Rex begonias can be very demanding of just the right amount of water, food, and humidity. See a picture, learn about pests and diseases, and read answers to Begonia Rex plant care questions. In drier areas, they will appreciate being misted daily. Above: Begonia rex ‘Red Tango’ mixes well with other shade- and humidity-loving plants such as asparagus ferns and geraniums. This plant loves moisture, but it does not need frequent watering. You can cut back on water during their dormant period in the winter, watering only when the pot dries out. They look great outdoors in shady tropical gardens, but the most popular way to display rex begonias is to collect and group them together, each in its own pot. Despite its exotic looks, Rex begonia is actually easy to grow. Rhizomatous Begonia (Rex Begonia) ... To avoid this, watering should be done regularly once the top inch soil is nearly dry (6). Rex begonias need thorough watering but should not be overwatered. Disinfect a pair of bypass pruners with isopropyl rubbing alcohol to prevent spreading diseases from other garden plants to your begonias. Marie Iannotti is an author, photographer, and speaker with 27 years of experience as a Cornell Cooperative Extension Horticulture Educator and Master Gardener, 10 Top Outdoor Garden Plants That Thrive Indoors, 10 Varieties of Begonias for Gardens and Containers. Use a balanced formula such as 20-20-20, diluting it half-strength or about 1/4 teaspoon per gallon of water, but check your product label for further directions. Care of Begonia rex plants.. Its needs: Begonia Rex enjoys a position with good light, but not in direct sun or deep shade. Causes. How To Water Begonia Maculata. Small pink flowers are borne in winter. Be sure your garden beds or containers meet the requirements of the rex begonia. If your begonia rex has yellow leaves, chances are you have given it too much water. Too much food will make for a scraggly plant, so pay attention and adjust the feeding to suit your variety. Keeping small plants under glass can also keep them from drying out too quickly and reduce the need to water quite so much. If your Rex is growing where it only gets light from one side (i.e. To avoid these issues, be sure your begonias are in well-drained soil and water them sparingly. You can keep them happy as houseplants or store them dormant over winter, as you would with other tender bulbs. Since begonia plants are susceptible to root rot, it is important to use well-draining potting/growing media. To water propagate your Begonia, all you have to do is partially submerge the stem in water, leaving the leaves sticking out. Learn tips for creating your most beautiful (and bountiful) garden ever. Tall growing, up to 1-2m, these varieties bloom from mid-summer to mid-autumn with fleshy flowers like little chandeliers, in shades of pink, red, orange and white. Begonia Rex, how to grow plant care guide. Colour, texture and shape depends on variety. Trim Begonias. When grown indoors, the humidity can be increased by using a small room humidifier. It … Because it's a relatively short houseplant, Rex begonia is perfect for desks and tabletops where is wildly colorful, variegated foliage makes it a perfect contrast against other houseplants. How To Water A Rex Begonia Indoors Knowing when to water your Rex begonia is easy, although you will probably have to water weekly, especially during the growing season. Tip: Rex Begonias can also be propagated using stem and leaf cuttings. However, do not use tap water for misting – the high alkalinity of some tap water will cause the leaves of your plant to drop. Conditions: Considered perennials in tropical and semitropical climates, Rex begonias are frost tender and typically grown as annuals or houseplants in North America. Lay the Begonia rex plant’s roots on a paper towel. Growing Rex Begonias Indoors. Cane stemmed begonias. The outer edges of the leaf are typically a dark green while the inner portion can be colored shades of pink, red, silver, or purple. Turn the begonia leaf back over and press it into the seed-starting mix. The best way to achieve this is to let the soil dry between watering, but sit it next to a humidifier or in a humid area. Although they are at home in a shady garden, they are also popular as houseplants. Large or gangly plants can be pruned into shape. Too much water will lead to root rot or a limp plant. Humidity is crucial to keeping your rex begonia happy, however, spraying the leaves can lead to spotting. Rex begonias are rhizomatous begonias. Fertilizing a hanging begonia every other time you give it water helps keep the plant growing and flowering during it active season, usually from spring until early fall. They like moist soil, but it cannot be too wet or fungal diseases could occur. Use as many as you need to hold the leaf flat. Don’t water the leaves, only the soil to avoid fungal disease issues. Don’t feed at all during the winter. Height: varies according to type, from 15cm–2m. A mixture of peat with a small amount of gardening soil and perlite would be perfect for begonias. Instead, use distilled water, which is mineral-free. Plants will vary and the only way to know what your plant wants is to watch it, once it has adjusted to its new surrounding. Andrea DeShazo has been writing and editing lifestyle articles since 2003. Rex begonia care indoors can be a little tricky, but it is certainly possible to grow beautiful specimens if you understand the plant’s needs. If you keep your potted begonia on a dish, water will collect in the dish after watering. There are many different varieties of Rex begonia, including hybrid varieties, available. Avoid putting a pin through a main leaf vein, or that vein may not root. Ensuring good soil