A low growing hardy perennial with fleshy, succulent deep purple-black foliage. Clusters of star-shaped, dark red blooms appear above the leaves from August to October. Height 45cm and Spread 45cm. Prefers full sun and gritty, well-drained soil. Hardy.
Sedum ‘Black Knight’ is a hardy perennial with dramatic deep purple-black succulent foliage and clusters of dark red star-shaped flowers, providing outstanding colour and texture from late summer into autumn.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: Plant Sedum ‘Black Knight’ in spring when the soil is workable and beginning to warm, allowing roots to establish before active growth.
Early Autumn: Early autumn is also an ideal planting time, giving the root system time to settle before the dormant season.
Site Selection
Sunlight: Sedum ‘Black Knight’ thrives in full sun, where both the foliage colour and flowering display are at their best.
Soil: Gritty, well-drained soil is essential. Improve drainage by incorporating grit or coarse sand into heavier soils before planting.
Planting Instructions
Prepare the Hole: Dig a hole twice the width and the same depth as the root ball to provide plenty of space for root development.
Soil Preparation: Mix grit or coarse sand into the excavated soil if required to improve drainage while maintaining good soil structure.
Planting: Position Sedum ‘Black Knight’ so the top of the root ball is level with the surrounding soil, then backfill gently and firm lightly.
Watering After Planting: Water thoroughly after planting to settle the soil and encourage healthy root establishment.
Watering Requirements
Growing Season: Water regularly while the plant establishes, allowing the soil to dry slightly between waterings.
Established Plants: Once established, Sedum ‘Black Knight’ is drought tolerant and only requires occasional watering during prolonged dry periods.
Feeding
Spring: Apply a light dressing of balanced fertiliser in early spring to encourage healthy growth and flowering.
Growing Season: Avoid excessive feeding, as overly rich soil can reduce the intensity of foliage colour and encourage soft growth in Sedum ‘Black Knight’.
Pruning
Deadheading: Remove faded flower heads if desired to maintain a tidy appearance.
Seasonal Care: Leave seed heads in place for winter interest, then cut back old stems in early spring before new growth appears.
Mulching
Spring: Apply a thin layer of gravel mulch around the base to suppress weeds and improve drainage.
Later in the Year: Avoid heavy organic mulches that retain excessive moisture around the crown.
Supporting the Plant
Natural Habit: Sedum ‘Black Knight’ has sturdy, upright stems and generally does not require staking or additional support.
Final Tips
Sedum ‘Black Knight’ is a hardy, low-maintenance perennial that combines bold foliage with attractive late-season flowers. With full sun, gritty well-drained soil, and minimal care, Sedum ‘Black Knight’ will provide reliable colour and structure year after year.
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