Bitter cassava is a tropical shrub from the euphorbiaceae family that produces starchy tuberous roots prized for cassava, tapioca, and other staple foods across the world. Native to Brazil, this milky-sapped plant grows 6 to 10 feet tall with distinctive palmately lobed leaves and reaches mature dimensions of 6 to 10 feet in both height and width. Hardy in zones 10-12 where it thrives year-round, it can also be grown as an annual in cooler climates if given 8-9 months of frost-free weather to develop harvestable roots. The showy seasonal blooms add visual interest while the plant remains evergreen in warm zones, combining ornamental appeal with serious food production potential.
Partial Sun
Moderate
10-12
120in H x 120in W
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Moderate
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Bitter cassava delivers dual purpose: ornamental tropical foliage paired with productive root crops that have sustained civilizations for centuries. The plant's palmately lobed medium green leaves, each lobe stretching 3 to 8 inches long, create an architectural presence in the garden even before harvest. In zones 10-12 it becomes a permanent fixture, but gardeners in cooler regions can still succeed by treating it as an annual, provided they offer uninterrupted warmth and patience through the 8-9 month growing window needed for roots to mature.
The tuberous roots are harvested and processed into cassava flour, tapioca starch, and other staple carbohydrate foods central to cuisines across Africa, South America, and Asia. The roots can be boiled, fried, or ground into flour for baking and cooking applications. Tapioca pearls, cassava chips, and cassava bread all derive from this plant's productive underground system, making it one of the world's most economically important root crops despite its tropical origin.
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In zones 10-12, transplant after danger of frost has passed into well-draining, fertile sandy soil in full sun to partial shade. Space plants 6 to 10 feet apart to allow for mature width. In zones 8-9, treat as an annual and transplant only after soil has warmed and all frost risk is eliminated, understanding the plant will require the full 8-9 month growing season to produce harvestable roots before fall frost arrives.
Cassava roots are ready for harvest after 8-9 months of continuous frost-free growth, typically 8-9 months from planting. Harvest by carefully digging around the base of the plant to expose the stout, elongated tuberous roots, then lift and separate them from the shrub. The roots should be fully sized and firm to the touch; they store well once lifted and can be used fresh or processed into flour and starch.
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“Bitter cassava carries one of agriculture's most important migration stories. Though native to Brazil, indigenous peoples of South America domesticated this plant centuries ago, recognizing its ability to produce reliable, storable calories in diverse climates. From there, cassava spread across tropical regions worldwide, becoming a foundational crop in Africa, Asia, and the Caribbean where it remains a dietary staple today. The plant's resilience and productivity made it invaluable to colonial trade routes and to communities seeking food security in marginal soils, transforming it from a regional crop into a global phenomenon that feeds hundreds of millions of people.”