A clump-forming perennial with narrow dark green leaves. Upright stems of pretty bright sapphire blue flowers in summer. Height 10cm to 15cm. Spread 10cm. Flowers June to August. Full sun. Hardy.
Sisyrinchium ‘Sapphire’ is a compact, clump-forming perennial admired for its narrow green foliage and vibrant sapphire-blue flowers that brighten borders, rockeries, gravel gardens, and containers throughout summer.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: Plant Sisyrinchium ‘Sapphire’ in spring when the soil is workable and beginning to warm, allowing the roots to establish before active growth.
Early Autumn: Early autumn is also an ideal planting time, giving the root system time to settle before dormancy.
Site Selection
Sunlight: Sisyrinchium ‘Sapphire’ thrives in full sun, where it produces the best flowering display and maintains a compact habit.
Soil: Well-drained, moderately fertile soil is ideal. Improve drainage with grit or coarse sand if planting in heavier soils.
Planting Instructions
Prepare the Hole: Dig a hole twice the width and the same depth as the root ball so the roots have plenty of room to spread.
Soil Preparation: Mix compost or organic matter into the excavated soil where needed to improve soil structure while maintaining free drainage.
Planting: Position Sisyrinchium ‘Sapphire’ with the top of the root ball level with the surrounding soil, then backfill gently and firm lightly.
Watering After Planting: Water thoroughly after planting to settle the soil and encourage strong root establishment.
Watering Requirements
Growing Season: Keep the soil lightly moist while the plant establishes, allowing the surface to dry slightly between waterings.
Established Plants: Once established, Sisyrinchium ‘Sapphire’ requires only occasional watering during prolonged dry spells, as it prefers well-drained conditions.
Feeding
Spring: Apply a balanced fertiliser in early spring to encourage healthy foliage and abundant flowering.
Mid-Season: A light supplementary feed can help support continued flowering throughout the summer months.
Pruning
Deadheading: Remove faded flowers regularly to encourage additional blooms and keep the plant looking tidy.
Seasonal Care: Trim away damaged or tired foliage after flowering to maintain a neat appearance and encourage fresh growth.
Mulching
Spring: Apply a light layer of organic mulch around the base to suppress weeds and help conserve moisture without covering the crown.
Later in the Year: Refresh the mulch if necessary while ensuring good airflow around the plant.
Supporting the Plant
Natural Habit: Sisyrinchium ‘Sapphire’ has a naturally compact, upright habit and does not require staking or additional support.
Final Tips
Sisyrinchium ‘Sapphire’ is an easy-care perennial that provides brilliant blue flowers and attractive foliage with very little maintenance. Given a sunny position, free-draining soil, and routine deadheading, Sisyrinchium ‘Sapphire’ will reward you with reliable colour year after year.
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