Allium caeruleum
Blue Globe Onion
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Blue Globe Onion (Allium caeruleum) - Description
Unique and lovely flax-blue clusters, 1-1/2" across, bloom in late spring. It's gorgeous as a cut flower. This delicate Allium variety may be smaller than the giants, but just as beautiful.
Blue Globe Onion (Allium caeruleum) - Blooming
Small flowers form balls on the tips of the flowering stems that are good for both fresh and dry floral arrangements.
Blue Globe Onion (Allium caeruleum) - Growth
Spring, summer, or fall flowering bulbous and rhizomatous perennials. Does well with full sun or partial shade.
Blue Globe Onion (Allium caeruleum) - Planting
Good candidate for filling in borders. Depending on the variety, can be planted via bulbs or seeds. In fall or spring plant as deep as the bulb is tall or wide, whichever is bigger. Self-seeds.
Blue Globe Onion (Allium caeruleum) - Pest
Onion fly and thrips.Like most plants that have bulbs, damp conditions makes Allium more prone to bulb rots caused by soil-borne fungi. Plants are especially vulnerable just after planting.Allium is also susceptible to white rot, mildew, fungal leaf spot (purple blotch and gray mold), and smut.
Blue Globe Onion (Allium caeruleum) - Interesting facts
Allium is a diverse genus of bulbous perennials that includes such plants as onions, garlic, chives, leeks, society garlic and giant ornamental onions. They all have relatively high concentrations of sulfur compounds which give them their unique smells and flavors. When the plant tissue is damaged some of these sulfur compounds are released, which explains why we cry when we cut onions. The sulfur compounds can dissolve in our tears, where it forms sulfuric acid. In response to the acid in our tears, we blink and produce more tears. This gives the impression that cutting onions makes us cry.
Blue Globe Onion (Allium caeruleum) - Soil and irrigation
Requires regular water during the growing season. All species need well-drained soil, especially soils on the sandy side. Keep dormant plants dry.
