2nd-year maturity. Alcea rosea. Hollyhock Powderpuffs Double Mix Seeds. Non-GMO, Perennial/Biennial. Powderpuffs Double Mix hollyhock seeds are an ideal plant to rejuvenate a 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 biennial that will vigorously reseed itself for an even more spectacular color the following season. Approx 3000 seeds per ounce.