Deno’s GardenMy Garden

Primula nevadensis

Nevada Primrose

Family PrimulaceaeGenus Primula

Magenta-pink primrose flowers growing from a crack in pale rock beside a tuft of needle-like leaves
FlowerRyan SorrellsCC BY 4.0

About the plant

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

Habit
perennialPlants of the World Online
Flower
Magenta-pinkRead from the photograph on this page
Native range
NevadaGBIF Backbone Taxonomy

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; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Two sources report three treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around December 31, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 30, 2025.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    17 germinated in this phase.

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

about 15 months from start to step 3. Germination happens during step 3, in 6 days.

45% germination in 2–6 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Primula p. 56Public domain
Show the original text
Primula (Primulaceae). The following seed samples were dead: P. nevadensis DS 1 y germ. 70D(40% on 6th d) and 40(17% in 4th w)-70D(45% in 2-6 d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Primula p. 56. 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 Moderate Rated by us, not by the source.

Start around March 31, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 30, 2026.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

about 12 months from start to sowing. Then 6 days to germinate.

40% germination in 6 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Primula p. 56Public domain
Show the original text
Primula (Primulaceae). The following seed samples were dead: P. nevadensis DS 1 y germ. 70D(40% on 6th d) and 40(17% in 4th w)-70D(45% in 2-6 d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Primula p. 56. 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 Moderate Rated by us, not by the source.

Start around March 26, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 10 days to germinate.

50% germination in 4–10 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Primula p. 68Public domain
Show the original text
Primula (Primulaceae). P. nevadensis germ. 70D(50% in 4-10 d).'A prior 3 m at 40 had little effect.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Primula p. 68. 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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