How to Grow Sweet Alyssum 'Carpet of Snow'
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Sweet Alyssum 'Carpet of Snow'
Lobularia maritima 'Carpet of Snow'
flowerSweet Alyssum 'Carpet of Snow' is a low-growing, spreading annual flower known for its dense carpet of tiny, fragrant white blooms that cover the plant throughout the growing season. This variety is particularly valued for its compact habit, reaching only 4-6 inches tall, and its ability to self-seed readily. The intense honey-like fragrance and prolific flowering make it an excellent choice for edging, containers, and ground cover plantings.
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Example Sweet Alyssum 'Carpet of Snow' timeline · Pittsburgh, PA (Zone 6b)
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Plant Sweet Alyssum 'Carpet of Snow'
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Sweet Alyssum 'Carpet of Snow' blooms
Around May 22≈ 35 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Best in zones 2-9; tolerates heat and cold well, though prefers cool to moderate climates
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Germination & Seedling
10-14 daysTiny seeds sprout within 5-10 days under proper conditions; seedlings develop cotyledons and first true leaves
Keep soil moist but not soggy; provide bright light and adequate air circulation to prevent damping off; maintain 65-75°F soil temperature
Vegetative Growth
14-21 daysPlant develops bushy, branching foliage; leaves are small, narrow, and lance-shaped; no flowers yet
Thin seedlings to proper spacing; pinch growing tips if leggy to promote bushier growth; fertilize monthly with balanced fertilizer
Early Flowering
10-14 daysFirst tiny clusters of white flowers appear at branch tips; plant begins to spread and fill out
Begin deadheading spent flower clusters to encourage continuous blooming; reduce nitrogen fertilizer to prevent excessive leaf growth
Peak Bloom & Maintenance
8-12 weeks or until frostDense carpet of fragrant white flowers covers entire plant; blooms continuously throughout season in cool weather
Continue deadheading or shear plant lightly every 3-4 weeks to refresh blooms; water during hot spells; watch for powdery mildew in humid conditions
Decline & Seed Set
Varies by climate; 2-8 weeks before frost or heat stressFlowering slows in extreme heat or as temperatures cool toward frost; plant produces small seed pods if allowed
Allow some flowers to set seed for self-sowing next year; remove plant after hard frost or replant annually in cool climates
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use insecticidal soap or neem oil if infestation is severe; introduce beneficial insects like ladybugs
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Improve air circulation; avoid overhead watering; apply sulfur or potassium bicarbonate fungicides; remove heavily infected leaves
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and
Remove by hand in early morning; create barriers with copper tape or diatomaceous earth; use beer traps or slug bait
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Use yellow sticky traps; spray with neem oil or insecticidal soap; encourage natural predators
Uses
Fragrant Cut Flowers & Arrangements
HouseholdSweet Alyssum produces delicate sprays of tiny fragrant flowers ideal for small bouquets, wedding arrangements, and corsages. The intense honey-like scent fills a room and pairs beautifully with larger focal flowers. [source]
Edible Flowers
CulinarySweet Alyssum flowers are edible with a mild, sweet honey-like flavor. Use them as delicate garnishes for cakes, salads, and desserts for visual appeal and subtle sweetness. [source]
Pollinator Magnet
WildlifeThe abundant small flowers attract bees, butterflies, and other pollinators throughout the season. This makes it an excellent choice for supporting pollinator populations in gardens. [source]
Ground Cover & Border Plant
HouseholdThe dense, spreading habit of 'Carpet of Snow' makes it ideal for edging garden beds, pathways, and containers, creating a living carpet of fragrant white blooms. [source]
Dried Flowers for Crafts
CraftSweet Alyssum flowers dry well and can be pressed or dried for use in crafts, floral arrangements, and scrapbooking projects. They retain their delicate form and fragrance when properly dried. [source]
Harvest Tips
Sweet Alyssum is grown for ornamental flowers, not harvest. Cut fresh flowers for indoor arrangements by snipping stems in early morning when dew is still present. Deadhead spent flower clusters regularly to encourage continuous blooming throughout the season. To collect seeds for next year, allow some flowers to dry on the plant, then gather seed pods when they turn brown and papery.
Fun Facts
- 🌱 Sweet Alyssum was named 'Alyssum' from the Greek 'a' (not) and 'lyssa' (madness), as it was once believed to cure rabies and calm anger, though this is purely folkloric.
- 🌱 'Carpet of Snow' is one of the most compact and floriferous varieties available, capable of producing hundreds of tiny flowers per plant and self-seeding prolifically for years in the same location.
- 🌱 The intense fragrance is strongest in cool weather and early mornings, which is why the plant is traditionally included in English cottage gardens and Victorian gardens where scent was paramount.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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