SEARCH
MENU
  • About
  • Subscribe
  • Shop
Creative & Frugal Home & Garden Ideas

Empress of Dirt

  • Grow
  • Make
  • Ideas

New here?

Dig in!

Start here

How to Grow Ornamental Alliums (Bees Love These Spring Blooms)

Published on January 26, 2018Last updated November 18, 2021 ♛ By Melissa J. Will

This post contains affiliate links.
Read full disclosure statement here.

Share on TwitterShare on FacebookShare on PinterestShare on Email

Alliums are those gorgeous flowering perennials in the spring garden with the big, round purple flower heads on tall, green stems. Planted from bulbs in fall, they are easy to grow, attract bees and butterflies, and (bonus) deer and rabbits don’t like them.

This is part of my Best Flowering Plants for a Cottage-Style Garden series.

Purple allium flower with bee.

Growing Alliums

Alliums are those gorgeous flowering perennials in the spring garden with the big, round purple flower heads on tall, green stems. They are easy to grow, attract bees and butterflies, and deer and rabbits don't like them.
Pink peonies and purple alliums

Ornamental Allium | Genus: Allium

Purple allium flowers in garden.

Allium Growing Guide
Herbaceous geophyte perennial with true bulbs

• Zones 3 to 9
• Full sun to part shade
• Same botanical genus as onions, leeks, garlic and more

Shop Online: Buy allium bulbs (US shipping)

I love alliums in spring and so do the bees! Just as the early spring tulips and daffodils are finishing up, it’s allium time.

There’s nothing quite like these tall, bold flowering plants with their giant purple flower heads.

As winter fades out, there are few food sources available, and the bees go wild for them, marking the transition to the warm growing season.

Alliums are bulb plants. Planted in fall, they will flower in spring, and provide blooms for several years to come.

The bulbs will gradually multiply, and the original bulbs will gradually weaken or die off.

At some point you may need to divide the bulbs to give the babies adequate growing space.

Allium flowers also produce seeds, which may sprout in the garden as well.

I’ve certainly found that alliums spread around my garden (which I love), but I’m not entirely sure if it was by seed or bulb, or, more specifically, from squirrels digging them up and moving them.

Allium Facts & Growing Tips

How to Plant Ornamental Allium Bulbs

Alliums are those gorgeous flowering perennials in the spring garden with the big, round purple flower heads on tall, green stems. They are easy to grow, attract bees and butterflies, and deer and rabbits don't like them.

The best time to plant allium bulbs is in fall after your first frost but before the ground is frozen.

Follow the directions on your bulb pack or plant at a depth 3x the size of the bulb. If the bulb is 2-inches tall, plant it 6-inches deep.

Choose a location with sun or part-sun in spring.

As with any bulbs, ornamental alliums need well-draining soil because they rot if waterlogged.

Alliums bloom in spring. Allow foliage to die off after blooming—this is when the plant replenishes its energy for the next blooming cycle.

You can divide the bulbs any time the ground is workable. It’s recommended to do so before or after flowering so you don’t disrupt the flower cycle.

How to Sow Ornamental Allium Seeds

Alliums are those gorgeous flowering perennials in the spring garden with the big, round purple flower heads on tall, green stems. They are easy to grow, attract bees and butterflies, and deer and rabbits don't like them.
Allium turning to seed after flowering

Allium seeds are slow growing—that’s why it’s more common to grow from established bulbs. It can take years from seed to flower.

If your seeds come from a cultivar in your garden, they may not grow flowers true to type but it’s always fun to see what you get.

Some species need cold stratification to germinate. This would occur naturally in a cold climate garden.

In your home, you can use the method shown here for delphinium seeds.

If you don’t know if they need stratification, try a germination test first to see if the seeds will sprout without this process.

Alliums naturally disperse their seeds in fall, winter, and spring. Seed packets recommend sowing after last frost in spring. Be sure to mark the location with long-lasting plant tags since growth will take several years.

Allium Plant Facts

Family: Amaryllidaceae

Genus: Allium

Common Name: Allium, Ornamental Allium

USDA Hardiness Zones: 3 to 8

Cultivars: Between 200-900, depending on how it they are categorized; the taxonomy of allium is poorly understood

Origin: Northern hemisphere, Asia, Africa, South and Central America

Type: Herbaceous geophyte perennial with true bulbs

Height: 5-150 cm (up to 60 inches: 5 feet tall)

Light: Full sun to partial shade

Soil: Well-drained soil

Flower Times: Late spring to early summer

Colors: Light to dark purple, some are reddish-purple

Fertilizer: Depends on your soil—get a soil test to learn any nutritional needs

Attracts: Bees and butterflies

Avoided by: Deer and rabbits

Propagation: Plant bulbs in fall after first frost but before ground freezes

Planting depth: 3x the height of bulb

After blooming: Allow foliage to die off naturally as it provides fuel for next year’s growth. Seed heads (old, dry flowers) look lovely in winter garden.

Divide bulbs: Before or after flowering.

Toxicity: None known. Ornamental alliums are related to edible onions. Research first.

Trivia: The word allium is Latin for garlic. Allium sativum means ‘cultivated garlic‘.  Some alliums are edible; some are strictly ornamental. The pungency of edible alliums is determined by the sulfate content of the soil: the more there is, the stronger the flavor.

Find Your Frost Dates & Hardiness Zone

  • Plant Hardiness Zones | United States flag United States | Canadian flag Canada
    These are listed on seed packets and plant tags to guide your choices.
  • Average Frost Dates | Use this calculator at Almanac.com. Enter your city and state or province to find your first and last frost dates and number of frost-free days.
  • Tips: Understanding Frosts & Freezing For Gardeners

Have onions stored in your kitchen sprouted?
See how to regrow them.

DIY Garden Art Alliums

Make giant garden art alliums from thrift shop materials.

This craft project is made from recycled items including old nails and a softball. Follow the tutorial to make decorative alliums for your garden.

How to Make Garden Art Alliums

~Melissa the Empress of Dirt ♛

Purple allium flower with bee.
Share on TwitterShare on FacebookShare on PinterestShare on Email

FREE NEWSLETTER

EVERY TWO WEEKS

Creative, frugal home and (mostly) garden ideas in your inbox!



Privacy Policy



Listen to Our Garden Podcast

SUBSCRIBE TO PODCAST HERE

Melissa J. Will - Empress of DirtWelcome!
I’m Melissa J. Will a.k.a. the Empress of Dirt (Ontario, Canada).
Join me as I share creative + frugal home & garden ideas with a dash of humor.
More: Contact/About
New here? Dig in!  |  Our Podcast

DISCLOSURE STATEMENT

Some articles on this site contain affiliate links. As an Amazon Associate I earn from qualifying purchases.
Affiliate and Ad Disclosure | Privacy Policy

Copyright © 2022 · Empress of Dirt Creative + Frugal Home & Garden Ideas