14 days to germinate.

65% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Potentilla p. 196Public domain
Show the original text
Potentilla (Rosaceae). P. megalantha germ. 70L(65% in 2nd w), 70D GA-3(50% in 4th w), 70D(7%), 40- 70L(100% in 4th d), and -40-70D(none). These seeds had been DS for 6 m. There was evidence that DS for a y removed much of the light requirement.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Potentilla p. 196. 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 March 8, 2027 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 28 days to germinate.

50% germination in 28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Potentilla p. 196Public domain
Show the original text
Potentilla (Rosaceae). P. megalantha germ. 70L(65% in 2nd w), 70D GA-3(50% in 4th w), 70D(7%), 40- 70L(100% in 4th d), and -40-70D(none). These seeds had been DS for 6 m. There was evidence that DS for a y removed much of the light requirement.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Potentilla p. 196. 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 Very high Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Germination time not stated; 21 days assumed.

7% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Potentilla p. 196Public domain
Show the original text
Potentilla (Rosaceae). P. megalantha germ. 70L(65% in 2nd w), 70D GA-3(50% in 4th w), 70D(7%), 40- 70L(100% in 4th d), and -40-70D(none). These seeds had been DS for 6 m. There was evidence that DS for a y removed much of the light requirement.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Potentilla p. 196. 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.