Lettuce Leaf basil seeds produce very large, bright, puckered green leaves with a glorious aroma. Provide high soil fertility and a light, well-dug soil to get the largest leaves.Tear the big leaves into salad mixes or use whole leaves to wrap savory morsels like brochettes or salad rolls. Lettuce Leaf Basil is a sweet basil, with milder flavour than the Genovese types. It’s perfect for the home gardener, but it also makes an eye catching and unique bundle for the market table.