Knee sweet pea flower seeds grow into climbing, vining plants with a delicate growth habit suited to cool and mild growing conditions. This sweet pea type is commonly grown as an annual flowering vine and performs best in gardens with moderate temperatures. Plants require support such as trellises, fences, or netting and adapt well to garden beds, borders, and large containers when planted in well drained soil. Seeds are typically direct sown in early spring or fall, depending on climate.
Features
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Climbing, vining flower growth habit
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Well suited to cool and mild climates
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Requires support such as trellis or netting
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Suitable for garden beds, borders, and containers
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Seasonal flowering vine for ornamental planting
Specifications
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Scientific name: Lathyrus odoratus
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Common name (US): Sweet Pea
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Seed type / variety: Knee
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Growth habit: Climbing, vining annual
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USDA hardiness zones: 2 to 9
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Planting season: Early spring or fall
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Sowing season:
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Zones 2 to 5: April to May
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Zones 6 to 7: March to April or October
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Zones 8 to 9: February to March or November
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Germination time and conditions: 10 to 21 days; cool soil temperatures between 55 and 65 degrees Fahrenheit
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Sunlight requirements: Full sun to partial sun
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Soil requirements: Well drained soil with moderate organic matter
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Watering needs: Regular watering; soil kept evenly moist
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Mature plant size: Vines reach 5 to 7 feet with support
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Plant spacing: 4 to 6 inches between plants