Deno’s GardenMy Garden

Sisyrinchium angustifolium

Blue-eyed Grass · Common Blue-eyed Grass · Narrow-leaf Blue-eyed-grass · Narrowleaf Blue-eyed Grass

Family IridaceaeGenus Sisyrinchium

A pale blue-violet flower of six pointed tepals with a bright yellow throat and darker veining, on a flat green stem, against white.
FlowerHugowolfCC BY 3.0

About the plant

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

The plant

Habit
Ground Cover, Herbaceous Perennial, WildflowerExtension Gardener Plant Toolbox
Habit
perennialPlants of the World Online
Height
1.5-2 ft45-60 cmExtension Gardener Plant Toolbox
Spread
0.5-1 ft15-30 cmExtension Gardener Plant Toolbox
Flower
Blue, Gold/Yellow, Purple/Lavender, WhiteExtension Gardener Plant Toolbox
Blooms
Spring, SummerExtension Gardener Plant Toolbox
Native range
Canada, lower 48 statesPLANTS Database
Hardiness zones
4-9Extension Gardener Plant Toolbox

Growing conditions

Sun
Full sun; Partial ShadeExtension Gardener Plant Toolbox
Soil
Clay, High Organic Matter, Loam (Silt), SandExtension Gardener Plant Toolbox
Soil pH
Acid (<6.0), Neutral (6.0-8.0)Extension Gardener Plant Toolbox
Moisture
Good Drainage, Moist, Occasionally DryExtension Gardener Plant Toolbox
Watering
Drought tolerance: LowPLANTS Database

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Extension Gardener Plant Toolbox — NC State Extension; Plants of the World Online — Royal Botanic Gardens, Kew; PLANTS Database — USDA NRCS.

Worth knowing

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 February 1, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 63 days to germinate.

40% germination in 42–63 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. angustifolium germ. 70L(40% in 6-9 w), 40-70L(15%), and none in 70D or 40- 70D. GA-3 did not stimulate germination.
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 December 15, 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; time not stated, 21 days assumed.

15% germination.

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. angustifolium germ. 70L(40% in 6-9 w), 40-70L(15%), and none in 70D or 40- 70D. GA-3 did not stimulate germination.
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. angustifolium germ. 70L(40% in 6-9 w), 40-70L(15%), and none in 70D or 40- 70D. GA-3 did not stimulate germination.
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

Add to My Garden

View species page