Home Garden Seeds Lettuce Green Wave (Approx 1100 Seeds) 3gmsGreen Wave lettuce is a variety of leaf lettuce known for its frilly, curly leaves and vibrant green color. The leaves are deeply lobed and have a ruffled, wavy texture, which gives them an attractive, ornamental look. They are typically bright green and can have a slightly glossy finish. Seed Sowing: 1. Fill the seedling tray with good quality media and sprinkle with water. 2. Lightly press the media in each plug of the seedling tray to make a hole.