Sweet Alyssum
Lobularia maritima
Sweet alyssum is one of the most effective beneficial-insect attractants in a vegetable garden — a single 6-inch border around a tomato bed attracts enough parasitic wasps and hoverflies to reduce aphid pressure by 50%.
How to care for sweet alyssum
Shear back by half mid-summer when blooms slow — fresh growth and a new flush appears in 2 weeks. Honey-scented blossoms attract beneficial insects, making this a top companion in vegetable gardens.
Garden uses & design ideas
Best garden use
Use it where you want fast seasonal color in containers, walkway edges, or gaps between slower permanent plants.
Pair it with
Pansy, Petunia, Snapdragon make easy companion choices because they share similar light, water, or visual texture needs.
Layout tip
Match it with full sun exposure, place it in a moderate-water bed where soil can stay evenly damp but not soggy, and check USDA zones 5-9 (annual in most zones) before planting. Use the garden planner to test spacing around its mature size: 3-6 in tall, 8-12 in wide.
Gardener note — Double-check local invasive, edible, and toxicity guidance with your county extension office before planting around pets, children, or natural areas.
Companion plants
Sweet Alyssum grows well alongside these — similar light, water, and texture needs.
Common pests & problems
Where it grows best
Native to Mediterranean basin; thrives in USDA hardiness zones 5-9 (annual in most zones).
Frequently asked about sweet alyssum
What USDA zones does Sweet Alyssum grow in?+
Sweet Alyssum is hardy in USDA zones 5-9 (annual in most zones). Outside these zones, it can usually be grown indoors or as a seasonal annual.
How much sun does Sweet Alyssum need?+
Sweet Alyssum prefers full sun. Place it where it gets that light most of the day for best growth and flowering.
How often should I water Sweet Alyssum?+
Sweet Alyssum has moderate water needs. Keep soil consistently moist but not soggy. Shear back by half mid-summer when blooms slow — fresh growth and a new flush appears in 2 weeks. Honey-scented blossoms attract beneficial insects, making this a top companion in vegetable gardens.
How big does Sweet Alyssum get?+
Sweet Alyssum reaches a mature size of 3-6 in tall, 8-12 in wide. Growth rate is fast, so plan spacing accordingly when planting.
What plants grow well with Sweet Alyssum?+
Sweet Alyssum pairs well with Pansy, Petunia, Snapdragon, Geranium, Begonia. These companions share similar care requirements and don't compete aggressively for resources.
What pests affect Sweet Alyssum?+
Common Sweet Alyssum problems include essentially pest-free; attracts hoverflies (aphid predators). Catching early signs in routine inspection prevents most damage.
When does Sweet Alyssum bloom?+
Sweet Alyssum blooms in spring through first frost (rebloomer) in white, purple, pink, apricot. Deadheading spent flowers (where applicable) often encourages a longer bloom window.
Design a garden with sweet alyssum in minutes
Drag plants into a 3D space, walk through it, or upload a photo and let AI redesign it. Test spacing around its mature size before you plant.
More plants to design with
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