I’ve been purchasing bulbs from A.D.R. for many years. The quality is superior and the service fantastic. Chris and his family have always been prompt and accommodating. If you need it, Chris can find it! I wouldn’t shop anywhere else!

Anna Myatt , Myatt Landscaping

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Allium Miniature 'Cowanii'

Ornamental Onion

Allium cowanii reaches 16 to 24 inches tall, featuring 2 inch loose clusters of glistening white florets with ivory-green anthers. Blooming in late spring, it thrives in full sun and well-drained soil, showing drought tolerance and strong resistance to deer and rabbits while attracting pollinators. Its airy blooms create a delicate yet striking presence in borders, rock gardens, and mixed plantings.

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When should I plant Allium Miniature 'Cowanii'?

Growing and Maintenance Tips for Allium Miniature 'Cowanii'

Timing: Plant in fall before the ground freezes to ensure proper root development. Ideal soil temperature for planting is 60°F or colder.
Location: Choose a sunny, well-drained spot—poor drainage can cause bulb rot.
Depth & Spacing: Bury bulbs two to three times their height and space them six to twelve inches apart for optimal growth.
Soil: Maintain a pH of 6 to 7 and enrich with organic matter for better drainage.
Watering: Keep soil moist but not soggy during initial growth; once established, alliums are drought-tolerant.
Foliage Management: Leaves yellow after blooming—plant among perennials to disguise fading foliage.
Deadheading: Remove spent flowers to prevent self-seeding unless you want naturalized clusters.
Fertilization: Apply a balanced fertilizer in early spring to support strong blooms.
Pest & Disease Resistance: Alliums are deer and rabbit resistant but avoid planting in areas with excessive moisture to prevent fungal issues.
Crop Rotation: Change planting locations yearly to prevent soil-borne diseases.