Plant Base Online (beta)
© Deeproot Plant Base
synonyms: Sisyrinchium boreale, Sisyrinchium brachypus
growth rate: medium
growth habit: spiky
leaf colour: grey-green
flower colour: yellow
main season: Summer
dry soil, moist soil, sandy soil
preferred soil pH: neutral-alkaline
minimum temp: -18°C
USDA zone: 5 to 8
Short-lived semi-evergreen perennial with narrow sword-shaped, grey-green leaves. Broadly winged stems carry a succession of star-shaped, dark veined, yellow flowers in late spring and summer.
Well drained, poor to moderately fertile, neutral or slightly alkaline soil in full sun. Dislikes excessive winter wet.
From seed or by division. May self seed freely in suitable conditions.
From Western North America.