Leaf stalks (the only edible part of the plant) are used in pies. Often mixed with Strawberry or Apple. Grows 2-3 feet its first season, maturing in season 2 at up to 5 ft in good soil. 
 
Available in 4 inch single plant cups, flats of 18 plants, and 1 gallon pots for ($6), or Plant a Patch - 5 pots for $25.