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Pink petunias.jpg
Petunia x atkinsiana flower
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Solanales
Family: Solanaceae
Genus: Petunia

Petunia is a genus of plants. All of them bear flowers. They are in the Nightshade family, and are related to tobacco. Many people grow them in the garden. Petunias are usually used as annual plants, because they die when the weather becomes cold. They grow best when they are planted in the sun.