- You Will Get 25 Seeds Of Pelleted Petunia Shock Wave Deep Purple Trailing Flower Seeds. - Sunlight: Partial Shade, Full Sun. - Watering: Light. - This petunia is a mounding and trailing kind it gets about 10" tall and it trails to about 3 feet. - This petunia it flowers sooner than any other spreading petunia. - This petunia is great in hanging baskets mix a couple different colors together and you will have a nice mix of flowers that will bloom all summer long.