I am a landscape designer and have been purchasing 1000's of spring flowering bulbs from A.D.R. Bulbs for 100's of clients in the last 20 years. The bulbs have always been of top quality and if there were any problems, they have been quick to rectify. My orders are often complicated with many varieties and different amounts and they have always filled and delivered everything on time with the best customer care and attention to detail.  The pictures in their catalog and website are beautiful. I have visited their facility in NY and was impressed with all their handling equipment and organization.  I would highly recommend A.D.R. Bulbs to anyone in the wholesale trade who wants to purchase quality bulbs and work with genuinely nice people.

Nancy Greenlee , From The Ground Up

« Previous Plant  |  Next Plant »

Allium Giant 'Gladiator'

Ornamental Onion

Allium 'Gladiator' reaches 3 to 4 feet, showcasing 6-inch globe-shaped reddish-purple blooms from late spring to early summer. Thriving in full sun and well-drained soil, it is drought-tolerant, deer-resistant, and attracts pollinators. Its sturdy stems ensure lasting ornamental appeal. Ideal for borders, it pairs well with peonies and irises.

Description Price
10 Retail Packages of 1 Bulb, Size 20/+ cm $31.20
Get Notified When Back In Stock

Complete this form and we'll notify you when SKU RET6031110 is restocked.

Email:
Needed By:
Qty Requested:
Bin Display Box of 20 Bulbs, Size 20/+ cm $51.40
Get Notified When Back In Stock

Complete this form and we'll notify you when SKU BIN6310040 is restocked.

Email:
Needed By:
Qty Requested:
Bulk Tray of 100 Bulbs, Size 20/+ cm $230.00
Get Notified When Back In Stock

Complete this form and we'll notify you when SKU BUL35129020 is restocked.

Email:
Needed By:
Qty Requested:
Allium Calculator
Fill out the dimensions below to determine how much product is required for planting.
When should I plant Allium Giant 'Gladiator'?
Fall Planting Schedule
Growing and Maintenance Tips for Allium Giant 'Gladiator'

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.

Great Companions for Allium