The colourful trumpet shaped blooms are cheerful reminders that summer has arrived. Perfect for containers and hanging baskets, petunias are a long standing favourite for patio or balcony gardens.
Petunias are available in dozens of brilliant colours and can be solid, striped or picotee. They come in several sizes as well, ranging from the smallest, Millifloras, which are 1 inch across to the largest, Grandifloras, which are 5 inches across. Although technically perennial, most petunias are grown as half hardy annuals.
Sowing petunias from seed should happen from January through March, but only in warmer climates, above 21 degrees Celsius. Place in pots of compost, on the surface, do not cover. Seedlings should sprout within two weeks time. Separate strong seedlings into individual pots after a few weeks and plant outside in June.
Flowers bloom from June through September. Deadheading is recommended.
Petunias are easily damaged by strong winds and heavy rains. Keep in full sunlight, preferably south-facing and sheltered from wind. Plant in well-drained soil mixed with compost and/or manure.
Remove plants after they stop flowering (usually around first frost).
Zone 7, frost hardy to zone 5.