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Serendipity Allium

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Pre-Order for Spring of 2022 - Learn More

  • Partial Sun to Full Sun (At Least 5 Hours of Direct Sunlight)
  • Height 1 - 1.5 Feet
  • Width 10 - 15 Inches
  • Growing Zones 4-8

A time-honored addition to most informal gardens, Allium continues to be a gardener’s favorite. Large lavender umbels of flowers sway over fleshy green stalks with strap-like leaves at ground level. When you brush or squeeze any part of the plant, an onion fragrance will waft up to you, adding to their appeal in your garden. They make wonderful perennial additions to childrens’ gardens as well as wildlife gardens as bees and butterflies love them. Serendipity Ornamental Onion is a particularly prolific bloomer, sending up multiples of stalks with large flower heads rather than just one or two.

Native to temperate regions of the Northern Hemisphere, allium are hardy in Zones 4-8, growing in most of the United States except the very coldest winter regions and the very hottest summer regions. Gardeners the world over appreciate the allium family of plants, especially the ones with culinary benefits, onions and garlic, which have been used for thousands of years for food and for their medicinal benefits. Although technically all true alliums are edible, some are more suited for ornamental purposes, being either too strong, stringent or woody to be palatable. These are best enjoyed for their lovely flowers.

Serendipity Allium Care

Plant alliums in part to full sun, about 4 hours of sun is the minimum they prefer. Soil pH will be on the acidic side at 5.8 to 6.2. Use a sulphur based acidic fertilizer for best results. Alliums gain their classic onion smell from the sulphur in the soil. Water when first planted, then again during extended dry periods although alliums will tolerate some drought. Soil should be well draining to keep bulbs from rotting. Remove yellowed or damaged leaves. Deer and rabbit are not typically drawn to alliums so you shouldn’t have to worry about them browsing on them. Plant alliums outside about a week after the danger of the last frost has passed for best results.

Deadhead spent blooms to keep them from going to seed to extend the bloom season as much as possible. When the allium has ceased producing flowers, cut all spent flowers off but leave the foliage in place to garner energy from the sun. Once the foliage yellows, however, you may cut it down to the ground. Mulch with a good quality pine mulch to help soil retain its moisture and protect the roots in harsh winter regions. Although alliums produce seeds, these seeds may be viable as this is a hybridized variety. Divide clumps every three years to keep them from getting overcrowded.

Serendipity Allium Spacing

Space your alliums about 10 to 15 inches apart. These beauties will grow to about 20 inches tall and spread out to 15 inches wide. Alliums make an interesting addition to indoor flower arrangements. Plant them in masses in your landscape, in your informal cottage garden, and as an interesting thriller in your patio planters for height and that cool lavender color. You will find many ways to use alliums in your garden this spring.

Serendipity Allium Information

USDA Hardiness Zones: 4-8
Plant Type: Perennial
Sunlight Exposure: Partial Sun to Full Sun
Mature Height: 1 - 1.5 Feet
Mature Width: 10 - 15 Inches
Plant Spacing: 10 - 15 Inches
Growth Habit: Upright
Flower Color(s): Purple
Flower Shade: Rosy Purple
Seasonal Interest: Mid Summer Late Summer
Foliage Type: Herbaceous
Foliage Color(s): Blue-Green
Attracts: Bees, Butterflies
Resists: Deer, Rabbits
Tolerates: Drought
Features: Attracts Pollinators, Cut Flowers, Deadheading Not Necessary, Fragrant, Low Maintenance, Award Winner
Uses: Border Plant Container Cut Flower Mass Planting
Plant Brand: Proven Winners
Botanical/Scientific Name: Allium hybrid USPPAF, Can PBRAF

Click here for more information on plant container sizes.

Plant Addict Guarantee (Included On All Plant Orders)

Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.

For information on how to care for you new plant please check out our guide. Guide: How to Care for Your New Plant(s)

Plant Addicts Warranty - 1 Year (Extra Purchase Required)

We encourage all plant lovers to purchase the Plant Addicts Warranty whether you’re new or an expert. There are many variables outside our control and yours that can cause the demise of your plant(s). Examples would be hungry animals, drought, poor soil conditions, over watering, disease, insects & many other factors. The Plant Addicts Warranty is a 1 year warranty protecting you from all the unknowns and will replace your plant if it moves on to the plant afterlife.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant purchase. We will cover 100% of the price of the plant but the warranty does not cover shipping cost. Simply let us know if your plant has died within one year of receiving it and we’ll get you a new one shipped out. We may ask for photos for documentation purposes but again we’ll try to make it as easy as possible.

For more information, please go to our Shipping & Returns page at the bottom of the website.

Guide: How to Care for Your New Plant(s)

Planter Shipping

Standard Colors: 2-3 business days

Special Order Colors: 8 weeks - this is due to the planter being custom made with the color(s) of your choice

Please Note: On special orders there can not be any cancellations

Plant Shipping

Time of Order:

Summer Shipping

  • If there is extreme heat we’ll delay shipping.  
    • We’ll have to review what areas the plants are traveling through along with your location

Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.

It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.

2 Reviews - Serendipity Allium Show Reviews

  • 5
    Plants arrived in great shape. Can't wait until...

    Posted by Susan Gresser on Jul 4th 2021

    Plants arrived in great shape. Can't wait until they bloom.

  • 5
    Wonderful additions!

    Posted by Deanna Bartelme on May 26th 2021

    I look forward to watching my Serendipity Allium grow. The 4 plants I ordered came in perfect condition so I am encouraged that they will grow successfully.
    Thank you for your good service.