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Sisyrinchium (Blue-Eyed Grass) & Olsynium

Sisyrinchium or Blue-Eyed Grass and Olsynium are closely related genera within the iris family (Iridaceae) and are native of North and South America. They are perennial to short-lived dwarf plants with tiny, iris-like foliage and grow in moist to damp places in shade to full sun. They make small, but numerous flowers from spring to summer. In Olsynium flowers and seeds are usually larger than in Sisyrinchium. They are suited for any humus rich, leafy, well drained soil, which should stay slightly moist in summer and be kept drier in winter, if possible. Excellent for a partially shaded to sunny, protected spot in the rock garden. Will form nice, rich-flowering clumps in time. Most species from the Andes in South America are fully hardy to -15°C in the northern hemisphere (i.e. in Europe and most of the US) with some protective dry mulch layer in winter.
Sow flat at minimum 5°C (preferably in spring) in any well drained, sandy and humus rich soil. Keep pots in a protected, partially shaded spot. Transplant rhizomes in late summer so that plants will be able to develop sufficient roots in autumn.
All are USDA Climate Zone 7/8.
20 seeds per package for all Sisyrinchium species, respectively 10 seeds per package for all Olsynium species.
Articles
Olsynium douglasii (Douglas' Grasswidow)

Olsynium douglasii (Douglas' Grasswidow)

20cm, Douglas' Grasswidow (syn. Sisyrinchium douglasii) is a herbaceous fully winterhardy species from western North American (southern British Columbia to northern California, and northwest Utah). It bears slender, grass-like leaves and showy nodding dark rich pink flowers. For any rich, very well drained, rocky soil in a sunny spot. VI-VII.
10 seeds per package.

price (plus Shipping Costs)
seed package6834 € 4,99
Sisyrinchium albidum (White Blue-Eyed Grass)

Sisyrinchium albidum (White Blue-Eyed Grass)

20cm, White Blue-Eyed Grass makes a basal rosette of grass like leaves and an upright short stalk with creamy white to white flowers. It is native of prairies, savannas and open spots in woods in eastern North America. For any rich, well drained soil in a sunny spot. Excellent in the rock garden. VII-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package 5460 € 4,99*
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.
Sisyrinchium angustifolium (syn. Sisyrinchium anceps)

Sisyrinchium angustifolium (syn. Sisyrinchium anceps)

20 (30)cm, small blue, lilac-shaded flowers on tall, narrow, lax stalks above narrow, grass like leaves. Native of stony meadows and hillsides in south-western USA. For any rich, stony, very well drained soil in full sun. Excellent in the rock garden. Please note that most nurseries in the US wrongly sell S. bermudianum L. under this name, which is a distinct species (see below). The correct synonym for S. angustifolium is S. bermudiana auct. non. L. V-VII.
20 seeds per package.

price (plus Shipping Costs)
seed package 1784 € 4,99*
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.
Sisyrinchium bellum

Sisyrinchium bellum

15 (20)cm, numerous small, white (rarely pale sky blue) flowers for a long time. Narrow, very short, grass like leaves. Native of meadows in W USA (California). For any rich, yet well drained soil in a sunny spot. V-VI.
20 seeds per package.

price (plus Shipping Costs)
seed package 1785 € 4,99*
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.
Sisyrinchium bermudianum L.

Sisyrinchium bermudianum L.

20 (30)cm, showy deep bluish-violet flowers with a yellow throat above grass like, almost evergreen leaves. Native of W USA and Canada. For any rich, stony or sandy, well drained soil in full sun to partial shade. Please note that most nurseries in the US sell this species under the false name S. angustifolium, which is a distinct species (see above). The correct synonym for S. angustifolium is S. bermudiana auct. non. L and not S. bermudianum L. V-VII.
20 seeds per package.

price (plus Shipping Costs)
seed package 1786 € 2,99*
seed package
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.
Sisyrinchium californicum (California Golden-Eyed Grass)

