Petunia hybrida 'Lavender Sky' purple-whiteA sea of purple and white flowers. The surfinia 'Lavender Sky' has vines that can become as long as 60 cm. For a starry sky of large flowered petunias. Now just find a nice spot to hang the hanging plant. Plant the petunia from March to June. The flowers bloom from April to October. The petunia is happiest in full sun. Don't water it until the potting soil feels dry to the touch. Give it extra water during dry periods.