Allium 'nigrum'

Where to Plant:

Despite its name, which translates to 'black allium', this plant produces elegant domes of creamy-white flowers, each with a contrasting dark green eye. For the best performance and strongest stems, choose a location that receives full sun. It is essential to provide well-drained soil, as the bulbs can rot in wet winter conditions. This tall, stately allium is perfect for adding height and a touch of class to the middle or back of a border, where it mixes beautifully with grasses and other perennials. It also makes a superb, long-lasting cut flower.

How to Plant:

The ideal time to plant these bulbs is in the autumn, from September through November. Plant each bulb with the pointed tip facing upwards, to a depth of around 15cm, or approximately three to four times the bulb's own height. This deep planting helps to anchor the tall flower stem. Space the bulbs about 20-25cm apart to give them enough room to mature and to allow the individual flower heads to be appreciated. Planting in bold groups of five or more will create a far more impactful display.

Aftercare:

This is a very self-sufficient plant once established. After the flowers fade, allow the strap-like foliage to wither and die back naturally. Do not be tempted to cut it off while it is still green, as this is a vital time when the plant sends energy back to the bulb for the following year's bloom. The dried seed heads remain decorative for some time and can be left on the plant to provide extended structural interest in the garden.