drainage will go a long way towards alleviating this issue. drained water out of any trays or saucers immediately after watering Origin: The initial species, B. rex, originated in the forests of northern India.Today, there are countless cultivars derived from this species enjoyed around the world. Begonia rex is sensitive to temperature changes and to temperatures below about 60 degrees Fahrenheit (16 Celsius). In pots, be sure to provide drainage holes. Rex and other rhizomatous begonia During summer keep plants shaded and watered freely but with good drainage and high relative humidity (humid atmosphere) Do not wet the leaves or the crown During winter reduce watering, allowing the surface of the compost to dry out before watering again The main rule of thumb for watering begonias is to not let the soil dry out completely. Among the various types of begonias, the Begonia rex are some of the most beautiful and stunning plants. Colour, texture and shape depends on variety. Rex begonia plant showing leaf detail. Name: begonia, wax begonia, bedding begonia, rex begonia, Begonia sp. Rex begonia offers colorful foliage and is one of the most interesting indoor plants around. A peat-based potting mix is ideal for containers. Eventually, you'll figure out the right balance. If you have a variety of rex begonia that goes dormant in winter, water sparingly until spring when new growth begins. Avoid direct sunlight. Keep a close eye on the weather forecast during the fall and be ready to move your begonia pots indoors when the evenings become chilly. Bacterial leaf spot, mildew, and botrytis can occur if the leaves stay wet. Since you have to wait for the roots to dry, go ahead and get the plant pot ready. Step 4: Pin the rex begonia leaf into seed-starting mix. Stick your finger into the soil, and if it dry to your first knuckle, it's time to water. Rex begonia hybrids have been developed to have unusual markings, leaf shapes, and colors. Look at the container’s soil and if the top has just dried, water until it runs out of the pot’s bottom drain holes. The painted leaf begonia can grow up to 24 inches tall. Full sun to partial shade. Depending on the cultivar, the Rex begonia plant can reach from 12 to 24 inches in height and spread. These plants are grown almost exclusively … 50cm spread . Begonia types . They enjoy partial to deep shade and are a great addition to a shady spot in your garden due to the incredible variety and beauty of their foliage, which more than compensates for their modest flowers. Climate: tropical and sub-tropical, temperate with protection, frost tender. Water rex begonias when the soil just begins to dry out, usually about once per week. Slightly moist soil is ideal for painted leaf begonias, but excess moisture will cause root rot, so make sure the water drains properly from the pot and you empty the saucer of excess water. If it's flourishing, continue with what you were doing. There are more than 1,300 species in the begonia plant family. Even in zones where begonias are hardy in the ground, the plants will go dormant for a period of time in winter. To really play up the unique qualities of begonia rex, pair them with solid green plants with different textures or forms. Foliage: olive to bright green, bronze to red. If you live in an area that's prone to flooding, growing your begonias in a pot will give you the option of bringing them under shelter in rain. Trailing begonias in hanging planters can start appearing leggy as the season progresses and the stems get longer. Often beautifully marked and covered in fine hairs. It’s better to cluster your plants, so they can create their own humid environment, or use a pebble tray. If it is droopy or gangly, adjust the light and water. Begonias like a decent amount of humidity without constantly moist soil, and they need a container with good drainage. Begonia rex has large, metallic green leaves with splashes of silver on the upper surface, and a reddish tone beneath. Sometimes called painted-leaf begonias or fancy-leaf begonias, these plants are known for their showy, sometimes jaw-dropping leaf coloration. Rex begonias are known for their colorful and textured leaves. The leaf edges and undersides are covered with short red hairs. Then, to keep the cuts in contact with the mix, start pushing T-pins through the leaf into the soil. In most cases, a spray form of pesticide will take care of the issue. When this occurs, water only once every 3 to 4 weeks until growth begins again in the spring. Plant size. When planting directly in the ground, a moist, well-drained location is optimal and mulch will keep the roots shaded. Watering The Rex Begonia. Be sure to allow for air circulation when plants are permanently housed under glass. Rich but open potting mix, kept moist during growing season. Rotating potted rex begonias will keep the plants full and stocky. One of the most popular is B. coccinea, which has pendulous heart-shaped leaves with red undersides and margins. Mealybugs, aphids, and caterpillars can also become a problem. Climate: tropical and sub-tropical, temperate with protection, frost tender. You can feed your potted plants monthly with any good houseplant food. The clumping growth habit of Rex Begonias, coupled with their tightly packed leaves, makes for a dense plant. Then, place the vase or glass containing the plant in a light and warm spot to provide the perfect growing conditions. If begonia is grown in room conditions, it just needs to be watered properly. Learn lighting needs and how to identify, water, feed, and propagate a Begonia Rex plant, also called a Painted Leaf Begonia or Fancy Leafed Begonia. Using a spray bottle to regularly mist around the plant without saturating the soil is another option.