Allium giganteum

Allium Giganteum – slightly smaller flowers allow for a tight; dense head with a good strong purple colour. Their flower heads can be up to 15cm across on exceedingly long stems reaching up to 150cm tall. As one of our tallest flowering bulbs they can stand a little wind; however to protect them they may need a sheltered spot. As ever; Allium bulbs do best in full sun in moist but well drained soil.

Their height makes them a great architectural feature but also work well in groups. A long flowering period Allium Giganteum are a great source of food for butterflies and bees.

Alliums are a perennial garden favourite, they are easy to grow and undemanding, with a great diversity of sizes, colours, textures, heights and bloom times, giving any garden long-lasting colour from early through to late Summer, followed by attractive seedheads.

Allium bulbs are tough perennials, they are related to onions, shallots and garlic and sometimes referred to as Ornamental Onions. They are hardy and easy to grow, with tall elegant stems that don’t overcrowd an area, making them a versatile addition to any garden.

Where do I plant Allium bulbs?

Allium bulbs are remarkably tough, drought-resistant, they grow best in full sun in borders.
They can be clumped together for blocks of colour, mixed in with other plants and flowers to add depth and texture.

Plant in mid-Autumn in well-composted, free-draining soil that is slightly acidic, in holes about 2 to 3 times as deep as the bulb is high. Water regularly during dry spells but take care not to over-water as this may cause the bulbs to rot.

Avoid planting allium bulbs in areas that are regularly cultivated as it is easy to damage them when digging.

How do I look after Alliums?

After flowering, you can remove the deadheads if you want, but you don’t have to as they still look attractive. Leave as many leaves as possible to allow the bulb to produce nutrients for the following season. You can leave allium bulbs in the ground, they are hardy and don’t need any special care over winter, but you can lift the bulbs if you choose. Alliums are fairly slow to multiply, any offset bulbs should be replanted immediately, although it may take a couple of years for these to mature enough to flower.