About
An evergreen perennial forming a clump of upright, narrow, blue-green, iris-like leaves to 50cm tall and wide. In summer, branching stems bear large clusters of bright yellow flowers that open in late afternoon.
About the genus
Sisyrinchium can be annuals or rhizomatous perennials forming a clump of narrowly sword-shaped leaves with erect stems carrying solitary or clustered, star-shaped or bell-shaped flowers in spring or summer
Growing conditions
SunlightFull sun
Soil typeChalk, Loam, Sand
Soil pHAlkaline, Neutral
Soil moistureWell-drained
AspectSouth-facing, West-facing
ExposureExposed, Sheltered
UK hardinessH4
Plant details
Plant typeHerbaceous Perennial
HabitClump forming, Tufted
FoliageSemi evergreen
Height0.1-0.5 metres
Spread0.1-0.5 metres
Time to full height2-5 years
Suggested usesCity and courtyard gardens, Cottage and informal garden, Gravel garden, Patio and container plants
Care notes
CultivationGrow in a poor to moderately fertile, well-drained, neutral to slightly alkaline soil in full sun. Protect from excessive winter wet. May have the potential to become a nuisance as seeds prolifically
PruningNo pruning required
PropagationPropagate by seed or by division
Pest resistanceGenerally pest-free
Disease resistanceMay be susceptible to root rot