Water
Water regularly to keep the soil consistently moist, especially during dry periods. Avoid waterlogged conditions, as this can lead to root rot.
Allow the top inch of soil to dry out slightly between waterings for optimal health.
Also known as Common Copperleaf · Common Three-Seed-Mercury · Common Three-Seeded Mercury
Common Threeseed Mercury (Acalypha rhomboidea) is a variable annual weed found in disturbed soils, fields, and roadsides, blooming with inconspicuous flowers.
At-a-glance light, water, soil, and growing conditions from plant data
Full sun to partial shade
75% intensity
Prefers sunny locations but tolerates some shade.
Regular watering
50% intensity
Keep soil consistently moist, but not soggy.
Loam, Sand, Clay, Acidic, Neutral, Alkaline
50% intensity
Warm temperatures
50% intensity
Thrives in temperatures between 18-25°C; sensitive to frost.
Light feeding
25% intensity
Apply diluted balanced fertilizer once or twice in the growing season.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly to keep the soil consistently moist, especially during dry periods. Avoid waterlogged conditions, as this can lead to root rot.
Allow the top inch of soil to dry out slightly between waterings for optimal health.
Pruning is generally not necessary for Acalypha rhomboidea unless it becomes overgrown or to remove any dead or damaged stems. Light trimming can be done in spring to maintain a tidy appearance and encourage bushier growth.
Propagation is typically achieved through seeds sown directly in the garden after the last frost. Alternatively, stem cuttings can be taken in spring or summer and rooted in moist potting mix.
Acalypha rhomboidea is an annual or short-lived perennial and usually does not require frequent repotting. If grown in a container, repot only if it becomes root-bound, typically every 1-2 years in spring.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Common Threeseed Mercury (Acalypha rhomboidea)
Where Common Threeseed Mercury (Acalypha rhomboidea) is found

Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Malpighiales |
| Family | Euphorbiaceae |
| Genus | Acalypha |
| Species | Acalypha rhomboidea |
Similar in genus Acalypha
Answers based on plant encyclopedia data