2nd Year Maturity. Chater's Double Mixture hollyhock seeds promise to turn any stale bedding into a sensational and eye-catching garden this season. Chater's Double Mixture seeds promise hardy 72-96 inch tall hollyhocks bursting with huge 5 inch blooms in shades of pink, red, rose, yellow, copper, scarlet, white, purple, and maroon. Chater's Double Mixture hollyhock seeds are a spectacular grow in the back of the garden, along a fence, or lining the house. Chater's Double Mixture hollyhock is a hardy annual that thrives as a perennial in optimal gardens, but will easily reseed itself each season for as long as you'll have it around.