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Dark Knight Sweet Alyssum

$14.99
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Pre-Order for Spring of 2022 - Learn More

$14.99
  • Height 8-12 Inches
  • Width 18-24 Inches
  • Use as a spiller when using in containers
  • Sweet fragrant deep purple flowers!

Many gardeners turn to Sweet Alyssum for early spring color, and Dark Knight™ Sweet Alyssum can certainly fit the bill for brightening the dull days before most flowers begin their bloom. However, this variety will bloom all summer, which sets it far apart from the pack. The sweetly fragrant flowers are a deep shade of purple that pops against the medium-green foliage. Bees and butterflies flock to the masses of ever-blooming flowers, as well. and Dark Knight™ Sweet Alyssum is a hardy annual that blooms until the first hard frost, so they provide the fall interest that is much-needed in most gardens and containers.

You can expect your Sweet Alyssum to be a dependable trailing “spiller” in your container plantings. They can trail up to 24” in a container. Plus, they offer a constant show of color when planted in the garden as an annual border plant or groundcover. Both cold- and heat-tolerant, you’ll notice that your Dark Knight™ Sweet Alyssum is a dependable bloomer from early spring until fall. If you have a sunny space in need of color, give this beauty a try.

Dark Knight Sweet Alyssum Care

Dark Knight™ Sweet Alyssum doesn’t require deadheading and can withstand a variety of spring, summer and fall temperatures. However, it does require regular watering. Because of its water needs, try planting in a larger planter that will not dry out as quickly as a smaller one. Maximize container performance with regular applications of a balanced, water-soluble fertilizer starting in mid-summer. An annual application of compost or fertilizer will do for Sweet Alyssum planted in garden beds.

Dark Knight Sweet Alyssum Spacing

Opt for larger containers for your Sweet Alyssum to ensure maximum water retention. Container plant spacing should be 6 to 8”. When using as an annual groundcover or border plant, allow for 12-18” of space between plants.

Dark Knight Sweet Alyssum Information

USDA Hardiness Zones: 9-11
Flower Color(s): Purple
Flower Description: Deep Purple
Bloom Period: Planting To Hard Frost
Foliage Color(s) Green
Light Exposure: Partial Sun to Full Sun
Height Class: Short
Height: 8-12 Inches
Spread: 18-24 Inches
Spacing: 12-18 Inches
Habit: Trailing
Watering: Average
Drought Tolerant: No
Attracts: Bees, Butterflies
Container Role: Spiller
Use Types: Border Plant, Container, Edging Plant, Groundcover, Hanging Baskets, Landscape, Mass Planting
Features: Fall Interest, Continuous Bloom or Rebloomer, Fragrant, Deadheading Not Necessary, Pollinator Attractor
Maintenance: Easy
Scientific Name: Lobularia hybrid 'INLOBU1007' USPP 26,931, Can PBRAF
Common Name: Dark Knight Sweet Alyssum
Other Name(s):
Plant Type: Annual
Brand: Proven Winners

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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.