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Agapanthus Blackjack
(African Lily)


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Great for wildlife
July - September
100cm x 50cm
Award Winner
Half Hardy

It’s time to bet on black! Agapanthus Blackjack is a brand new variety that’s sure to be a winner in any garden with its stunningly dark purple flowers on long, evergreen stems.

Additional information

Plant Type
Flowering Period
Flower Colour
Fully Grown Size
Garden Position
Light Level
RHS Plants For Pollinators
RHS Garden Merit Award
Pot Size


Agapanthus Blackjack is a brand new variety of Agapanthus that has been bred to bear flowers of a very deep purple colour, that are inky and almost black when in bud which creates a stunning effect even before they've started flowering. These flowers are held on stems up to around 60cm tall, protruding from foliage composed of long, thin, evergreen leaves. In addition to this perennial's stunning looks, it's also very low maintenance and drought tolerant, and are also not typically prone to any pests or disease meaning they can continue to show their impressive floral displays without any hassle. Agapanthus look great potted, which is also good for their growth as they produce more flowers when their roots are constricted in a container, so if you've got an empty spot on the patio in need of some striking colour then this variety may be perfect for you. If longevity is what you're looking for then Agapanthus may also be a great option as they come back year after year. This particular variety is hardy down to -10 degrees Celsius and so will continue to impress in it's subsequent years!

Planting Conditions

This plant should be planted in moist, well drained soil, composed of sand, loam, clay or chalk. The pH of the soil is not important for an Agapanthus, but they'll need to be planted in a sheltered spot that has at least 6 hours of sunlight a day. They will grow very well when potted, as when their roots are restricted they will perform better, although they can perform well in a flower bed provided the soil they're planted in doesn't get too waterlogged.

Watering & Feeding

Agapanthus require less water than most other perennials, and so need little watering and so need to be planted in well drained soil to ensure they don't stay wet, especially during the winter months. They should be watered once or twice a week, if the top inch or so of soil around the plant is dry then they're ready to be watered. The should be fertilised in Spring and Summer, and any fertiliser with a 1-2-1 ratio should work well with them.

General Care

Agapanthus require little maintenance as they need very little water and don't require extensive means to avoid disease and pests. They will need protecting in the Winter where the frost can kill them if they aren't in a greenhouse. When planting, a hole twice the size of the pot should be dug and the plant placed into it, filling in the remaining area in with compost. A 3 inch layer of mulch should then be applied around the base of the plant, and it should then be watered to keep the soil moist while it establishes in its new spot.