Growing Petunias and Pansies in Tasmania, Australia. There are many different colours of petunias to choose from. Plant seedings in bed of one colour or many colours together. Plant 20 to 25cm apart, water in well.
Petunias are an annual.
I recommend planting seedlings which can be purchased at your local nursery. Plant in spring when all the hard frosts are gone and petunias will reward you with long lasting colour throughout the spring, summer and autumn. To encourage the plant to spread pinch back, as they grow and begin to flower dead heading is recommended. Prepare the ground with compost that is aged and use snail bait or a saucer of beer to help keep the snails at bay. What another delightful flower.