Members of the Sisyrinchium genus can be either hardy or half hardy perennials and reach an height of between 30 and 90 cm.
Sisyrinchium blooms from spring to summer and carries small star shaped flowers atop long stems; these may be blue, yellow, purple or white.
One of the common names for Sisyrinchium plants is Blue Eyed Grass.
Latin names include Sisyrinchium striatum, Sisyrinchium angustifolium, and Sisyrinchium idahoense.
Sisyrinchium cuspidatum by Dick Culbert.
It is best to first sow the seeds of Sisyrinchium plant species such as Blue Eyed Grass in flats. Seeds should be sown at a depth of 6 mm. The flats should then be wrapped in a plastic bag and placed in the fridge for three weeks. The flat should then be sunk into the ground in a shady part of the garden and covered in glass.
The Blue eyed grass seeds should take anything from one to six months to germinate. Once the seedlings emerge, transplant them into a sunny part of the garden that has a slightly acidic soil (pH 5 to 6.5) that is moist and fertile. Depending on the species size plants should be spaced 10 cm (small) to 40 cm (large) apart.
Blue eyed grass and other Sisyrinchium require a little looking after; they like a moist soil so water frequently and do not allow the soil to dry out. Once they have finished blooming cut back the stems to ground level.
As plants may become invasive it is necessary to remove any plants that are not wanted.
If you require more plants and do not want to grow Sisyrinchium from seed then they can be propagated by division in the spring.
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