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 annual flower that creates a dense, spreading carpet of tiny white blooms. It's beloved for its delicate fragrance, prolific flowering, and ability to soften garden edges and fill container spaces. This cultivar is particularly valued for its pure white flowers and compact, mounding habit.
When should you plant Sweet Alyssum 'Carpet of Snow' in your zone?
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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 →Hardy annual thriving in zones 2-11; best as a cool-season flower in zones 9-11
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Seedling
7-10 daysTiny seedlings with first true leaves appearing; very delicate and small.
Keep soil moist but not soggy; provide good air circulation to prevent damping off. Thin seedlings to proper spacing once they have true leaves.
Vegetative Growth
2-4 weeksPlant develops low, spreading mound with narrow green leaves; no flowers yet.
Water regularly and ensure adequate sunlight. Pinching back growing tips encourages bushier growth and fuller coverage.
Flowering
6-12 weeks or until frostDense clusters of tiny, fragrant white flowers cover the plant; blooms are prolific and continuous.
Deadhead spent flowers to encourage more blooms. Fertilize every 2-3 weeks with balanced or slightly higher phosphorus fertilizer. Water consistently.
Peak Bloom & Maintenance
Ongoing until frost or extreme heatPlant is fully covered in white flowers, creating a seamless carpet effect; flowers remain abundant with proper care.
Continue deadheading and fertilizing. In hot climates, provide afternoon shade. May slow or stop blooming in peak heat; it revives in cooler weather.
Decline & End of Season
Until first hard frostAs temperatures drop significantly or frost approaches, flowering slows and plant begins to deteriorate.
Can be pulled up once hard frost arrives. In mild climates (zones 9-11), may self-seed for next season if allowed to set seed.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use row covers on young plants; spray neem oil or insecticidal soap if damage appears; encourage predatory insects.
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Spray with water to dislodge; use insecticidal soap or neem oil; introduce ladybugs or lacewings.
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Use yellow sticky traps; spray with neem oil or insecticidal soap; ensure good air circulation.
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Ensure well-draining soil; avoid overwatering; remove affected plants; improve air circulation.
Uses
Edible Flowers
CulinarySweet Alyssum flowers are edible with a slightly sweet, peppery flavor and can garnish salads, desserts, and dishes. They add delicate visual appeal to culinary presentations. [source]
Cut Flowers & Fragrance
HouseholdThe fragrant white flowers are excellent for small bouquets, corsages, and floral arrangements. Their sweet honey-like scent perfumes gardens and indoor displays. [source]
Pollinator Support
WildlifeSweet Alyssum attracts bees, butterflies, and other beneficial insects throughout the growing season, making it valuable for supporting pollinator populations. [source]
Dried Flowers
CraftFlowers can be dried and used in dried arrangements, wreaths, and pressed flower crafts. They retain their delicate appearance and subtle fragrance when properly dried. [source]
Ground Cover & Edging
HouseholdPerfect for edging beds, softening container rims, hanging baskets, and creating living mulch in garden borders. Creates a continuous carpet of color from spring to frost. [source]
Harvest Tips
Sweet Alyssum is grown for ornamental flowers rather than harvest. Deadhead spent flower clusters regularly by pinching them off to encourage continuous blooming throughout the season. You can also cut small sprigs of flowers for fresh arrangements and their delicate fragrance.
Fun Facts
- 🌱 'Carpet of Snow' is named for its ability to create a dense, continuous blanket of white flowers just 4-6 inches tall, making it ideal for rock gardens and tight spaces.
- 🌱 Sweet Alyssum self-seeds readily; seeds that fall in fall often germinate in spring, providing volunteer plants year after year in many climates.
- 🌱 The plant is highly fragrant, especially in cool morning hours and evenings, releasing a sweet honey-like scent that intensifies during mild weather.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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