Mercurialis annua, commonly known as Annual Mercury, is a fast-growing herb with a branched stem, producing small greenish flowers and capsules. It is often found in disturbed soils.
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Sunlight
Prefers full sun to partial shade.
Watering
Keep soil consistently moist but not waterlogged.
Soil
Prefers well-drained, fertile soil. Tolerates a wide range of soil types, including poor or disturbed soils.
Temperature
Grows best in moderate temperatures.
Habitat
Outdoor
Fertilizer
Light feeding is sufficient.
Prefers full sun to partial shade.
Tolerates a range of light conditions.
Keep soil consistently moist but not waterlogged.
Water regularly, especially during dry spells.
Prefers well-drained, fertile soil. Tolerates a wide range of soil types, including poor or disturbed soils.
Grows best in moderate temperatures.
Ideal range is 15-25 °C.
Outdoor
Light feeding is sufficient.
Use a balanced fertilizer in spring if soil is poor.
Plant Type
Herb
Plant Category
Foliage
Plant Place Type
Ground
Plant Environment
Outdoor
Lifespan
Annuals
Plant Height
0.2-0.6 m
Spread
0.1-0.3 m
Growth Rate
Fast
Dormancy
None (annual)
Leaf Color
Green
Leaf Type
Opposite, ovate to lanceolate
Flower Size
3-5 mm
Weed Status
Yes
Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Toxic for humans
Yes
Rating: 4/5
Toxic for pets
Yes
Rating: 4/5
Edible
No
All parts of the plant are toxic if ingested, causing gastrointestinal upset, vomiting, and diarrhea. Skin contact can cause irritation or dermatitis.