My love of rex begonias began this summer when I purchased one from a local garden center that was displayed as a specialty annual. I read the tag (very important) and it indicated the plant should be placed in partial shade. I planted the rex begonia in a container and positioned it in a mostly shaded area. It was quite content as it thrived in its new environment. I watered the begonia when the soil was dry to the touch and supplemented with a liquid fertilizer around every 3-4 weeks.

Prior to the first frost, I decided that I could not part with this beautiful specimen and prepared to find its new location in my home. It had begun to outgrow its container, so the first step was to transplant it into a larger container. To my surprise, the begonia had a terrific root system and naturally began to divide in my hand. I examined the roots, and I was able to carefully divide it into 4 plants! I used a porous potting mix and placed the plants in their new containers with adequate drainage holes to ensure good water circulation indoors. Regular watering is vital when caring for a rex begonia. However, be careful not to overwater it. Before watering, allow the soil surface to become dry to the touch. Be careful not to fully dry out the soil because this can be fatal to the plant.

Rex begonias are relatively easy houseplants to care for and happy in many conditions, but it will let you know if it does not like its light, water, and soil conditions. Wilting leaves can be due to the soil being too dry or too wet, the soil not draining enough, or the plants need more light (but not intense light.) This plant likes to be provided with bright, indirect sun and kept away from direct sunlight. Rotate the plant frequently to expose it to equal light from all sides to display its best leaf color. A water-soluble fertilizer is recommended every two weeks for peak performance. The ideal daytime temperatures are 70 degrees and nighttime temperatures around 60 degrees.

Mealybugs can be an issue, but they can be prevented by keeping the plant well-trimmed and removing any dead leaves from the surface of the potting mix. Mealy bugs can be removed with cotton swabs soaked in alcohol. Powdery mildew, which is fuzzy white patches on the leaves, can be a problem with begonias. Botrytis fungal disease can also be a nuisance. This is exhibited as large, irregularly outlined brown spots on the leaves. An insecticidal soap can assist with alleviating powdery mildew and botrytis fungal disease. Removal of dead leaves promptly and providing good air circulation are good preventative measures.

Rex begonias can be toxic to cats and dogs if ingested. The best practice is to always keep houseplants out of reach of small children and pets.

Because it is a relatively short houseplant, rex begonia is perfect for desks and tabletops where its colorful, variegated foliage makes it a perfect contrast against other houseplants.

Whether you are looking for an exquisite houseplant or outdoor beauty for your patio garden, you can’t go wrong with rex begonia.