Dieffenbachias thrive in bright, indirect light, and prefer temperatures between 65-85°F with high humidity. Water regularly, allowing the top inch of soil to dry out between waterings, and fertilize monthly during the growing season. The ideal soil is well-draining and slightly acidic. Avoid overwatering, as it can lead to root rot. Keep an eye out for common pests like aphids and mealybugs, and treat them promptly. Propagation can be done via stem cuttings or air layering. Popular varieties include D. amoena, D. maculata, D. picta, and D. seguine, each with unique leaf patterns and growth habits.