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Erysimum capitatum

Prairie Rocket · Sand-dune Wallflower · Western Wallflower · Sanddune Wallflower

Family BrassicaceaeGenus Erysimum

A dense head of orange-yellow four-petalled flowers around a center of purple-tipped buds
FlowerEric in SFCC BY-SA 3.0

About the plant

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

Habit
biennial or subshrubPlants of the World Online
Habit
Biennial, Perennial, Forb/herb, SubshrubPLANTS Database
Flower
Orange, yellowFlora of North America
Native range
Alaska, lower 48 statesPLANTS Database

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; PLANTS Database — USDA NRCS; Flora of North America — Flora of North America Editorial Committee.

Worth knowing

  • The western wallflower ranges from the Great Lakes to the West Coast. Some varieties grow only in tiny areas, especially in California. Wikipedia: Erysimum capitatum

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around March 28, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: either

No stated waiting before sowing. Then 8 days to germinate.

83% germination in 5–8 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Erysimum p. 140Public domain
Show the original text
Erysimum (Brassicaceae). E. nivale germ. 70(10/12 in 5-8 d) and 40(6/13 in 3-6 w)-70(2/13). Light had no effect.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Erysimum p. 140. 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 February 22, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  2. Warm moist stratification

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

    2/13 germinated in this phase.

Steps after step 1 run on after germination.

Germination happens during step 1, in 42 days.

46% germination in 21–42 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Erysimum p. 140Public domain
Show the original text
Erysimum (Brassicaceae). E. nivale germ. 70(10/12 in 5-8 d) and 40(6/13 in 3-6 w)-70(2/13). Light had no effect.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Erysimum p. 140. 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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