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Sisyrinchium demissum

Dwarf Blue-eyed Grass · Stiff Blue-eyed Grass

Family IridaceaeGenus Sisyrinchium

A pale blue-violet flower of six pointed tepals around a yellow center, with a golden style standing above it, beside a swelling green pod.
FlowerAbraham Sánchez Romero https://www.inaturalist.org/people/abrahamsanchezCC BY 4.0

About the plant

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

Habit
perennialPlants of the World Online
Habit
Perennial, Forb/herbPLANTS Database
Flower
Dark bluish violetFlora of North America
Native range
Arizona, Colorado, Mexico Northeast, Mexico Northwest, New Mexico, Texas 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; Flora of North America — Flora of North America Editorial Committee; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

  • Demissum means "humble". Stiff blue-eyed grass is a small member of the iris family, grown in native plant gardens in the western United States, particularly in moist spots such as near downspouts. Wikipedia: Sisyrinchium demissum

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around December 22, 2026 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 Light: light

about 3 months from start to step 2. Germination happens during step 2, in 14 days.

57% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Sisyrinchium p. 215Public domain
Show the original text
Sisyrinchium (lridaceae). Light and outdoor conditions should be tried. S. demissum album germ. 70L(15% in 1-4 w), 40-70L(57% in 2nd w), and none in 70D and 70 GA-3.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Sisyrinchium p. 215. 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 High Rated by us, not by the source.

Start around March 8, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 28 days to germinate.

15% germination in 7–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Sisyrinchium p. 215Public domain
Show the original text
Sisyrinchium (lridaceae). Light and outdoor conditions should be tried. S. demissum album germ. 70L(15% in 1-4 w), 40-70L(57% in 2nd w), and none in 70D and 70 GA-3.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Sisyrinchium p. 215. 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, 1993

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Sisyrinchium p. 215Public domain
Show the original text
Sisyrinchium (lridaceae). Light and outdoor conditions should be tried. S. demissum album germ. 70L(15% in 1-4 w), 40-70L(57% in 2nd w), and none in 70D and 70 GA-3.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Sisyrinchium p. 215. Quoted exactly. Every value on this card comes from this record; 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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