~ Shock Wave Deep Purple * Trailing Petunia * 20 Pelleted Seeds This is for 20 "Pelleted SEEDS" for the 2015 season, instructions included. " Shock Wave Deep Purple " The "Shock Wave" Petunia's are a Small flowered petunia that literally spreads to a canopy of color. They are similar to the Regular Wave, with a tighter mound that just blankets these plants with flowers. Earliest spreading petunia available. Color: Deep Purple Plant Habit: Mounding & Spreading Uses: Hanging baskets, ground covers, large containers, anywhere for them to drape over