Hollyhock 'Blacknight' is a single black flower that can grow 5-6' tall. This series is considered perennial and we have had very good luck with them returning each year. Well drained soils is a must and full to part sun ideal.
Hollyhock ''Fiesta Time' is a shorter variety, 3' which makes this a perfect addition to smaller gardens. Double pink cerise bloom in midsummer, treat this one as a biannual or short lived perennial.
Hollyhock 'Halo Cerise' Large single cerise pink with dark purple halo. 5-6' tall
Hollyhock 'Halo Lavender' single lavender flowers with pink halo.
Hollyhock 'Las Vegas' Fig leaf Hollyhock with mixed single blooms in red, copper, chestnut brown, yellow, pink, or white. Shorter species to 5'.
Hollyhock 'Radiant Rose' is single rose pink flowers in midsummer. Growing 5-6', considered a true perennial.
Photo courtesy of Walters Gardens, Inc