Description
Agapanthus Dark Silk
Agapanthus Dark Silk is a striking deciduous agapanthus producing dramatic dark purple-black flower buds that gradually open into rich inky blue flowers throughout summer. Held on strong upright stems above clumps of lush green strap-shaped foliage, the flowers create an elegant and sophisticated display in sunny borders, patio containers and mixed perennial planting schemes. Growing to approximately 60–130cm in height depending on growing conditions, this exceptional variety is valued for its unusual flower colour, strong stems and long-lasting garden performance.
Why Choose Agapanthus Dark Silk?
The almost black flower buds provide remarkable contrast before opening into deep blue blooms, creating a stunning two-tone effect throughout the flowering season. As a result, Agapanthus Dark Silk stands out beautifully among lighter flowering perennials and ornamental grasses. Furthermore, the rich flower colour adds depth and drama to summer planting schemes while attracting bees and other pollinators to the garden. The flowers are also excellent for cutting and can be enjoyed indoors in floral arrangements.
Growing Agapanthus Dark Silk
For best results, plant Agapanthus Dark Silk in full sun with fertile, well-drained soil. During the first growing season, regular watering will encourage strong root development and healthy growth. However, once established, plants become relatively drought tolerant and continue to perform reliably year after year. In addition, incorporating organic matter before planting will help improve soil structure and support abundant flowering. Full sun and good drainage will produce the best floral display.
Perfect for Borders and Containers
Whether planted in mixed perennial borders or grown in decorative patio containers, this variety provides dependable colour and architectural interest throughout summer. Meanwhile, the strong upright stems add height and structure without overwhelming neighbouring plants. Because of its dramatic colouring and elegant habit, it combines beautifully with silver foliage plants, ornamental grasses and other sun-loving perennials.
Care and Maintenance
Maintenance is straightforward and suitable for gardeners of all experience levels. Remove spent flower stems after flowering to keep plants looking tidy and encourage healthy growth. Additionally, applying a mulch in autumn can help protect roots during colder weather. With minimal attention, Agapanthus Dark Silk will provide many years of reliable garden performance and spectacular summer displays.
Related Plants and Further Information
Browse our full Agapanthus collection:
https://www.mailorderplants4me.com/product-category/agapanthus/
For expert agapanthus growing advice visit the Royal Horticultural Society:
https://www.rhs.org.uk/plants/agapanthus/growing-guide
Key Features
- Deep purple-black flower buds
- Rich inky blue flowers
- Deciduous variety
- Strong upright flower stems
- Attractive green strap-shaped foliage
- Flowers throughout summer
- Reaches approximately 60–130cm in height
- Ideal for borders and containers
- Attractive to bees and pollinators
- Easy to grow and maintain











Garry Verified Buyer
An OK performer,Nice enough but not in the stratosphere of ‘wow’ness’ that say Midnight Dreams,Royal Velvet and even Purple delight in the top Purple/Violet shades of Agapanthus specimens.
I would rate this like an opposite to Senna Agapanthus within the blue colouring Agapanthus.Same size flower heads/Flower ball,packed well with florets . A good Purple Agapanthus that starts dark,with very dark buds to lighter flowers.
ian
Thanks