Aptly named, Mammoth sweet peas have extra-large flowers with lengthy stems—perfect for cutting! The subtle, sweet scent is delightful, too. Developed in the 1980s from Early Multiflora Gigantea, a Spencer-type sweet pea, this variety boasts drought and heat resistance, which results in a longer season of blooms. Attracts pollinators. Deer resistant. Caution: Most parts of this plant are toxic if ingested. 

Family: Fabaceae 

Type: Sweet Pea (Learn more) 

Native: Italy 

Hardiness: Frost-tolerant annual 

Exposure: Full Sun to Part Shade 

Bloom Period: Spring to Summer 

Plant Dimensions: 5'–6' 

Variety Info: 1''–2" flowers with moderate scent in shades of rose, blue, salmon, scarlet, white, lavender, and burgundy. 

Attributes: Attracts Pollinators, Drought Tolerant, Heat Tolerant, Frost Tolerant

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 bloom. Ideal soil temperature is 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"