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Ipomopsis aggregata

Scarlet Trumpet · Scarlet Gilia · Scarlet Skyrocket

Family PolemoniaceaeGenus Ipomopsis

Scarlet tubular flowers with sharply flared lobes, on a stem of fine thread-like leaves among scree
FlowerWalter Siegmund (talk)CC BY-SA 3.0

About the plant

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

Habit
biennial or perennialPlants of the World Online
Habit
Biennial, Perennial, Forb/herbPLANTS Database
Flower
RedWikipedia
Native range
Arizona, British Columbia, California, Colorado, Idaho, Mexico Northeast 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; PLANTS Database — USDA NRCS; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

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 4, 2027 for a May 3 last frost.

  1. Cold moist stratification

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

    10 germinated in this phase.

  2. Warm moist stratification

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

about 3 months from start to step 2. Germination happens during step 2, in 1 days.

70% germination in 1 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Ipomopsis p. 156Public domain
Show the original text
Ipomopsis (Polemoniaceae). I. aggregata germ. 70(50% in 5-10 d) and 40(10%)-70(70% in 1 d). Light had no effect.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Ipomopsis p. 156. 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 26, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: either

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

50% germination in 5–10 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Ipomopsis p. 156Public domain
Show the original text
Ipomopsis (Polemoniaceae). I. aggregata germ. 70(50% in 5-10 d) and 40(10%)-70(70% in 1 d). Light had no effect.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Ipomopsis p. 156. 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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