has a staggering 21,000 varieties, including 'Gentle Giant,' with ruffled, twisted deep-blue-green leaves that reach 12 inches across. Grows to 42 inches high and 65 inches wide.
features nearly 900 varieties, including 'Bam Bam Blue,' which has a deep blue color and puckered leaves that reach 91⁄2 inches across. Grows to 30 inches high and 48 inches wide.
offers some 300 varieties, including 'Radiant Star,' a smaller hosta that has heart-shaped dark green leaves, with chartreuse margins, that turn yellow. Grows to 7 inches high and 12 inches wide.
has about 125 varieties, including 'Pharaoh's Fawcett,' with puffy, rounded blue leaves and green margins. Grows to 18 inches high and 36 inches wide.