Petunia Seeds - Double Madness Series (pelleted)98 105 days. Double Madness Series seeds grow a hardy and spectacular alternative to the internationally famous single blooming petunia. Double Madness petunias promise feathery and double blooming 3 wide papier mch heads in a signature choice of Burgundy, Lavender, Salmon, Pink Satin, Red and White, Rose and White, or Mix. Double Madness Series petunias mature into neat 10 15 tall mounded uprights perfect as a tidy grow in beds, borders, edging, or