Alliums, also called ornamental onions, ignite floral fireworks in the garden. The spherical blooms spark conversation and add drama to planting beds. Each allium flower head features many small, individual blooms that attract pollinators by the dozens.
Like daffodils, alliums are perennial bulbs. Planted in fall in the Mid-Atlantic, ornamental onion bulbs bloom the following spring and return year after year. These hardy onion cousins are some of my favorite bulbs. Here's why.
Ornamental onions appear early in the season. Last February this trio of black garlic (Allium nigrum) survived late-winter snows.
Even with flower buds fully visible, alliums have weathered hard freezes in my Mid-Atlantic garden.
And while many early perennials prove easy targets for deer and rabbits, alliums - loaded with onion flavor - don't appeal to wildlife.
Easy to Use
You don't need a design degree to create beautiful plantings with ornamental onions. Plant bulbs in groups of three and you're guaranteed a gorgeous show.
Purple Sensation (Allium aflatunense), is one of the earliest large-flowered alliums, opening buds in mid- to late May.
Ornamental onions combine easily with other plants. You even can position different alliums together, like this 'Raspberry & Cream' allium blend.
You also can pair alliums with perennials such as roses, campanula, lady's mantle or centranthus.
Count on alliums for a season-long display. Flowers fade to form dry, stiff seed heads that linger well into fall.
Some gardeners spray-paint seed heads to create striking orbs of color. I let my alliums age naturally. I've had seed heads remain through early-winter snows.
My Favorite Alliums
I grow the following alliums (bloom times in parentheses):
- ‘Purple Sensation’ (mid- to late May)
- ‘Globemaster’ (mid-May to early June)
- Star-of-Persia (late May to early June) –See photos in my blog about a garden path.
- ‘Raspberry & Cream’, which includes black garlic (late May to early June)
What are some of your favorite bulbs?