Annual mercury (Mercurialis annua)
Care, watering, light and tips for Annual mercury on Floravia.
Quick facts
- Family: Euphorbiaceae
- Difficulty: Easy to care for
- Watering: every 10 days
- Light: Full sun
- Temperature: 10–38 °C
- Toxicity: Toxic to pets
About Annual mercury
Mercurialis annua, also known as annual mercury, is a small annual herbaceous plant belonging to the Euphorbiaceae family, commonly found as a weed. It features branched stems, bright green oval leaves, and tiny, inconspicuous flowers. Its unassuming appearance makes it more suitable for botanical studies or weed management in gardens rather than as an ornamental plant.
Native range
Temperate regions of Europe, North Africa, and Western Asia.
Care tips
As a weed, Mercurialis annua is highly adaptable. It prefers full sun to partial shade and well-drained soils, but can thrive in a wide range of conditions. Watering should be moderate, as it is drought-tolerant once established. A common mistake is underestimating its prolific spreading ability, so it's crucial to remove it before it sets seed to prevent infestations.
How to save a dying Annual mercury
- Warning signs
- Yellowish or reddish, wilted and soft leaves; weak and drooping stems.
- First aid
- Carefully remove the plant from the soil, check roots for rot. Cut off damaged parts.
- What kills it
- Excessive moisture and lack of light. It's a ruderal plant, doesn't tolerate waterlogging.
- Can it be saved?
- Yes, if you act quickly and there's no extensive root damage. Transplant to a dry, sunny spot.