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A Guide to Grow and Care for Rex Begonias

Rex Begonias are the most beautiful flowers. There are a lot of varieties of Rex Begonias to choose from. These plants require different growing conditions and climates. Here is a guide to grow and care for Rex Begonias.

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Rex Begonias are the most beautiful flowers. There are a lot of varieties of Rex Begonias to choose from. These plants require different growing conditions and climates. Here is a guide to grow and care for Rex Begonias. 

Begonias are among those helpful plants where the appropriate name is also the common name. The variety is found in the jungles and subtropics, especially in the Americas, and is comprised of around 900 species with 130-odd in growing, from which numerous cultivars and mixtures have been created.

Rex Begonias produce a variety of up to 48 leaves. These plants grow best in concealed conditions and incline toward the kind of soil found on woodland floors. The rex begonia is the big kind of begonias.

Rex Begonias nearly look like coleus and have a flower that is like the coleus. They have exceptionally enormous bright leaves. Rex Begonias are typically rhizomatous.

However, they are frequently viewed as a different class because their gem-conditioned foliage requests more warmth and more prominent dampness than do different kinds of rhizomatous begonias.

Rex Begonias Overview

  • Botanical Name: Begonia rex-cultorum
  • Common Name: Rex Begonia
  • Family: Begoniaceae
  • Flower Color: Not grown for flowers
  • Mature Size: 12-18 in. tall, similar spread
  • Plant Type: Herbaceous perennial
  • Sun Exposure: Partly shade to full shade
  • Soil pH: 5.7-6.2 (more acidic)
  • Soil Type: Porous
  • Bloom Time: Not grown for flowers
  • Native Area: Southern China, Northeastern India, and Vietnam
  • Hardiness Zones: 10-12 (USDA)
  • Toxicity: Toxic to animals

Rex Begonia Care

Rex Begonia plants are found practically in each size, shape, and shading. It is a touch harder to give an overall thought of a system that is simple and which bodes well.

The most favored kinds give a person a good idea since nothing makes a vital scope of plants to which it has a place. Keep the following points in mind while growing Rex Begonia plants: 


A high-draining soil is essential for a Begonia rex. However, plant them in a permeable, well-draining preparing blend in with peat greenery and leaf shape. Rather than holding all that pointless water, permeable soil empowers it to deplete.

Permeable soil can likewise assist your plant with keeping up with the sodden soil it needs to thrive. Furthermore, save the plant from root decay while keeping it adequately hydrated. Rex Begonias also grow in African violet preparing blends.


Rex Begonias are not very fastidious with regards to light. They are an undergrowth species. However, remember not to shoot them with an excessive amount of direct sun. Keep them in a place where they gets brilliant, backhanded light or under bright lights.


Begonia rex should be watered when the soil or pot feels dry, yet don't delay until the plant starts to shrink. You can scale back water during their torpid period in the colder time of year, watering just when the pot dries out.

Moistness is critical to keeping your rex begonia glad, however, showering the leaves can prompt spots. It's smarter to bunch your plants, so they can establish their moist climate or utilize a rock plate.


Rex Begonias do best in a generally warm climate. Room temperature functions admirably for them. Indeed, you can quit growing or even go torpid, and drop every one of their leaves if temperatures drop excessively low (particularly during fall/winter time).

It means it's a smart thought to get this species far from crisp windows thinking you need it to keep up with its delightful foliage all year.


In the same way as other houseplants, Rex Begonias like a muggy climate, which is not in every case simple to give. These plants may like being put in the restroom. The air here can be somewhat damper than the remainder of your home.


You can take care of your pruned plants monthly with any great houseplant food. An excessive amount of food will make for a scraggly plant, so focus and change the taking care of it to suit your kinds.

Rex Begonias can be sensitive, and you need to track down the right conditions and equilibrium for your plant. Do not take care of the slightest bit throughout the colder time of year.

Types of Rex Begonias

The following are a couple of our most famous begonia plants that clients love:

An energetic cultivator, Begonia 'Amelia's Kaleidoscope' highlights coppery-bronze adolescent leaves that have grown to chartreuse-lime with a beautifying netting design.

Begonia 'Richardsiana' has a little maple-molded leaf, and it flowers uninhibitedly from spring to fall with the silvery-white blooms balancing like gems among the rambling branches. Ideal for bonsai or just pruned on the windowsill, this semi-tuberous species from South Africa carries a designed structure to the indoor garden.

Propagating Rex Begonia

Rex Begonias are not hard to partition and proliferate, which proves to be useful as individual plants ordinarily don't have an extremely long life expectancy.

By propagating plants, you can keep on appreciating them consistently. The least demanding strategy to transform one Rex Begonia into (at least two) Rex Begonias is by partitioning the rhizome.

You can do this while repotting the plant or at some other time (even though it'll be slower during winter). You should only pull the rhizomes separated and repot every one of them into their holders.

Potting and Repotting of Rex Begonias

Plant Rex Begonia transfers 6 to 8 inches separated and others as indicated by their experienced size. Tubers can be begun inside by putting the tubers, empty side up, 1 inch separated in a shallow plate with wet preparing blend.

Spot the plate in a dull room and water barely enough to keep the preparing blend clammy, yet not saturated. Tubers should grow in around a month and be moved to a space with splendid light once the fledglings are about an inch tall. Possibly plant outside when there could be presently not a danger of ice.

Repotting Rex Begonias each spring will guarantee that they have a lot of soil to grow in. Big or bumbling plants can be pruned into shape. Pivoting pruned Rex Begonias will keep the plants full and stocky.

Common Pests and Plant Diseases of Rex Begonias

  • Bacterial Leaf Spot, Mildew, and Botrytis

These issues regularly result from continually wetting the leaves. Root decay may likewise happen when focusing on your rex begonia in wet areas. To prevent these issues, make a point to grow them in all-around depleted soil.

  • Caterpillars, Aphids, and Mealybugs

These bugs may likewise swarm your rex begonia. You can frequently take care of this issue by utilizing an insecticidal cleanser as a splash for the bugs. Put a slug trap near the plant, as well, to dispose of snails and slugs.

  • Common Problems with Rex Begonias

Wet leaves can foster bacterial leaf spots, botrytis, or mold. To prevent this water promptly in the day, give the passes on schedule to dry before the cooler evening temperatures show up. Also, attempt to water simply the foundation of the plant. It helps with keeping the leaves dry. If the soil is too wet, Rex Begonia can likewise foster root decay.


Are Rex Begonias simple to care?

Rex Begonias are appreciated for their remarkable foliage. The cultivar offers a variety of tones, surfaces, and shapes. Local to tropical districts, as houseplants, Rex Begonias are laid back - they are as simple to care about as they are good-looking.

How quickly do Rex Begonias grow?

Rex Begonias grow at a medium speed. However, they like a pot with space to grow, so you will not have to stress over repotting time and again.

How long can Rex Begonias live?

Most begonias will only live 2-3 years, even with heavenly consideration. Hence, you can save the effort to engender your rex begonia, particularly assuming it is a fascinating cultivar that you would prefer not to leave behind.

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Elissa Sanci
Elissa Sanci
Elissa Sanci, the owner of the website, and senior writer of New York Garden; graduated from Santa Barbara City College – a famous public school in California with many diverse training professions, and she majored in horticulture.