Mammoth Navy Blue sweet peas live up to their name with striking, extra-large blooms in deep, velvety purple-blue hues atop lengthy stems—ideal for cutting gardens and floral arrangements. Developed from Early Multiflora Gigantea, this Spencer-type variety offers not only beauty but impressive heat and drought resistance, ensuring a longer season of fragrant blossoms. Perfect for trellises, fences, and garden beds, these sweet peas attract pollinators while bringing vibrant color and a delightful scent to your outdoor spaces.
Family: Fabaceae
Native: Italy
Hardiness: Frost-tolerant annual
Exposure: Full Sun to Part Shade
Bloom Period: Spring to Summer
Plant Dimensions: 5’–6' vines
Variety Info: 1"–2" dark purple-blue flowers
When to Sow Outside: RECOMMENDED. Cold Climates: 4 to 6 weeks before your average last frost date. Mild Climates: Late fall to early winter for spring blooms. Ideal soil temperature of 55°-65°F.
When to Start Inside: 4 to 6 weeks before your average last frost date.
Days to Emerge: 10 – 21 Days
Seed Depth: 1"
Seed Spacing: A group of 3 seeds every 6"
Thinning: When 3" tall, thin to 1 every 6"
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