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Kelseya uniflora

Oneflower Kelseya

Family RosaceaeGenus Kelseya

A dense green cushion clinging to pale rock, freckled all over with tiny flowers that are crimson in bud and white when open.
The whole plantLaura HollowayCC0

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
shrubPlants of the World Online
Flower
Reddish-purple, pinkish whiteWikipedia

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Wikipedia — Wikipedia contributors.

Worth knowing

  • The only species in its genus, named for Francis Duncan Kelsey, a Montana botanist who found it in 1888 at the Gate of the Mountains near Townsend. Wikipedia: Kelseya

This source reports 6 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

Start around February 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 42 days to germinate.

100% germination in 7–42 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Kelseya p. 51Public domain
Show the original text
Kelseya (Rosaceae). K. uniflora, first sample DS 6 m germ. 70 GA-3(100% in 1-3 w), 70D(none), 40(10%)-70(40% in 1-5 w), and 100% in April in outdoor treatment. A second sample of fresh seeds germ. 70D(2/4 in 3rd w), 70D(4/4 in 1-6 w) if preceded by 4 w of OS, 40-70D(2/4), and none in the other treatments. The discrepancies may be due to differences in the amount of DS.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Kelseya p. 51. 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, 1996

Difficulty Low Rated by us, not by the source.

Start around September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Gibberellic acid soak

  3. Sow and cover

    Temperature: 70°F 21°C

about 6 months from start to sowing. Then 21 days to germinate.

100% germination in 7–21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Kelseya p. 51Public domain
Show the original text
Kelseya (Rosaceae). K. uniflora, first sample DS 6 m germ. 70 GA-3(100% in 1-3 w), 70D(none), 40(10%)-70(40% in 1-5 w), and 100% in April in outdoor treatment. A second sample of fresh seeds germ. 70D(2/4 in 3rd w), 70D(4/4 in 1-6 w) if preceded by 4 w of OS, 40-70D(2/4), and none in the other treatments. The discrepancies may be due to differences in the amount of DS.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Kelseya p. 51. 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, 1996

Difficulty Low Rated by us, not by the source.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Sow outdoors and leave it

    Up in April.

about 6 months from start to sowing.

100% germination.

This source doesn't state how long step 2 lasts.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Kelseya p. 51Public domain
Show the original text
Kelseya (Rosaceae). K. uniflora, first sample DS 6 m germ. 70 GA-3(100% in 1-3 w), 70D(none), 40(10%)-70(40% in 1-5 w), and 100% in April in outdoor treatment. A second sample of fresh seeds germ. 70D(2/4 in 3rd w), 70D(4/4 in 1-6 w) if preceded by 4 w of OS, 40-70D(2/4), and none in the other treatments. The discrepancies may be due to differences in the amount of DS.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Kelseya p. 51. 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, 1996

Difficulty Moderate 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. Then 21 days to germinate.

50% germination in 21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Kelseya p. 51Public domain
Show the original text
Kelseya (Rosaceae). K. uniflora, first sample DS 6 m germ. 70 GA-3(100% in 1-3 w), 70D(none), 40(10%)-70(40% in 1-5 w), and 100% in April in outdoor treatment. A second sample of fresh seeds germ. 70D(2/4 in 3rd w), 70D(4/4 in 1-6 w) if preceded by 4 w of OS, 40-70D(2/4), and none in the other treatments. The discrepancies may be due to differences in the amount of DS.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Kelseya p. 51. 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, 1996

Difficulty Moderate Rated by us, not by the source.

Start around December 15, 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

about 3 months from start to step 2. Germination happens during step 2; time not stated, 21 days assumed.

50% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Kelseya p. 51Public domain
Show the original text
Kelseya (Rosaceae). K. uniflora, first sample DS 6 m germ. 70 GA-3(100% in 1-3 w), 70D(none), 40(10%)-70(40% in 1-5 w), and 100% in April in outdoor treatment. A second sample of fresh seeds germ. 70D(2/4 in 3rd w), 70D(4/4 in 1-6 w) if preceded by 4 w of OS, 40-70D(2/4), and none in the other treatments. The discrepancies may be due to differences in the amount of DS.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Kelseya p. 51. 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, 1996

Difficulty Moderate Rated by us, not by the source.

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

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    10 germinated in this phase.

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 9 months from start to step 3. Germination happens during step 3, in 35 days.

40% germination in 7–35 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Kelseya p. 51Public domain
Show the original text
Kelseya (Rosaceae). K. uniflora, first sample DS 6 m germ. 70 GA-3(100% in 1-3 w), 70D(none), 40(10%)-70(40% in 1-5 w), and 100% in April in outdoor treatment. A second sample of fresh seeds germ. 70D(2/4 in 3rd w), 70D(4/4 in 1-6 w) if preceded by 4 w of OS, 40-70D(2/4), and none in the other treatments. The discrepancies may be due to differences in the amount of DS.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Kelseya p. 51. 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.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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