Petunia is a genus of 20–25 species of flowering plants in the family Solanaceae, native to South America. They are herbaceous plants, grown as annuals, and are generally treated as half-hardy annuals in temperate climates. Plant are generally insect pollinated, with the exception of P. exserta, which isa hummingbird pollinated species.
The flowers of the genus are diurnal, with most opening in the morning and closing in the evening, though some varieties remain open at night.
Soil:
Plant prefers full sun and well-drained soil.
Water:
Plant should be watered regularly, especially during dry spells.
Fertilizer:
A general-purpose fertilizer can be applied to the petunia throughout the growing season.
Pests and Diseases:
Plant is susceptible to aphids, thrips, and whiteflies. The plant is also susceptible to several diseases, including Alternaria leaf spot, Anthracnose, and Powdery mildew.
Season:
Plant blooms from spring to fall.
Light:
Plant prefers full sun.
Height:
The petunia ranges in height from 6 inches to 3 feet.