Bedding petunias should be planted at the same level as in their plug or nursery pot with plenty of space for the spreading varieties. Plants in containers are usually planted closer together, so that the pots overflow with colour. Those described as millifloras will be two or three inches smaller. Petunias are becoming more and more popular for hanging baskets primarily because of their enormous staying power, producing flowers or attractive foliage which will last throughout the summer and early autumn. The current fashion for hanging baskets seems to be for a single subject, as in the petunia basket with four or five plants of the same variety.
Mixed plants following a colour theme is also in vogue.
Last year I was impressed by a local pub's red, white, and blue display.