Allium Gladiator, also known as a flowering onion, is a flowering perennial that grows in temperate regions and blooms through May and June. It is a cultivated hybrid of the onion family and has received awards from the Royal Horticultural Society.
The plant produces stems between 3 and 4 feet tall topped with a large blue-lavender ball approximately 5 to 6 inches in diameter. The flowers produce a slightly pungent aroma that repels rodents and deer. These alliums do best when planted in full sun and are assigned to winter heartiness zones 4 through 7 in the Southeast and zones 4 through 8 in the West. The plant requires well-drained soil, resists disease and is extremely drought-tolerant. The color of flowers ranges from lavender-blue to deep purple. Allium Gladiator makes an excellent border plant due to its height and upright structure.