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Silene uniflora

Sea Campion

Family CaryophyllaceaeGenus Silene

A white flower with notched petals opening from a balloon-like calyx netted in pink veins, among blue-green paired leaves.
FlowerIxitixelCC BY-SA 3.0

About the plant

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

Habit
perennialPlants of the World Online
Flower
WhiteRead from the photograph on this page
Native range
Azores, Canary Is., Denmark, Finland, France, Great Britain and elsewhereGBIF 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.

Worth knowing

  • The name sea campion dates to 1597. It is one of the long-lived perennials that settle on coastal shingle once it has been stable for five to twenty years. Wikipedia: Silene uniflora

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

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

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 21 days to germinate.

100% germination in 21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Silene p. 78Public domain
Show the original text
Silene (Caryophyllaceae). S. uniflora germ. 70 GA-3(100% in 3rd w), 20% in 2-10 w in either 70D or 70L, and OT(13% in March). Seeds DS 6 m germ. similarly, but seeds DS 1 y germ. 70 GA- 3(20% ion 6th d) and 70D(40% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Silene p. 78. 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 Moderate Rated by us, not by the source.

Start around March 16, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 15, 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 21 days to germinate.

40% germination in 21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Silene p. 78Public domain
Show the original text
Silene (Caryophyllaceae). S. uniflora germ. 70 GA-3(100% in 3rd w), 20% in 2-10 w in either 70D or 70L, and OT(13% in March). Seeds DS 6 m germ. similarly, but seeds DS 1 y germ. 70 GA- 3(20% ion 6th d) and 70D(40% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Silene p. 78. 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 High 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. Gibberellic acid soak

  3. Sow and cover

    Temperature: 70°F 21°C

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

20% germination in 6 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Silene p. 78Public domain
Show the original text
Silene (Caryophyllaceae). S. uniflora germ. 70 GA-3(100% in 3rd w), 20% in 2-10 w in either 70D or 70L, and OT(13% in March). Seeds DS 6 m germ. similarly, but seeds DS 1 y germ. 70 GA- 3(20% ion 6th d) and 70D(40% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Silene p. 78. 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 High Rated by us, not by the source.

  1. Sow outdoors and leave it

    Up in March.

No stated waiting before sowing.

13% germination.

This source doesn't state how long step 1 lasts.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Silene p. 78Public domain
Show the original text
Silene (Caryophyllaceae). S. uniflora germ. 70 GA-3(100% in 3rd w), 20% in 2-10 w in either 70D or 70L, and OT(13% in March). Seeds DS 6 m germ. similarly, but seeds DS 1 y germ. 70 GA- 3(20% ion 6th d) and 70D(40% in 3rd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Silene p. 78. 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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