Sisyrinchium californicum (California Golden-Eyed Grass)

30 (50)cm, California Golden-Eyed Grass is a semi-evergreen to herbaceous perennial with grass like leaves and showy stalks with bright yellow flowers. It is native of slightly moist soils in costal western North America (British Columbia to central California). For any humus rich, well drained soil in a sunny spot. V-VI.
20 seeds per package.

price (plus Shipping Costs)
seed package6833 € 4,99*
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.
Sisyrinchium campestre (Prairie Blue-eyed Grass)

Sisyrinchium campestre (Prairie Blue-eyed Grass)

25cm, Prairie Blue-eyed Grass has showy pale blue to white flowers above grass-like foliage. It is native of moist meadows in central North America. For any humus rich, well drained soil in a sunny spot. V-VI.
20 seeds per package.

price (plus Shipping Costs)
seed package (blue flowered)6630 € 4,99
(blue flowered)
seed package (white flowered)6631 € 4,99*
seed package (white flowered)
(white flowered)
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.
Sisyrinchium convolutum

Sisyrinchium convolutum

15cm, a nice, clump forming species with broader, yellow green leaves and numerous, quite large bright yellow, star shaped flowers for along time. Native of south-western USA (Sonora Desert) extending south to subalpine meadows in N South America (Colombia, Páramo de Chingaza). For any rich, well drained soil in a sunny spot. V-VI.
20 seeds per package.

price (plus Shipping Costs)
seed package 1787 € 4,99
Sisyrinchium cuspidatum

Sisyrinchium cuspidatum


20 seeds per package.

price (plus Shipping Costs)
seed package0028 € 4,99
Sisyrinchium idahoense (Idaho Blue-Eyed Grass)

Sisyrinchium idahoense (Idaho Blue-Eyed Grass)

20cm, Idaho Blue-Eyed Grass is a short lived dwarf perennial with lilac blue flowers with a golden yellow throat above grass like leaves. It is native of mountain meadows from British Columbia south to California. For any humus rich, very well drained soil in a sunny spot. Will readily self sow under appropriate conditions. V-VI.
20 seeds per package.

price (plus Shipping Costs)
seed package 6225 € 4,99
Sisyrinchium palmifolium

Sisyrinchium palmifolium

40 (60)cm, a showy and still rarely cultivated evergreen perennial with numerous large, rich yellow flowers above rather broad and iris like, bluish-green leaves. Native of montane meadows in South America. Fully winter hardy in a protected, sunny spot in any rich, well drained soil in a sunny spot. In colder climates give plants some additional winter protection (e.g. a dry mulch layer). IV-V.
20 seeds per package.

price (plus Shipping Costs)
seed package 6112 € 3,99*
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.
Sisyrinchium pearcei (Pearce's Blue-eyed Grass)

Sisyrinchium pearcei (Pearce's Blue-eyed Grass)

10 (15)cm, Pearce's Blue-eyed Grass is a dwarf perennial with pale lemon yellow flower cups with dark brownish stripes inside the throat above narrow, iris like leaves. Native of montane meadows in southern Chile. Fully winter hardy in a protected, sunny spot in any rich, well drained soil in a sunny spot. In colder climates give plants some additional winter protection (e.g. a dry mulch layer). IV-V.
20 seeds per package.

price (plus Shipping Costs)
seed package 5002 € 4,99
Sisyrinchium scirpoideum var. scirpoideum

Sisyrinchium scirpoideum var. scirpoideum


20 seeds per package.

price (plus Shipping Costs)
seed package6866 € 4,99
seed package
Sisyrinchium striatum

Sisyrinchium striatum

30 (50)cm, large Iris-like foliage and numerous spikes with hundreds of middle sized, cream yellow flowers. For a sunny position in any rich soil. One of the easiest Sisyrinchium species having a long flowering period from V-VII.
20 seeds per package.

price (plus Shipping Costs)
seed package 1790 € 2,99*
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.