We're offering you a 1, 2 or 3 Agapanthus Black Jack for £9.99, saving you up to 33% off Thompson and Morgan's's price of £14.99 (correct as of 11.09.2025).

Agapanthus Black Jack – Botanical Brilliance for Your Garden

Agapanthus Black Jack, part of the renowned Everpanthusae Series, is a standout perennial prized for its dramatic, deep purple flower heads. Voted Chelsea Plant of the Year 2023, this variety delivers both beauty and reliable performance, making it a must-have for any garden enthusiast.

• Breathtaking Blooms: Silky buds unfurl into rich, purplish-black flowers held high on sturdy stems, creating an eye-catching display from midsummer right through to autumn.
• Architectural Appeal: Spherical flower clusters rise above strappy, semi-evergreen foliage, adding height and structure to beds, borders, and containers.
• Compact Yet Impactful: With a mature height of around 80cm and a spread of 70cm, Black Jack is perfect for patio pots or smaller garden spaces without compromising on visual drama.
• Wildlife Magnet: Loved by bees and butterflies, this agapanthus brings pollinators into your garden while offering movement and life to your displays.
• Tough & Adaptable: Heat and drought tolerant once established, it thrives in sunny spots—ideal for low-maintenance gardeners or coastal planting schemes.

Growing Guide & Care Tips

• Planting Time: Best planted in spring or early summer after the risk of frost has passed.
• Sunlight: Prefers full sun but will tolerate light shade. The more sun it receives, the more abundant the blooms.
• Soil Requirements: Grows best in well-drained soil with moderate fertility; avoid waterlogged conditions. Slightly acidic to neutral pH is ideal.
• Irrigation: Water regularly during the first growing season. Once established, Agapanthus Black Jack is drought tolerant—water sparingly during dry spells.
• Feeding: Apply a balanced liquid fertiliser monthly from spring until flowering finishes. Avoid high-nitrogen feeds which can reduce flowering.
• Caring For Your Plant: Remove spent flower heads to encourage further blooming. In colder areas (below USDA Zone 8), provide winter protection or move pots indoors during frosts.
• Pots & Borders: Equally suited to large containers or mixed borders—try pairing with ornamental grasses or lavender for contrasting texture and colour.

FAQs

• When is the best time to plant Agapanthus Black Jack?
  The ideal time is in spring or early summer once frost risk has passed.
• How tall and wide does it grow?
  This variety typically reaches up to 80cm tall with a spread of around 70cm at maturity.
• Does it need much maintenance?
  No—once established, it requires minimal care beyond occasional watering and deadheading spent blooms. Protect pots in harsh winters if needed.