Giant alliums can grow up to 4 feet tall, making them a stunning addition to any garden.
These towering flowers are a type of ornamental onion that requires well-draining soil to prevent root rot.
Plant giant alliums in the fall, about 6-8 weeks before the first frost, for the best results.
They thrive in zones 4-9, where the winters are cold enough to force the bulbs into dormancy.
Types of Allium
Ornamental onions come in a wide range of flower shapes and sizes, varying from the huge Allium Ambassador to the low growing Allium Moly.
Gladiator is a spectacular giant ornamental onion with enormous globe-shaped flowers and tall stems of up to 50 inches.
Allium bulbs are perfect for naturalizing, provided they are planted in well-drained soil.
Their scent keeps rodents and deer at a distance, making them a great choice for gardens with unwanted wildlife visitors.
Wholesale Allium bulbs flower late in Spring and combine well with perennials.
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Planting and Care
Plant giant allium bulbs in the fall, about 6-8 inches deep and 4-6 inches apart, to allow for proper growth and blooming.
To ensure good drainage, plant them in well-draining soil with a slightly acidic pH between 6.0 and 7.0.
Giant alliums require full sun and dry to medium moisture, making them suitable for areas with low rainfall.
Water them sparingly, allowing the soil to dry out slightly between waterings, to prevent rot and other issues.
Fertilize them with a low-nitrogen, high-potassium fertilizer in the spring, after they have finished blooming.
Deadheading the flowers can encourage a second bloom, but it's not necessary for their overall health and growth.
After blooming, allow the foliage to die back naturally, as it will provide nutrients to the bulb for next year's growth.
Recommended read: Allium Giganteum Bulbs When to Plant
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