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Agapanthus Midnight Sky
(African Lily)


July - September
80cm x 70cm
Cut Flowers
Half Hardy

The elegance of a night’s sky in the middle of a summer’s day – Agapanthus Midnight Sky is the best Agapanthus for anyone looking to bring some dark colour into the summer.

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 Midnight Sky; If you were looking for that perfect, really dark blueish purple Agapanthus to add some contrast to a border or turn heads on the patio, then you've found your variety! Agapanthus Midnight Sky is an absolutely stunning plant, growing as a deep green mound of foliage, and extending to the skies with long evergreen stems and topped with huge flower heads bearing dozens of deep, dark blue, trumpet shaped blooms throughout Summer to early Autumn. Your neighbours won't be the only ones taken aback by their striking features - bees and other pollinators love to crawl into their flowers, making Agapanthus a great choice for anyone looking to introduce or maintain wildlife in the garden. As the name might suggest, these Agapanthus reach for the skies - growing up to a meter and a half tall, this variety will dominate beds and borders, and will absolutely be the star of the show when potted. Despite their impressive display of flowers, Agapanthus are generally quite low maintenance, needing little water or pest and disease control as they are quite resistant to these too.

Planting Conditions

Agapanthus like moist but well drained soil, made from clay, sand, chalk or loam, at any pH. They should be planted in a sunny spot with at least 6 hours of sunlight a day, and that spot should be sheltered to ensure their best performance. When potted, Agapanthus are more floriferous, however they can work well planted in a bed or border too as long as the soil is freely draining.

Watering & Feeding

Agapanthus love being a little more on the dry side than most perennials, meaning they won't need watering as often as other plants in the garden. Because of this, they should also be planted in soil that drains well - and this watering can be performed once or twice a week. If you're wondering when they should be watered in their flowering season, check the top inch of soil, as if it's dry then they could do with a water. They should be fertilised with a fertiliser of a 1-2-1 ratio, mainly in Spring and Summer.

General Care

Agapanthus are low maintenance plants overall which makes them perfect for newer gardeners. They won't survive through a cold Winter outside and so will need protecting in a greenhouse throughout the months where frost is a risk. When you come to plant your Agapanthus, dig a hole twice the size of the pot, place the plant in and fill in the rest with compost. A roughly 3 inch layer of mulch should then be applied around the base of the plant, and then watered until the soil is saturated to make sure that the plant will establish in its new location well.