Each wildflower mixture we carry has a recommended minimum and maximum planting rate. The planting rates for some mixtures are adjusted higher due to the presence of small-seeded, nonaggressive species. In general however, the minimum planting rates are based on 60-70 seeds per square foot (4 to 12 pounds per acre), which is usually sufficient to establish a good stand of wildflowers on prepared soil when adequate weed control can be maintained. Maximum planting rates are based on 120-140 seeds per square foot (8 to 24 pounds per acre), and are recommended when adequate soil preparation and weed control are not possible, or when maximum color is required. Avoid using more than the recommended rates since poor perennial establishment may result.