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Allium hybrida 'Millenium' is a perennial ornamental onion known for its striking, round clusters of small, vibrant purple flowers. These globular blooms appear in late summer and are highly attractive to pollinators, making it a great addition to pollinator gardens. With its sturdy, upright stems and attractive foliage, 'Millenium' adds texture and color to garden beds, borders, and containers.
Description:
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Dimensions: 18–24 in. tall × 12–18 in. wide
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Sun Exposure: Full sun
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Water Requirements: Well-drained soil; water regularly but ensure soil does not stay soggy
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Hardiness Zones: USDA Zones 4–8
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Bloom Time: Late summer (July–August)
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Pruning: Cut back spent blooms to encourage neat growth; foliage dies back in fall
How to Plant:
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Location: Garden beds, borders, or containers
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Soil Preparation: Prefers well-drained, fertile soil; amend with compost if soil is heavy
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Planting: Plant bulbs 4–6 inches deep, 6–8 inches apart, in a sunny spot
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Watering: Water regularly during growing season, but allow soil to dry out between waterings to avoid root rot
Fun Fact:
Allium 'Millenium' is a long-blooming variety and a low-maintenance plant, making it perfect for gardeners looking for a reliable performer with little fuss. Its flower clusters, often compared to fireworks, last for weeks and are great for cutting into fresh arrangements.