They do fine in full sun but do equally well in partial shade. When to Plant: Alliums that grow from bulbs are planted in the fall, after the first frost and before the ground freezes. It was originally selected in 2000 by Allium maven Mark McDonough. Today, they can be found growing pretty much everywhere except tropical regions and Australia.. Flowering – May to July. How to grow. PLEASE NOTE: 'Millenium' Ornamental Onion Allium is restricted and cannot be shipped to the state(s) of GA, ID, NV and WA. ‘Millenium’ Ornamental Onion is super hardy member of the Allium family. See allium cultivation advice Propagation Propagate by … These perennials over winter perfectly in containers in the nursery and they are one of the first plants to wake up in the spring. Best of all Allium 'Millenium' is a foolproof companion plant that looks great with many other summer blooming perennials. Herbaceous alliums (such as Allium tuberosum and Allium Millenium) have fiberous roots like other perennials. Its globe-shaped, rosy-purple flowers add a perky, colorful focus to your late summer garden. Plant dormant allium bulbs in the fall according to your growing zone. When planting multiple allium bulbs, the bulbs should be spaced 6 to 8 inches (15 to 20 cm) apart. The leaves generally die down before the flowers open. 15" tall x 18-22" wide (Propagated by division). This superb allium hybrid is difficult to find in the trade. Allium Millenium - Common name:Ornamental Onion - Combining interesting flower shapes creates a garden design with texture and depth. These may be planted at any time during the growing season. Plant them at a depth of 2-3 times their diameter (4-6”) in a well-drained sunny or partly-shaded site. They are hardy in zones 4 through 8. Plant the bulbs pointed-end up. Cultivation Grow in reasonably fertile, well-drained soil with full sun. Allium is remarkably resilient in a dormant state and can wait to be planted, but needs to be in the ground a few weeks before the ground freezes in order to put down roots. Dig holes about 3″ deep and 6-8″ apart. Doing so can improve drainage conditions. Like all alliums, its blooms are extremely attractive to a wide range of pollinating insects, such as bees, butterflies and hoverflies. This is really a great seller for us. The Perennial Plant Association has rightly awarded Allium Millenium the 2018 Plant of the Year®! Plant … Typically pest and disease free. Mature plants are covered in dozens of long lasting flowers. Allium is a superb flower, famous for its surprising ornamental floral scapes.. Key Allium flower facts. Plant the allium bulbs with the pointy end facing up. Consider spreading a 2-inch (5-cm) layer of agricultural grit or spent compost at the bottom of the hole before laying the bulb inside. 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