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PlantSnap
Plant Care
Annual mercury
(Mercurialis annua)
Also Known As
Annual mercury, Mercury herb, Herb mercury, Dog's tongue
About This Plant
Mercurialis annua is an annual plant that grows up to 40 cm tall. It has green leaves that are simple, alternate, and toothed. The flowers are small, green, and not very showy. The plant produces small, round, black seeds.
Plant Care Instructions
Outdoor Size Range
Height: 10-40 inches (25-100 cm), Spread: 10-20 inches (25-50 cm)
Light Requirements
Mercurialis annua prefers partial shade to full sun. It can tolerate shade but will flower less in low light conditions.
Humidity Needs
Mercurialis annua does not have specific humidity requirements and can grow in a wide range of humidity levels.
Fertilizing Schedule
Mercurialis annua does not require heavy fertilization. A balanced fertilizer applied once a month during the growing season will suffice.
Pruning Guidelines
Mercurialis annua does not require pruning for its shape. However, pruning can be done to control its size and promote bushier growth.
Common Pests and Diseases
Mercurialis annua is relatively pest-free but can be susceptible to aphids and spider mites.
Indoor Size Range
Not suitable for indoor cultivation
Watering Schedule
Water Mercurialis annua regularly, keeping the soil moist but not waterlogged. It can tolerate short periods of drought but will not thrive in dry conditions.
Temperature Range
Mercurialis annua prefers moderate temperatures between 60-75°F (15-24°C). It can tolerate higher temperatures but may require more frequent watering.
Growing Season
Mercurialis annua can be grown year-round in mild climates. In colder climates, it is best to sow seeds in the spring or early summer.
Growing Difficulty Level
Mercurialis annua is easy to grow and maintain, making it a great choice for beginner gardeners.
USDA Hardiness Zones
Mercurialis annua is not a hardy plant and can only be grown in USDA zones 9-11.
Did You Know?
The name 'Mercurialis' comes from the Roman god Mercury, who was believed to have healing powers. The plant was used in traditional medicine to treat a variety of ailments, including skin conditions and digestive problems.
