Skip to product information
1 of 7
  • Play video

Scabious 'Black Knight' Seeds

Scabious 'Black Knight' (Scabiosa atropurpurea) is an essential addition for anyone looking to add drama, depth, and mystery to their borders. It produces an abundance of dome-shaped, pincushion flowers in a deep shade of maroon-purple that so closely resembles black velvet it is often mistaken for it. The dark petals are beautifully speckled with white stamens that look like tiny pins in a cushion, giving it its famous common name.

Released on warm days, the flowers produce a subtle, sweet honey fragrance that attracts bees and butterflies in droves. Standing tall on long, wiry stems (up to 90cm), 'Black Knight' is a firm favourite for florists because it adds a moody, sophisticated touch to any summer bouquet. It is a tough, reliable hardy annual that follows the 'Cut and Come Again' rule—the more you pick, the more it produces!


Read More

🌿 Understanding the Plant

Scabiosa atropurpurea 'Black Knight' is a Hardy Annual (H4). It is a high-performing "workhorse" of the cottage garden, completing its entire life cycle in a single season while showing surprising resilience to typical British weather.

Floral Architecture: The blooms are composed of a dense, dark central cushion surrounded by delicate outer petals. The contrasting white anthers (the "pins") create a shimmering effect against the deep maroon velvet backdrop.

Biodiversity Star: Listed on the RHS Plants for Pollinators list, it is an absolute magnet for bees and butterflies. Its flat-topped structure provides the perfect landing platform for pollinators to forage throughout the summer.

🌱 Growing Guide

Scabious are robust and easy to grow, provided they are given maximum sunlight and excellent drainage.

How to Sow:
Sow indoors from March to April for early blooms, or in September to overwinter for even stronger plants next year. Surface sow onto moist compost and cover with a very light dusting of vermiculite—seeds require light to germinate. Maintain a temperature of 18-20°C; seedlings typically appear in 10-14 days. Alternatively, direct sow outdoors in May once the soil has warmed.

Where to Plant:
Plant out in late May in full sun. They thrive in neutral to alkaline (chalky) soil. If you have heavy clay, add grit to the planting hole, as they will rot if their roots sit in winter-wet soil.

Ongoing Care:
Support the 90cm stems early in the season with twiggy sticks or netting to prevent them from flopping in summer storms. Deadhead regularly to prevent the plant from setting seed; this signals the plant to keep producing new "pincushions" until the first frosts of November.

📋 Plant Specifications
Botanical Name Scabiosa atropurpurea
Common Name Pincushion Flower / Sweet Scabious
Plant Type Hardy Annual
Hardiness H4 (Hardy)
Light Requirements Full Sun ☀️
Height 90cm
Spread 30cm
Spacing Plant 30cm apart
Flowering Period July to November
Seeds per Packet Approximately 50 seeds
🤝 Beautiful Garden Combinations

The velvety maroon of 'Black Knight' is a designer's secret for creating sophisticated contrasts:

  • ☁️ Cosmos 'Purity': The Monochrome Look. The airy, pristine white flowers of Cosmos 'Purity' provide a stark, modern contrast to the heavy, dark velvet columns of the Scabious. This duo is a staple for professional-standard bouquets.
  • 🌿 Ammi Majus: The Textural Match. Pairing the deep "cushions" of Scabious with the light, frothy white lace of Ammi Majus creates a romantic, meadow-style display that is a favourite for wedding floristry.
📅 Sowing & Flowering Calendar

Sow in spring for summer colour, or in autumn to overwinter for earlier, stronger plants.

Month J F M A M J J A S O N D
Sow Indoors
Sow Outdoors
Flowering

🏆 RHS Plants for Pollinators

Scabious 'Black Knight' is officially listed on the RHS Plants for Pollinators list. Its nectar-rich dome flowers are a vital food source for butterflies, who use the landing pad to feed continuously throughout the peak of summer.

📖 Want more detailed growing advice?
View our Complete Growing Guide for Hardy Annuals →

Regular price
£2.40
Regular price
Sale price
£2.40
Tax included. Shipping calculated at checkout.

    5 total reviews

    Scabious Black Knight - Bishy Barnabees Cottage Garden Ltd
    Scabious Black Knight - Bishy Barnabees Cottage Garden Ltd
    Scabious Black Knight - Bishy Barnabees Cottage Garden Ltd
    Scabious Black Knight - Bishy Barnabees Cottage Garden Ltd
    Scabious Black Knight - Bishy Barnabees Cottage Garden Ltd
    Scabious Black Knight - Bishy Barnabees Cottage Garden Ltd
    Scabious Black Knight