2nd Year Maturity. Powderpuffs Double Mix hollyhock seeds are an ideal grow to rejuvenate any tired garden into a stunning and vibrant winner. Powderpuffs Double Mix seeds grow tolerant 48-72 inch tall hollyhocks bursting with classic 3-4 inch heads in shades of yellow, fuchsia, red, pink, rose, and magenta. Powderpuffs Double Mix hollyhock seeds are an essential eye-catching addition to show off in the back of the garden, a fence, or any wide open spaces. Powderpuffs Double Mix hollyhock is a hardy perennial that will vigorously reseed itself for even more spectacular color the following season.