About
A semi-evergreen perennial to 50cm, producing clumps of narrow, dark green, grass-like foliage and upright stems bearing deep blue, yellow-throated flowers 2cm across all summer.
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 hardinessH5
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, Patio and container plants, Rock garden
Native toE Canada to C & E USA
Care notes
CultivationGrow in 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 in spring. Self-seeds readily
Pest resistanceGenerally pest-free
Disease resistanceMay be susceptible to root rot