Hosta 'Sum and Substance'-Perhaps the largest and most popular of the hostas, this robust award winner has immense leathery leaves of chartreuse that become gold as summer approaches. A bold landscape feature when accentuated by smaller bright-colored hostas and other perennials. Thick foliage resists slug damage. Hosta of the Year, 2004. Fast growing; forms foliage clump 2 to 3 ft. tall, 5 to 6 ft. wide.