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:
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DescriptionAllium 'Millenium' adds a touch of whimsy to perennial gardens! Globe-shaped rosy-purple flowers add playful texture for several weeks in summer. These plants are as reliable as they are charming, adapting to various soil types, tolerant to heat, and resisting deer and rabbits.
Related to the onion, allium's clumps of glossy green foliage emit an onion-like fragrance when crushed. Butterflies and honeybees adore these purple beauties, and we're sure you too will enjoy this practically perfect perennial! Plant alone or in groups for a show-stopping display in your flower garden.DetailsBotanical name:Allium 'Millenium' Common name: Ornamental Onion, Allium Zone: 4 - 8 Sun exposure: Sun (6+ hours sun) to part sun (4-6 hours sun) Height x width: 15-20" x 10-15" Flower color: Purple Foliage color: Blue-green Season of Interest: Mid-Late summer Uses: Edging, Flower gardens, Wildlife gardens, Pollinator gardens, Cut flower, Accent, Mass plantingHow To GrowSoil: Thrives in any type of soil. Light: Full sun (6+ hrs/day) to part sun (4-6 hrs/day) Water: Low to average. Tolerates drought once established, though blooming may be somewhat compromised. Spacing: 15 inches apart Fertilizing: Not required. If more rapid growth is desired, apply a rose or all-purpose garden fertilizer in early spring. Winterizing: No special winter requirements. Maintenance & Pruning: Pruning is not required, as plants die back to the ground in winter.