Knee-hi Blend Sweet Pea is a compact cultivar of Lathyrus odoratus that brings the fragrant charm of classic sweet peas to smaller gardens and containers. Unlike tall varieties that demand extensive trellising, this knee-high blend offers a manageable stature while delivering the same intoxicating fragrance and delicate flowers that have made sweet peas beloved for centuries. Sow seeds in cool weather, ideally 4 to 6 weeks before your last frost date, and watch them flourish in full sun to partial shade with moderate water and well-draining soil kept between pH 6.5 and 7.5.
Partial Sun
Moderate
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This dwarf blend thrives in the cool season window that most gardeners overlook, germinating best between 55°F and 65°F when many spring flowers are just breaking dormancy. The compact stature eliminates the fussy staking and tying that taller sweet peas require, making it accessible to gardeners who love the fragrance but lack the space or patience for elaborate supports. Cold-tolerant from the seedling stage, it can be direct sown outside weeks before your average last frost date, rewarding early spring planting with reliable, abundant blooms.
Sweet peas are grown primarily for their intensely fragrant flowers, which make exceptional cut flowers for arrangements and bouquets. The blooms are edible and occasionally used as garnishes in upscale culinary presentations, though they are valued far more for their ornamental and olfactory qualities than for any culinary purpose.
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Start seeds indoors 4 to 6 weeks before your average last frost date. Sow seeds 1 inch deep in seed-starting mix and maintain temperatures between 55°F and 65°F for optimal germination. Transplant seedlings outdoors 4 to 6 weeks before your last frost date.
Transplant seedlings outdoors 4 to 6 weeks before your average last frost date when they are established and the soil is workable. Space plants 6 inches apart. The frost-tolerant nature of this variety means early transplanting carries minimal risk.
Direct sow seeds outside 4 to 6 weeks before your average last frost date in cool climates. In mild climates, sow from late fall through early winter for winter bloom. Push seeds 1 inch into the soil.
Harvest sweet pea flowers in early morning after dew has dried but before the day heats up, which preserves their fragrance and extends vase life. Cut stems with multiple open blooms and buds at various stages; buds will continue opening in the arrangement. Harvest frequently to encourage the plant to produce more flowers throughout the season.
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