Alyssum ‘Rosie O’Day’ (Lobularia maritima) is a charming annual plant known for its sweet fragrance and profusion of rose-pink flowers. It’s a popular choice for borders, rock gardens, and containers, adding a delightful pop of color and attracting pollinators like bees and butterflies.
Plant Characteristics:
Height: Approximately 4–6 inches (10–15 cm)
Spread: 6–12 inches (15–30 cm)
Bloom Period: Spring through fall
Light Requirement: Full sun to partial shade
Soil: Prefers well-drained soil; tolerates poor soil conditions
Water Needs: Average; exhibits drought tolerance once established
Hardiness Zones: Annual; suitable for USDA zones 3–10
Planting Instructions:
When to Sow Outside: 1 to 2 weeks before the average last frost date, when soil temperatures are between 60°–85°F (15°–29°C). In milder climates, fall sowing is recommended for winter blooms.
When to Start Inside: 4 to 6 weeks before the average last frost date.
Seed Depth: Press seeds into the soil surface; do not cover, as they require light for germination.
Days to Emerge: 5–15 days
Seed Spacing: Scatter a pinch of 20–30 seeds every 6 inches (15 cm)
Thinning: Not necessary
Care Tips:
Maintenance: Deadheading spent flowers can encourage continuous blooming.
Pests/Diseases: Generally pest-free; deer and rabbit resistant.
Companion Planting: Pairs well with pansies and other early-blooming annuals.
‘Rosie O’Day’ Alyssum is celebrated for its versatility and ease of growth, making it an excellent choice for gardeners seeking low-maintenance, fragrant blooms throughout the growing season.
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