For the past ten years, we've had the good fortune of ordering thousands of bulbs from A.D.R. each fall to help further beautify Newport, RI. Not only is the quality of the bulbs outstanding, so is their customer service and attention to detail.

John Hirschboeck , Daffodillion

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Allium Tall 'Nigrum'

Multibulbosum

Allium nigrum, also known as black garlic or broad-leaved leek, reaches 18 to 24 inches tall, featuring 3 to 4 inch flat clusters of creamy-white to pale lilac star-shaped florets with green centers. Blooming in late spring to early summer, it thrives in full sun and well-drained soil, showing drought tolerance and strong resistance to deer while attracting pollinators. Native to the Middle East, it has naturalized in parts of the United States. Ideal for borders and mixed plantings, it pairs beautifully with peonies and irises.

Bin Display Box of 100 Bulbs, Size 12+

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When should I plant Allium Tall 'Nigrum'?

Growing and Maintenance Tips for Allium Tall 'Nigrum'

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.