Also known as Bitter Ash · Bitter Bush · Bitterwood
Safety note: This plant may be toxic to humans and pets. See toxicity details.
Quassia Wood (Quassia amara) is a small shrub or tree native to South America, known for its intensely bitter wood used in traditional medicine and as an insect repellent
At-a-glance light, water, soil, and growing conditions from plant data
Moderate to High
75% intensity
Prefers bright, indirect light. Can tolerate some direct morning sun.
Moderate
50% intensity
Keep soil consistently moist but not waterlogged.
Well-drained soil
50% intensity
Moderate
50% intensity
Thrives in temperatures between 18-25°C. Protect from frost.
Low
25% intensity
Fertilize lightly during the growing season only.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | Yes 4/5 intensity |
| Toxic for pets | Yes |
| Edible | No |
The bark and wood contain quassin, a bitter compound that can be toxic if ingested in large quantities. It is used medicinally but should be handled with care.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Quassia wood prefers consistently moist soil but dislikes waterlogged conditions. Water thoroughly when the top 2-3 cm of soil feels dry to the touch. Reduce watering slightly during cooler months to prevent root rot.
Ensure good drainage to avoid issues.
Prune Quassia wood primarily to maintain its shape and size, and to remove any dead or damaged branches. Light pruning can be done in spring before active growth begins. Avoid heavy pruning as it can stress the plant.
Propagation is typically done through seeds sown fresh, as they have a limited viability. Cuttings can also be taken from semi-hardwood in late summer.
Success rates can vary, and patience is often required for establishment.
Repot young Quassia wood plants every 1-2 years in spring, moving them to a slightly larger container with fresh, well-draining potting mix. Mature plants can be repotted less frequently, perhaps every 3-4 years, when root-bound.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Quassia Wood (Quassia amara)
Where Quassia Wood (Quassia amara) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Sapindales |
| Family | Simaroubaceae |
| Genus | Quassia |
| Species | Quassia amara |
Similar in genus Quassia
Answers based on plant encyclopedia data
