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Epilobium canum subsp. latifolium

Hummingbird Trumpet · Hummingbird-flower

Family OnagraceaeGenus Epilobium

Also published as Zauschneria arizonica, Zauschneria latifolia. You are in the right place.

A sprawling gray-leaved plant covered in narrow scarlet tubular flowers, spilling across coarse pale gravel.
The whole plantKrzysztof Ziarnek, KenraizCC BY-SA 4.0

About the plant

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

Habit
subshrub or shrubPlants of the World Online
Habit
Perennial, Forb/herb, SubshrubPLANTS Database
Flower
ScarletRead from the photograph on this page
Native range
Arizona, California, Mexico Northeast, Mexico Northwest, New Mexico, OregonGBIF 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; PLANTS Database — USDA NRCS; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

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 21, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

    80%, in 11-15 days -- it germinates in the cold.

  2. Warm moist stratification

    Temperature: 70°F 21°C

    A further 2%.

Germination happens during step 2, in 15 days.

80% germination in 11–15 days.

80% in the cold itself, in a fortnight. Better and faster than sowing warm.

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

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, ZauschneriaPublic domain
Show the original text
Zauschneria (Onagraceae). Z. arizonica germ. 70(75% in 30 d) and 40(80% in 11-15 d)-70(2%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Zauschneria. 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 March 6, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 30 days to germinate.

75% germination in 30 days.

75% at 70, and a month about it.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, ZauschneriaPublic domain
Show the original text
Zauschneria (Onagraceae). Z. arizonica germ. 70(75% in 30 d) and 40(80% in 11-15 d)-70(2%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Zauschneria. 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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