Sweet peas are fragrant climbing annuals that make a lovely addition to cut flower arrangements, wildflower meadows, and cottage gardens. They grow quickly and are available in a wide range of colours. Graceful sweet pea vines thrive in many garden conditions and offer a constant supply of gorgeous, fragrant blossoms all summer long. Soak seed overnight before planting. Direct sow in amended soil in spring. Sweet peas require full sun, rich and well-draining soil, and support from a trellis or netting. As they prefer alkaline soil, add some lime to your planting location if your soil is acidic. They are heavy feeders and will appreciate a healthy application of compost to their bed before planting.