Allium Globemaster, or Ornamental onion, has showy, deep lavender, ball-shaped blooms.
A member of the amaryllis family (Amaryllidaceae), this low-maintenance perennial grows from bulbs and will provide years of pleasure.
Hardy in USDA Zones 5 to 8, Allium Globemaster reaches a height of 1.5-2.5 feet (45 to 7 cm) and produces giant balls of colourful flowers in spring.
It is a great wildlife garden plant as ornamental blooms rise up on stout stems to attract butterflies once the greyish green leaves begin to wither in mid-spring.
Globemaster Alliums photograph by Kim Carpenter.
Globemaster's flower heads may reach as much as 6-10 inches (15 to 20 cm) in diameter, making it a striking accent plant. These impressive blooms are long lasting and created from individual florets in the shape of stars.
Following blooming, flower heads dry and continue to be attractive well into the summer months.
The flower heads are also good for drying. Many gardeners immensely enjoy Allium Globemaster as a naturalized flower.
This lovely plant likes full sun but partial shade in the afternoon is a bonus on hot summer days.
It prefers a dry to medium moisture well-drained soil, and will tolerate a wide range of soil types and pH acidities. If your soil is clay, sand may be added to improve drainage.
Ornamental Onion Globemaster does not produce seeds. It is best to plant new bulbs in autumn /fall at 4-6 inches (10 to 15 cm) deep or at three times the diameter of the bulb.
Space Allium Globemaster at about 12 inches (30 cm) apart.
If you require further plants then dig bulbs of established plants to divide and replant in late summer or early fall, be sure to wait until the foliage has died down.
The Allium genus is large, with around 800 species, which includes onions, garlic, leeks, chives, and ornamental varieties.
Absolutely, many Allium species are excellent in the garden, particularly the ornamental varieties which produce vibrant, globe-shaped flower clusters.
Commonly grown species include Allium giganteum (Giant Allium), Allium hollandicum 'Purple Sensation' and Allium schoenoprasum (Chives).
Many Allium species have a distinctive onion or garlic scent when their leaves are crushed. The flowers themselves are not typically fragrant.
Allium prefers full sun and well-drained soil. They are drought tolerant and work well in many types of gardens, from vegetable to flower beds.
Some species, such as Allium vineale (Wild Garlic), can be invasive in some regions of the USA. Please check with local regulations.
Allium can be removed by digging out the bulbs. Be sure to remove all the bulbils to prevent future growth.
The Allium genus, part of the Amaryllidaceae family, includes about 800 species of bulbous perennials. Known as ornamental onions, these plants are grown for their spherical clusters of flowers in various shades of purple, pink, yellow, and white. They are also known for their distinctive onion-like scent when crushed.
Allium plants prefer full sun and well-drained soil. They are highly adaptable and can tolerate poor soil conditions. These plants are perfect for adding height and structure to a flower border or bed. In addition, they are deer resistant and attract bees and butterflies, making them beneficial for pollinator gardens.