Petunia x hybrida  Tidal Wave varieties have a growth habit based on how closely the plants are spaced in the garden - the closer the spacing, the taller the plants. When spaced a minimum of 12 inches apart, plants form a dense, mounded hedge from 16 to 22 inches tall. When given given plenty of space, this petunia makes a floriferous groundcover, spreading 2 ½ to 4 feet per plant. Excellent Botrytis resistance and quick recovery from rain.