Description
Quarantine Note: Due to quarantine restrictions, Allium bulbs cannot be sent to Tasmania.
Allium ‘Drumstick’ (Allium sphaerocephalon, family Amaryllidaceae)
Allium ‘Drumstick’ is one of the tallest ornamental onions and a striking perennial admired for its unique, drumstick-shaped flower heads. Native to Europe, North Africa, and Western Asia, it blooms from late spring through summer, adding texture and elegance to any garden. The small flower heads start green and mature to a burgundy-purple, creating a dynamic seasonal display. Slender stems carry the spherical blooms above neat clumps of blue-grey or green strappy leaves, which emerge in early spring before fading as flowers take over.
Naturally deterring pests like deer, rabbits, and rodents, they make excellent companions in the garden, while the long-lasting blooms attract bees and butterflies to support pollinators. Hardy, low-maintenance, and drought-tolerant once established, Drumstick Alliums are perfect for gardeners seeking a bold yet easy-care addition to the landscape.
Where to Plant
Best planted in mixed borders, rockeries, or raised beds where their tall stems and unique blooms can stand out. Choose a spot protected from strong winds to keep the slender stems upright.
They look especially striking in clumps, naturalising gradually into tidy groups that suit both large and smaller spaces. These areas are also ideal because they keep expansion contained and growth manageable.
While they can be grown in containers for short-term displays, they perform best in open ground where bulbs have room to establish. The distinctive flower heads also make excellent cut blooms, adding drama and long-lasting colour to floral arrangements.
Companion Planting
Alliums naturalise gradually into tidy clumps that suit both large and small gardens. They are especially effective in mixed borders with other perennials, including late-blooming tulips, irises, daylilies, and ornamental grasses. These companions provide colour and texture while also helping to disguise the Allium foliage as it fades, ensuring the display remains cohesive and attractive throughout the season.
Climate Suitability
Allium Drumstick grows well across cool to subtropical climates. It thrives in sunny, well-drained positions and benefits from cold winters, which help bulbs establish and set up for strong flowering in spring. In warmer regions, planting later in the season when the soil has cooled ensures good establishment.
When to Plant
Plant bulbs in autumn, from April to June. Alliums grow best when planted in cool soil and given time to develop roots before the heat of summer. In cooler regions, earlier planting is recommended so bulbs can establish before winter. In warmer areas, wait until after the summer heat has passed and the soil has cooled for the best results.
Location
Choose a spot in full sun with at least six hours of direct light daily. Borders, rock gardens, or raised beds are ideal, ensuring bulbs remain in free-draining soil that prevents waterlogging.
Soil
Drumstick Alliums prefer light, free-draining soil with a near-neutral pH. Improve fertility by incorporating compost or a small amount of complete granular fertiliser or well-broken-down manure before planting.
How to Plant
Plant bulbs 8–10 cm deep, spacing about 10 cm apart. Place the pointed end of the bulb facing upwards, backfill with soil, and water well to settle them in.
Watering
Water deeply after planting to encourage root development. During the flowering period, maintain even moisture but avoid overwatering. Once flowering has finished and foliage begins to die back, reduce watering to prevent bulb rot.
Fertilising
Apply a complete granular fertiliser at planting time and again as buds begin to form. Fertiliser can also be applied annually just before new growth emerges, using either a complete or a bulb fertiliser to encourage healthy development. Avoid high-nitrogen fertilisers, which encourage excessive foliage over blooms.
Mulching
Apply mulch around the base of the plants to retain soil moisture, suppress weeds, and regulate soil temperature. Organic mulches such as straw or sugarcane are ideal.
Maintenance
Remove spent flowers to prevent seed formation and help bulbs store energy for the next season. Allow the foliage to die back naturally, as this process enables the bulbs to store energy. Only cut back once the leaves have fully yellowed and the blooms have faded. Planting among perennials or ornamental grasses can help disguise fading foliage for a cohesive display.
Division and Storage
Alliums are slow to multiply and can be left undisturbed for many years. If clumps become overcrowded, lift and separate the bulbs once both the foliage and blooms have completely died back. After lifting, bulbs can be replanted immediately or stored in a cool, dry, well-ventilated location out of direct sunlight, using breathable containers such as mesh bags. Replant before the end of the planting season, typically in late autumn.
Pests and Diseases
Alliums are generally pest-resistant, partly due to the sulphur they produce. Slugs and snails may occasionally damage young shoots, but these can be deterred with barriers such as diatomaceous earth or organic traps. Ensure good drainage to reduce the risk of bulb rot.
Safety
Alliums are not listed as toxic to humans or pets, though, as members of the allium family, a degree of caution is sensible. Bulbs should be kept out of reach of children and animals, and gloves are recommended when handling, particularly for those with sensitive skin. Seek medical advice if accidental ingestion occurs.
Supplied as dormant bulbs.