How to Grow Cassavas Growing cassava yuca successfully relies upon tropical climates and at least eight months of warm weather. The plant prefers well-drained soil and modest rainfall, but it can survive where soils are wet. Cassava roots do not tolerate freezing temperatures and the best growth is in full sun. Growing cassava yuca from start to harvest can take up to 18 months. The plants are started from propagules made from parts of mature stems. These are 2 to 3 inch (5 to 7.6 cm.) cuttings with several bud nodes along the length. Lay the cutting on prepared soil in a pot and keep lightly misted in a sunny location. Grow the cuttings indoors until temperatures outside are at least 70 degrees F. (21 C.). Transplant them outside when the cuttings have sprouted and have at least 2 inches (5 cm.) of growth. Cassava Plant Care Cassava plants produce huge ornamental lobed leaves. They can thrive in the summer as an annual in most regions of the United States. Warmer temperatures promote the most rapid growth. Good cassava plant care should include the use of a slow release fertilizer in spring. Keep the plants moderately moist. To preserve the plant, move it to a pot indoors before freezing temperatures. Overwinter cassava in a warm, well-lit location and transplant outside when soils heat back up.