Outsidepride Penstemon Rocky Mountain Seed - 1/4 LB Outsidepride is a U.S. Company. No other company on this listing is selling Outsidepride seed. USDA Zones: 3 - 6 Height: 24 - 36 inch perennial Bloom Color: Purple-blue Sowing Rate: 2 ounces per 1,000 square feet or 5 pounds per acre