Red And Yellow Petunia Flowers. Bicolor Bed. Solanaceae, Petunioideae. Stock Photo

Mix of red and yellow Petunia flowers. Petunia is a genus in the family Solanaceae, subfamily Petunioideae.Petunias are generally insect pollinated. The tubular flowers are favoured by some Lepidoptera species, including the Hummingbird hawk moth.Petunias can tolerate relatively harsh conditions and hot climates, but not frost. They need at least five hours of sunlight every day and flourish in moist soil and conditions of low atmospheric humidity. They are best grown from seed. Watering once a week should be sufficient in most regions. Hanging baskets and other containers need more frequent watering. Maximum growth occurs in late spring. Applying fertilizer monthly or weekly, depending on the variety, will help the plant grow quickly.The Maya and Inca believed that the scent of petunias had the power to ward off underworld monsters and spirits. Their flower-buds were bunched together for magical drinks.