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Blue Globe Onion (Allium caeruleum): Rare True Blue Flowers for Early Summer

Allium caeruleum

Overview

Blue globe onion (Allium caeruleum) produces dense clusters of bright blue flowerheads up to 1 inch wide on 1-3 foot stems. Leaves clasp the stem and die back before flowering. A rare true blue in the bulb world.

Botanical Details

Genus: Allium
Species: caeruleum

Culture & Uses

Full sun, well-drained, average to dry soil. Sow seed in spring; divide clumps in spring. Bulb rot in damp conditions; onion fly, thrips. Showy flowers and seed heads. Use in beds, borders, cottage gardens, meadow gardens, rock gardens. Height 1-3 feet.

Other: Stars of Persia (Allium christophii): Huge, Metallic Fuchsia Spheres for Early Summer; Giant Onion (Allium giganteum): Towering Lilac-Pink Globes for Summer Borders; Chives (Allium schoenoprasum): Edible, Pom-Pom Flowers for Herb and Cottage Gardens; Ornamental Onion (Allium senescens): Twisty Foliage and Pink Summer Blooms; Drumstick Allium (Allium sphaerocephalon): Color-Changing Blooms for the Summer Garden; Japanese Onion (Allium thunbergii): Late-Season Blooms That Defy Frost; Chinese Chives (Allium tuberosum): Edible Leaves and Late Summer Flowers; Blue Pimpernel (Anagallis monellii): Low-Growing Carpet of Deep Blue Flowers; Hosta 'Blue Shadows' (Hosta 'Blue Shadows'): Medium Blue Variegated Hostas; Trachelium caeruleum (Blue Throatwort): Long-Blooming Cut Flower

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Blue Globe Onion (Allium caeruleum): Rare True Blue Flowers for Early Summer

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