It's an elegant and eye-catching houseplant variety. These shade-loving plants bring mounds of color when planted under trees or tucked in planters, hanging baskets, or window boxes. Learn more about Rex and other types of begonias. Among the various types of begonias, the Begonia rex are some of the most beautiful and stunning plants. Plants require high humidity, about 50 to 60 percent. Begonia is a genus of perennial flowering plants in the family Begoniaceae.The genus contains more than 1,800 different plant species. Begonia blancii Begonia blancii variegata Begonia bowerae Begonia brevirimosa Begonia carolineifolia Begonia chloroneura Begonia crassicaulis Begonia dichotoma Begonia dregei Begonia … Wax begonias are typically grown as annuals, reaching 6 … Commonly sold as indoor plants, they prefer cool temperatures and are most commonly available in winter and early spring. The leaves of Rex begonias can grow up to 9 inches long and 5 inches across, while the plants normally reach heights of 1 to 1 1/2 feet tall. Currently backordered. Salsa Rex begonia is a silver-leaf type that's variegated with shades of green and burgundy-red. Purchase plants free of the disease. Leaves grow from rhizomes. All Rights Reserved. You May Also Like: Alocasia Black Velvet Care (Alocasia Reginula) Rex Begonias Can Be Grown Indoors Or Outdoors See all of our most popular Begonia Rex varieties, including Escargot Place order now to receive when available. They are, however, not the easiest of begonias to grow, require a humidity of around 69% and are best grown in protected areas. The most popular types are are Cane, Rhizomatous and Tuberous Begonias. Red Kiss Rex begonia grows about 8 inches tall and wide. add to cart.