'Globemaster' Giant Allium
Bulbs
- Long-lasting, massive 8-10” purple blooms!
- Upright habit reaching up to 4’ tall.
- Deer & rabbit resistant, overall low-maintenance.
- Perfect for cut flower arrangements.
- Zones 4-9, sun/part sun, up to 36-48” tall x 10” wide at maturity.
UNABLE TO SHIP TO: WA, OR, IN, ID, CANADA
ZONE
EXPOSURE
HEIGHT
Description
The best time to plant allium bulbs is in the fall, about 6 weeks before the ground freezes. This allows time for the bulbs to establish hardy root systems before entering dormancy, ensuring healthy and vibrant blooms come spring. If holding allium bulbs for any length of time, keep cool and dry in a dark location.
Details
Common name: Ornamental Onion, Giant Allium
Zones: 4 - 9
Sun exposure: Full sun to part shade
Height x width: 36-48” x 10”
Flower color: Purple
Foliage color: Green
Planting Time: Fall
Season of Interest: Summer
Bloom Time: Summer
Features: Low-maintenance, spring interest, cut flower, container-friendly, cold-tolerant
Uses: Cut flower gardens, landscaping, specimen, flowering hedge, containers, rainbow gardens, cottage gardening, pollinator garden
How to Grow
Light: Full sun (6+ hrs/day) to part sun (4-6 hrs/day)
Water: Average water needs. Water deeply after planting then leave alone until spring.
Planting Depth: 6”
Spacing: 5-6"
Fertilizing: Fertilize at planting with slow-release fertilizer.
Winterizing: No special winter requirements.
Plant spacing is based on the ultimate width of the plants. This figure is normally given as a range; for example, 3-5’. If you live in a cold climate and/or want plants to fill in more quickly, plan to space at the shorter end of the range. If you live in a warm climate, are on a limited budget, or are willing to wait longer for plants to touch, use the higher end of the range. Using the larger number is recommended when calculating distance from a building or structure. There’s really no such thing as "maximum spacing": if you don’t want your plants to touch, you can space them as far apart as you’d like. All plant spacing is calculated on center, or in other words, the centers of the plants are spaced one half of their eventual width apart:
Unless you are planting in a straight line, as you might for hedges or edging, space your plants in a staggered or zig-zag pattern for a more interesting and naturalistic look:
Not sure just how many plants will fit in your garden? Our calculator gives you the exact amount of plants required for your space. Simply update the values and the calculator will re-calculate accordingly. Spacing information can be found in the 'How to Grow' tab on each plant's page.