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PlantSnap
Plant Care
Petunia
(Petunia atkinsiana)
Also Known As
Petunia, Surfinias, Hanging petunias, Trailing petunias
About This Plant
Petunia atkinsiana is a species of flowering plant in the family Solanaceae, native to South America. It is an annual or short-lived perennial plant that grows up to 30 cm (12 inches) tall and 60 cm (24 inches) wide. The plant has trumpet-shaped flowers that bloom in a wide range of colors including white, pink, red, blue, and purple.
Plant Care Instructions
Outdoor Size Range
12-24 inches (30-60 cm)
Light Requirements
Petunias require full sun to grow and bloom. They need at least 6 hours of direct sunlight per day. If grown indoors, they should be placed near a south-facing window or under grow lights for at least 12-14 hours per day.
Humidity Needs
Petunias prefer moderate humidity levels of around 40-60%. They can tolerate drier air, but may require more frequent watering in low humidity conditions.
Fertilizing Schedule
Petunias benefit from regular fertilization with a balanced fertilizer every 2-3 weeks. Avoid using high-nitrogen fertilizers, as this can encourage leafy growth at the expense of flowers.
Pruning Guidelines
Petunias do not require heavy pruning, but deadheading spent flowers can encourage more blooms. Pinching back the tips of the stems can also promote bushier growth.
Common Pests and Diseases
Common pests that can affect petunias include aphids, spider mites, thrips, and whiteflies. Diseases such as powdery mildew and botrytis can also be a problem in humid conditions.
Indoor Size Range
6-12 inches (15-30 cm)
Watering Schedule
Petunias need regular watering to keep the soil moist but not waterlogged. They should be watered deeply once a week or more often in hot, dry weather. Avoid getting water on the leaves and flowers, as this can cause fungal diseases.
Temperature Range
Petunias are warm-weather plants and prefer temperatures between 65-80°F (18-27°C). They can tolerate cooler temperatures down to 50°F (10°C), but should be protected from frost.
Growing Season
Petunias are typically grown as annuals and can be planted in the spring after the danger of frost has passed. They will bloom throughout the summer and into the fall. In warmer climates, they may be grown as perennials.
Growing Difficulty Level
Petunias are relatively easy to grow, making them a popular choice for gardeners of all skill levels.
USDA Hardiness Zones
Petunias are hardy in USDA zones 10-11, but can be grown as annuals in cooler climates.
Did You Know?
Petunias were first discovered in Argentina in the 19th century and were originally white. It wasn't until breeders started experimenting with different colors that the petunia we know today was created.
