Agapanthus 'Black Jack'
The ultimate dark garden gem
Grown by Mike's perennial specialists
UK
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Agapanthus 'Black Jack'
- The ultimate dark garden gem, Agapanthus 'Black Jack' produces incredibly striking buds that open to deep violet-purple flowers. This agapanthus adds a layer of moody sophistication to any sunny border.
- Boasting a phenomenal summer display, it blooms profusely from July through to September. These long-lasting globes of colour are perfect for bridging the gap between early and late summer plantings.
- It is an exceptional choice for coastal gardens, shrugging off salty winds with ease while thriving in bright, exposed conditions. You can also plant this robust perennial in large patio pots for a spectacular modern display.
- With its sturdy, upright clump-forming habit, it reaches a medium height of up to 90cm, making it ideal for the middle of a planting scheme. The lush green, strap-like leaves provide a wonderful textural base even before the flowers emerge.
- Not only is it beautiful, but it is also a magnet for pollinators and fantastic for cutting. Bringing a few stems indoors will instantly elevate your floral arrangements while the garden bees enjoy the nectar-rich blooms outside.
What to expect
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Eventual height
Eventual spread
Flower colour
Habit
Hardiness
Spacing
Will this grow in my garden?
Can I grow this in a pot?
Yes, Agapanthus 'Black Jack' is perfect for 30 cm pots, blooming spectacularly when roots are slightly constrained up to 30°C.
How big does it get?
Agapanthus 'Black Jack' typically reaches a mature height of 80 cm and a spread of 60 cm.
How much sunlight does this need?
Agapanthus 'Black Jack' requires full sun to flourish.
What kind of soil does this plant prefer?
Agapanthus 'Black Jack' prefers well-drained, loam-based soil.
How much watering does this plant need?
Water Agapanthus 'Black Jack' regularly to keep the soil evenly moist, providing about 2.5 cm of water weekly during the growing season, and slightly more when temperatures surpass 25°C.
Will this plant need pruning?
No strict pruning is required, but Agapanthus 'Black Jack' generally benefits from deadheading faded flowers to encourage further blooming and cutting back dead foliage in late autumn or early spring.
How hardy is this plant?
Agapanthus 'Black Jack' has an RHS rating of H4, withstanding temperatures down to -10°C, making it hardy through most of the UK but it may require protection in the coldest areas.
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