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Plant Care

Mexican petunia

(Ruellia simplex)

Mexican petunia (Ruellia simplex) - Image 1 of 10
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Also Known As

Mexican petunia, Persian violet, River petunia

About This Plant

Ruellia simplex is a herbaceous perennial plant that grows up to 2 feet (60 cm) tall and 3 feet (91 cm) wide. It has lance-shaped leaves and produces funnel-shaped blue or purple flowers that bloom from summer to fall.

Plant Care Instructions

Outdoor Size Range

18-36 inches (45-91 cm)

Light Requirements

Mexican petunias prefer full sun to partial shade.

Humidity Needs

Mexican petunias prefer moderate humidity levels.

Fertilizing Schedule

Fertilize every 4-6 weeks during the growing season with a balanced fertilizer.

Pruning Guidelines

Prune in early spring to remove any dead or damaged growth and to promote bushier growth.

Common Pests and Diseases

Mexican petunias are generally pest-free, but can occasionally be affected by spider mites or whiteflies.

Indoor Size Range

12-24 inches (30-60 cm)

Watering Schedule

Water regularly, making sure the soil is moist but not waterlogged.

Temperature Range

Mexican petunias are hardy in USDA zones 8-11 and prefer warm temperatures.

Growing Season

Mexican petunias grow best in the spring and summer.

Growing Difficulty Level

Mexican petunias are easy to grow and require minimal maintenance.

USDA Hardiness Zones

USDA hardiness zones 8-11

Did You Know?

Mexican petunias are considered invasive in some areas, including Florida, where they have been known to spread rapidly and crowd out native plants.

Community Photos and Experiences

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