Grand Rapids Lettuce Seeds (Leaf Type) Heirloom Vegetable. The ruling Monarch of the leaf lettuce family since its introduction in the late 1800’s. Crispy, succulent, light green leaves are lightly crinkled and possess a fine delicate taste. This is an excellent variety for cut and grow again multiple harvests. You can also successfully grow a continuous supply of Grand Rapids outside the normal growing season by using a cold-frame, light garden or sunny window.