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Sweet Alyssum

Sweet Alyssum

Lobularia maritima

flower

Sweet alyssum is a delicate, low-growing annual flower that produces dense clusters of tiny, fragrant blooms in white, pink, purple, or lavender. It's a popular edging and ground cover plant that blooms prolifically from spring through fall. Known for its sweet honey-like fragrance, it attracts pollinators and adds charm to gardens, borders, and containers.

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Growing Conditions

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Sun: Full sun, 6+ hours daily; tolerates light shade in hot climates
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Water: Moderate water needs; water when top inch of soil is dry. Avoid overwatering as it prefers slightly dry conditions. In containers, water more frequently.
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Spacing: 4-6 inches
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Days to maturity: 50-60 days from seed to flowering
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Planting depth: Surface sow or barely cover seeds; needs light to germinate

Soil

Type: Well-draining loamy to sandy soil
pH: 6.0-7.5
Amendments:
Compost Perlite for drainage Aged manure

Growing Zones

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Thrives in zones 2-11; annual in colder zones, perennial in warmer zones

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b

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Growth Stages

1

Seedling

2-3 weeks

Tiny seedlings with first true leaves emerging; plants are delicate and small.

Keep soil consistently moist but not waterlogged. Provide bright light. Thin seedlings to proper spacing once they have 2-3 true leaves.

2

Vegetative Growth

3-4 weeks

Plants develop bushy, mounding form with increasing foliage; rapid leaf and stem development.

Pinch back growing tips to encourage bushier growth. Maintain moderate watering. Gradually reduce fertilizer if overly vegetative at expense of flowers.

3

Flowering

6-12 weeks (extends into fall with deadheading)

Dense clusters of tiny, four-petaled flowers appear; constant blooming throughout season.

Deadhead spent flowers regularly to encourage continuous blooming. Water moderately and avoid wetting flowers. Feed every 2-3 weeks with balanced or bloom-boosting fertilizer.

4

Peak Bloom

4-8 weeks

Plant is covered in fragrant flowers; full mounding form with minimal visible foliage.

Continue deadheading. Cut back by one-third if plant becomes leggy. Ensure consistent watering during hot spells. Monitor for pests.

5

Late Season

Until first frost (or year-round in zones 9-11)

Flowering may slow in hot summers; regrows and rebounds in cooler fall weather.

If summer bloom slows in very hot climates, prune plants back and increase watering to promote fall reflowering. In warm zones, may reseed for next season.

Companion Planting

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Plant with:

Lobelia Petunia Marigold Dusty Miller Snapdragon Pansies Ornamental kale Zinnias Lavender

Avoid planting near:

Tall aggressive plants that shade it heavily Plants requiring consistent high moisture

Common Pests

  • Spray with water to dislodge; use insecticidal soap or neem oil if severe.

  • Hand-pick caterpillars; use Bacillus thuringiensis (Bt) for heavy infestations.

  • Increase humidity; spray with water; use miticide or neem oil if needed.

  • Yellow sticky traps; spray with insecticidal soap or neem oil.

Uses

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Edible garnish

Culinary

Sweet alyssum flowers are edible and commonly used as delicate garnish for cakes, salads, and desserts. The mild, honey-sweet flavor adds visual appeal and subtle sweetness. [source]

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Cut arrangements and crafts

Craft

Delicate sprigs are perfect for small bouquets, wedding arrangements, and floral crafts. The flowers dry well and retain their fragrance. [source]

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Pollinator attraction

Wildlife

Sweet alyssum's abundant tiny flowers are excellent nectar sources for bees, butterflies, and other pollinators. It blooms for months, providing reliable food sources. [source]

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Garden fragrance

Household

The distinctive sweet honey-like fragrance fills gardens, particularly in evening and early morning. Often planted near seating areas to enjoy the scent. [source]

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Traditional herbal use

Medicinal

Historically used in traditional medicine for minor skin irritations and as a gentle antiseptic, though modern scientific evidence is limited. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Sweet alyssum is grown for ornamental flowers and fragrance rather than harvest. Deadhead spent flower clusters regularly to promote continuous blooming. Cut sprigs with flowers for small fresh arrangements or to enjoy fragrance indoors. Allow some flowers to set seed if you want self-seeding for next season.

Fun Facts

  • 🌱 Sweet alyssum's scientific name 'maritima' refers to its coastal origins in the Mediterranean, where it naturally grows on rocky shores and cliffs.
  • 🌱 A single mature plant can produce hundreds of flowers over a season, and each flower can set seed if allowed to develop, leading to prolific self-seeding.
  • 🌱 The fragrance intensifies in evening hours and on cooler days, making it especially aromatic in spring and fall rather than during hot summer afternoons.

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