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Oenothera lavandulifolia

Lavenderleaf Sundrops

Family OnagraceaeGenus Oenothera

Frilled yellow flowers and others fading to apricot-pink, on a low clump of narrow leaves among white limestone chippings.
FlowerRotarenegCC BY-SA 3.0

About the plant

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

Habit
annual or perennialPlants of the World Online
Flower
YellowFlora of North America
Native range
Arizona, Colorado, Kansas, Mexico Northeast, Nebraska, New Mexico 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; Flora of North America — Flora of North America Editorial Committee; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around January 2, 2027 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

about 3 months from start to step 2. Germination happens during step 2, in 3 days.

100% germination in 3 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Calylophus p. 110Public domain
Show the original text
Calylophus (Onagraceae). C. lavandulifolius germ. 95% in 3-5 d in either 70L or 70D, 40-70(100% in 3rd d), and 70% in April in outdoor treatment. Seeds treated with GA-3 germ. 92% in 5-7 d at 70, which is slower than untreated seeds.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Calylophus p. 110. 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 Low Rated by us, not by the source.

  1. Sow outdoors and leave it

    Up in April.

No stated waiting before sowing.

70% germination.

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

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Calylophus p. 110Public domain
Show the original text
Calylophus (Onagraceae). C. lavandulifolius germ. 95% in 3-5 d in either 70L or 70D, 40-70(100% in 3rd d), and 70% in April in outdoor treatment. Seeds treated with GA-3 germ. 92% in 5-7 d at 70, which is slower than untreated seeds.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Calylophus p. 110. 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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