Unlock the secrets to thriving rex begonias: care tips & varieties

Published on 16/02/2026 08:49 in animals • Sarah Garcia

Rex begonia overview

The rex begonia, also known as painted-leaf or fancy-leaf begonia, boasts stunning large variegated leaves with vibrant hues of green, red, silver, and purple. These plants can grow up to 12 inches tall over several years.

Lighting requirements

Rex begonias need less light than other begonias in the family. Place them in a spot with bright, indirect sunlight year-round. If indoor lighting is limited, they also thrive under fluorescent lights.

Soil preferences

For best results, use a light, airy, fast-draining potting mix that allows the fine roots to breathe. Avoid dense, waterlogged soil that can lead to root rot.

Watering & humidity

Keep the soil consistently moist but not waterlogged. Allow the top layer to dry slightly between waterings. Rex begonias prefer a humid environment, but avoid getting the leaves wet, as this can encourage powdery mildew.

Temperature & growth

Rex begonias thrive in temperatures between 60°F and 70°F (15°C to 21°C). In colder climates, bring them indoors or provide supplemental heat to prevent damage. Growth may slow down in winter due to reduced light.

Propagation methods

  • Rhizome Division: Separate the rhizomes in the spring, replanting the divided sections in well-draining potting mix.
  • Leaf Cuttings: Take a leaf tip cutting, trim the base, apply rooting hormone, and plant it in moist soil. Keep it in a bright, humid location until roots develop.
  • Water Propagation: Similar to leaf cuttings, but place the petiole in water until roots form, then transfer to soil.

From 'Avatar' with its silvery leaves to 'Curly Fireflush' with its deep burgundy edges, there are countless rex begonia hybrids to explore. Check your local nursery or online plant retailers for the latest varieties and cultivars.

Buying tips & pest control

When purchasing a rex begonia, inspect the roots for signs of congestion, and the leaves for pests like spider mites, mealybugs, or scale. If you notice any issues, gently rinse the plant with water or treat with insecticidal soap.

Care in action: tips for success

Fertilize your rex begonia regularly with a balanced, water-soluble plant food. Prune back leggy stems to encourage bushier growth. Rotate the plant frequently to ensure even light exposure. With proper care, your rex begonia will thrive and provide years of beautiful foliage.