'Serendipity' Allium | Ornamental Onion

Proven Winners ®

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QT 400.P403230-1
Usually ships in 1 to 3 days
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Hardiness Zone:
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Plant Status:
Actively Growing
Zones Open for Shipping:
March 2024

'Serendipity' Allium hybrid USPP 30,740Can PBRAF Ornamental Onion

Plant Facts:

Serendipity Allium Hybrid is a captivating perennial that boasts vibrant purple flowers, making it a striking choice for outdoor decor. This ornamental onion is not only a visual delight, but it is also a USPP 30,740-certified plant, ensuring its uniqueness and genetic integrity. Garden lovers searching for robust, hardy plant varieties that thrive in full sun will appreciate the resilience of these quart plant offerings. With its lush, round blooms, the Serendipity Allium adds a touch of elegance to any garden setup, serving as an ideal landscape accent. Being a plant nursery committed to quality, we present these garden onions with a plant patent, ensuring you receive a well-documented, authentic product from our online plant sales. Our gardening supplies cater to enthusiasts looking for top-tier garden plants, including allium bulbs known for their enduring nature. As a leading plant shop, we are proud to extend free shipping, letting you enjoy these perennial flowers without extra cost. The Serendipity Allium is a standout amongst full sun perennials, renowned for its ability to attract pollinators and enhance garden biodiversity. Shop with confidence knowing that PBRAF standards are met with each purchase, delivering excellence right to your doorstep.

The Serendipity Ornamental Onion, also known as Allium hybrid 'Serendipity,' is an attractive flowering plant that will delight individuals who love gardening with its exquisite beauty and easy-care characteristics. 'Serendipity' enhances any landscape with its graceful blooms and attractive foliage, adding a touch of elegance and charm.

The 'Serendipity' Ornamental Onion is a stunning and durable plant that is highly valued in garden and landscape designs. This allium hybrid will surely delight and impress with its beautiful rosy-purple flowers, low upkeep, and ability to thrive in different garden environments. By following the easy care instructions provided, you can grow a flourishing display of Serendipity in your garden, turning it into a beautiful and charming sanctuary of natural beauty.

This plant is also a part of our EZ_SCAPES "Deer Resistant Sunscape" collection.

  1. Planting Tips:

    • Choose a well-draining location with full sun to partial shade for planting Serendipity.
    • Dig a hole twice the diameter of the plant's root ball and place it at the same depth as it was in the container.
    • Space multiple plants approximately 12-18 inches apart to allow for proper air circulation.
  2. Watering:

    • Keep the soil consistently moist but not waterlogged, especially during the plant's active growing season in spring and early summer.
    • Avoid overhead watering to prevent fungal diseases, and instead, water at the base of the plant to deliver moisture directly to the roots.
    • Use our MOISTURE MAXX non-ionic wetting agent all year or during times of drought for extended help keeping your plants well hydrated for up to 40 days.

  3. Mulching:

    • Apply a layer of organic mulch, such as shredded bark or compost, around the base of the plant to help retain soil moisture, suppress weeds, and regulate soil temperature.
    • Maintain a mulch layer of 2-3 inches, ensuring it doesn't come into direct contact with the plant's stems to prevent rotting.
  4. Pruning:

    • Remove spent flower heads promptly to encourage prolonged blooming and prevent self-seeding.
    • Trim back any yellowing or withered foliage as needed to maintain the plant's aesthetic appeal and vigor.
  5. Fertilizing Guidelines:

    • Apply a balanced, slow-release fertilizer like HI-COTE 360 in spring as new growth emerges to provide essential nutrients for robust flowering and foliage development.
    • Avoid excessive fertilization, as it can lead to lush foliage at the expense of blooms.


Our processing time usually is 1-3 days after receiving the order. Orders taken after 4:00 pm on Wednesday through Sunday will be shipped the following Monday.


The Plant Factory, Inc. offers the very best shipping processes to ensure quick, safe, and near-perfect results every time. Cold and heat may deter your order temporarily until it is safe to receive and plant your plants/trees in your area. At our discretion, we will hold order till the threat is gone ensuring you with the healthiest- viable product ordered.

Summer - Above 95 degrees | Winter - Below 34 degrees

Plant Highlight

  • Growing Zone: 4-8
  • Plant Brand: Proven Winners
  • Botanical Name: 'Serendipity' Allium hybrid USPP 30,740Can PBRAF Ornamental Onion
  • Foliage Color: Dark Blue-Green and fragrant
  • Flower Color: Rosy-purple and fragrant
  • Flower Fragrance: Yes
  • Fall Color: Yes
  • Type: Perennial
  • Mature Height: 15-20" inches
  • Mature Width: 10-15" inches
  • Growth Rate: Fast 
  • Exposure: Shade to part shade
  • Soil Needs: Widely Adaptable, like organic soils best.
  • Water Needs: Occasionally, once established  
  • Pruning Needs: Divide every 2-3 years 
  • Photos: Provided by Walter's Garden
  • Awards: University of Guelph Consumer Top 10 Perennial -- 2020
  • Grown by: The Plant Factory
  • Pollinator Friendly: Yes
  • Deer Resistant: Yes
  • Pet Friendly: Yes
  • Reblooming: Yes 
  • Cold and Heat Tolerant: Yes

Note: We put pictures and videos on our site to best represent our products as an example of our quality as a grower.  You may, however, receive a smaller or larger plant than pictured depending on the season you buy. You may or may not get a plant blooming as shown on our site.  We usually trim off blooms because they do not ship well. Your purchase of our plants should be considered an investment in your future garden to enjoy the process of growing it to its full potential.

Why Shopplanyfactory.com is a good choice?

Our plants are grown at our nursery, not staged in a holding yard unattended. Our experienced staff use the best horticultural practices to ensure our plants are of the utmost health and quality. We select your plants as if we were buying them ourselves. Our standard goals are to exceed our customers expectations. We pride ourselves for great “out of the box” experiences with hassle-free customer service and quick resolutions.

Limited Conditional Warranty: Warranty is limited to guaranteeing plants will arrive safely and in good and healthy condition, and is conditioned on Seller receiving prompt notice (within 24 hours of delivery) of any problem with the condition accompanied by photo validation. No other additional, extended or long-term Warranty is expressed or implied. Minor broken branches and some leaf discoloration is considered cosmetic and normal for shipping plants through the mail. Keep in mind when if this happens these minor issues will not affect the health of your plants and trees. Loose soil does not qualify for any warranty replacement. Simply put back in container and water thoroughly, let rest for a few days and then replant.