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PlantSnap
Plant Care
Martha washington geranium
(Pelargonium domesticum)
Also Known As
Martha washington geranium, Regal geranium, House geranium
About This Plant
Pelargonium domesticum is a species of flowering plant in the family Geraniaceae, native to South Africa. It is a perennial shrub that grows up to 1.5 m (5 ft) tall and 1 m (3 ft) wide. The leaves are deeply lobed and dark green in color. The flowers are large and showy, ranging in color from white to pink to purple.
Plant Care Instructions
Outdoor Size Range
24-36 inches (60-90 cm)
Light Requirements
Regal Pelargoniums require bright light, but not direct sunlight. They can tolerate some shade but may not flower as well.
Humidity Needs
They prefer moderate to high humidity levels, around 50-60%. Placing a tray of water near the plant or misting the leaves can help increase humidity.
Fertilizing Schedule
Feed every 2-3 weeks during the growing season with a balanced fertilizer. Reduce feeding in the winter months.
Pruning Guidelines
Prune back after flowering to encourage bushier growth. Pinch back the tips of the stems to promote branching.
Common Pests and Diseases
Common pests include spider mites, whiteflies, and mealybugs. Diseases include Botrytis and Pythium.
Indoor Size Range
12-24 inches (30-60 cm)
Watering Schedule
Regal Pelargoniums prefer to be kept evenly moist but not waterlogged. Water when the top inch of soil feels dry to the touch.
Temperature Range
They prefer temperatures between 60-75°F (15-24°C). Avoid placing them in drafty areas or near heating/cooling vents.
Growing Season
Regal Pelargoniums bloom from late winter to early summer.
Growing Difficulty Level
Regal Pelargoniums are considered moderately difficult to grow. They require specific growing conditions and can be prone to pests and diseases.
USDA Hardiness Zones
They are hardy in USDA zones 10-11.
Did You Know?
Regal Pelargoniums are also known as Martha Washington Geraniums, named after the wife of George Washington who was a fan of the plant.
