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PlantSnap
Plant Care
Dog's mercury
(Mercurialis perennis)
Also Known As
Dog's mercury, Herb mercury
About This Plant
Mercurialis perennis is a species of flowering plant in the family Euphorbiaceae. It is also known as Dog's Mercury and Mercury's Herb. It is a perennial herb that grows up to 40 cm (16 inches) tall. The plant has greenish flowers that bloom from March to May.
Plant Care Instructions
Outdoor Size Range
Up to 40 cm (16 inches)
Light Requirements
Mercurialis perennis prefers partial to full shade, making it an ideal plant for woodland gardens.
Humidity Needs
It prefers average to high humidity levels.
Fertilizing Schedule
It does not require much fertilizer, but a light application of a balanced fertilizer in the spring can help promote growth.
Pruning Guidelines
It does not require pruning, but deadheading can help promote more blooms.
Common Pests and Diseases
Mercurialis perennis is generally pest-free, but can be susceptible to powdery mildew in humid conditions.
Indoor Size Range
N/A
Watering Schedule
It requires moderate watering, but the soil should not be waterlogged. Allow the soil to dry slightly between watering.
Temperature Range
It can tolerate a wide range of temperatures, but prefers cool to moderate temperatures.
Growing Season
Mercurialis perennis grows in the spring and summer months.
Growing Difficulty Level
Mercurialis perennis is an easy plant to grow, making it a great choice for beginner gardeners.
USDA Hardiness Zones
It is hardy in USDA zones 4-8.
Did You Know?
The name Mercurialis comes from the Roman god Mercury, who was the god of commerce, among other things. The plant was believed to have medicinal properties and was used to treat a variety of ailments, including skin diseases and eye infections.
