Outdoors, where rex begonias are only hardy in U.S. Department of Agriculture plant hardiness zones 10 and 11, the plant prefers partial or even full shade, though some morning sunlight is fine. According to the University of California IPM Program, improper irrigation is among the most common causes of damage in plants. Stick your finger into the soil before you water to check for dampness. If you don't see insect pests, I wonder if slugs or snails are busy eating the leaves after dusk? Fading leaves on a Begonia rex is a sign of too much direct sunlight. Begonia stem and root rot, also called begonia pythium rot, is a very serious fungal disease. Large or gangly plants can be pruned into shape. Mealybugs, aphids, and caterpillars can also become a problem. Begonia maculata is a type of cane begonia that has thick stems that support spotted angel wing-shaped leaves. Why an Indoor Stephanotis Has Drooping Leaves, University of Illinois Extension: Rex Begonia, University of California IPM: Begonia — Begonia spp. Humidity is crucial to keeping your rex begonia happy, however, spraying the leaves can lead to spotting. You can keep them happy as houseplants or store them dormant over winter, as you would with other tender bulbs. White Coating On Leaves Caused By Powdery Mildew Powdery mildews are caused by fungi that live on the surface cells of plants. Rex Begonias are not difficult to divide and propagate, which comes in handy as individual plants usually don’t have a very long lifespan. The plant will very easily regrow from these, so if you snip off an inch or two of stem with some leaves attached like in the image below, you’re all set for success. It’s better to cluster your plants, so they can create their own humid environment, or use a pebble tray. These plants do require high humidity (more than 50 percent), which means it can be difficult to maintain rex begonias indoors over the winter. Bird of Paradise plants split their leaves to allow wind through as well. Houseplants forum: Holes on Begonia Rex leaves. Caterpillars and earwigs cause similar damage to slugs and snails. Though rex begonias love warm weather, they will not grow well in full sunlight. Rex begonias have high humidity needs, requiring levels around 50 percent or more. Keep water levels low enough that they do not touch the bottom of the pot. leomatty067 Dec 10, 2018 2:54 PM CST. Something is eating the leaves on my begonias and pansys, can't see any bugs, what can I spray on them? If it's flourishing, continue with what you were doing. Small, blisterlike spots appear on the leaves. Rex begonia (Begonia rex-cultorum) is a notoriously high maintenance frost tender perennial commonly grown indoors as a houseplant. Another thing that can cause your begonia to drop leaves is attack by worms. Home › Forums › Gardening Discussions › Flowers & Shrubs › Holes in my begonia leaves Tagged: begonias This topic contains 5 replies, has 4 voices, and was last updated by HaroldMe 3 years, 2 months ago. This plant is susceptible to fungal infections, mainly bacterial leaf spot. Rex Begonia Features: An Overview. To really play up the unique qualities of begonia rex, pair them with solid green plants with different textures or forms. Most rex begonias sold today are named hybrids, although they are not always labeled as such. Rex begonia hybrids have been developed to have unusual markings, leaf shapes, and colors. Rex begonias (Begonia rex) are tropical plants, prized for their colorfully patterned and intriguingly shaped leaves. When watering, try not to do this - begonias are fussy and do not like wet leaves. Like other begonia species and other tropical understory plants, the Rex enjoys a shaded, humid, and quiet environment to grow in. 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. Try to keep the soil evenly wet (not soggy). Introducing "One Thing": A New Video Series, Annuals that can be grown as a houseplant, South and Central America, Africa, southern Asia. Begonia Rex-cultorum group, (bah-GO-nyah). Outdoors, water tuberous begonias in the garden with a drip system or a hose than drips directly into the soil. Rex begonias can be temperamental and you just have to find the right conditions and balance for your plant. Rex begonia offers colorful foliage and is one of the most interesting indoor plants around. Rex begonias prefer light, rich soil. Marie Iannotti is an author, photographer, and speaker with 27 years of experience as a Cornell Cooperative Extension Horticulture Educator and Master Gardener, The Spruce uses cookies to provide you with a great user experience. In fall and winter, plants may undergo a natural dormancy if temperatures are low, dropping leaves and appearing dead. Michelle Wishhart is a writer based in Portland, Ore. She has been writing professionally since 2005, starting with her position as a staff arts writer for City on a Hill Press, an alternative weekly newspaper in Santa Cruz, Calif. An avid gardener, Wishhart worked as a Wholesale Nursery Grower at Encinal Nursery for two years. Rex begonia plants have calcium oxalate, which is toxic to dogs and cats. Repotting rex begonias each spring will ensure that they have plenty of soil to grow in, but they like to be a little bit pot bound. Most begonias are grown a s flowering pot plants, but the Rex begonia (Begonia rex-cultorum) is grown primarily for its brightly colored, variegated foliage. Too much food will make for a scraggly plant, so pay attention and adjust the feeding to suit your variety. Rex begonia requires a well draining, porous soil mix. Some have suggested that Monsteras create holes in their leaves to resist the strong winds of hurricanes. The leaf edges and undersides are covered with short red hairs. Root rot can be a problem in wet areas. Leaf spots of begonia are caused by a pathogen called Xanthomonas. In pots, be sure to provide drainage holes. Views: 2233, Replies: 2 » Jump to the end. Direct sunlight will bleach the leaves or cause sunscald, resulting in brown, dry tips or patches. Family Begoniaceae (Begonia Family), University of Arkansas Cooperative Extension: Houseplants -- Begonia, Missouri Botanical Garden: Begonia Rex-Cultorum, University of California IPM: Water Excess or Deficiency. Most rex begonias sold today are named hybrids, although they are not always labeled as such. Water sparingly if this happens; new, healthy leaves will appear in the spring. Many people collect and display several varieties. Remove mealybugs by dipping a cotton swab in rubbing alcohol and using it to wipe off the pests. They frequently have large leaves (up to 6 inches long) that are brightly colored in various shades of green, red, silver, and even purple. Also, if the soil goes from wet to dry to wet, this could cause leaf problems, too. Indoor plants require bright, indirect light. They come in a variety of forms including those that grow canes a little like branching bamboo, clump formers and others with rhizomatous creeping roots, those with the largest leaves are Begonia rex. The leaves grow on short leaf stalks, from the underground rhizome. A peat-based potting mix is ideal for containers. 5. There are hundreds of cultivars of B. rex to choose among, usually classified by leaf size—small (three inches or less), medium (three to six inches), or large (more than six inches). It doesn’t have to be the tip of the stem: any piece of 2″ or up will work. Rex Begonia. Many hybrid varieties are beautiful, but they are unlabeled or mislabeled, so be sure to ask questions so you know exactly what you're buying. To help prevent diseases and insects, keep the plant tidy by removing dead leaves and debris from the plant and the surface of the soil. Soft or droopy leaves accompanied by wet brown spots is a sign of infection by botrytis blight. A rex begonia suffering from mold may have discolored leaves with soft stems or patches of gray or black mold growing on the leaves. They will stop growing when temperatures dip below 58°F (14.4°C). Begonias Avoid overhead sprinkling. There are many different varieties of Rex begonia… According to the University of Illinois Extension, rex begonias with crispy brown leaf margins are usually suffering from low humidity levels. More popular than begonia blooms, the leaves of certain begonia varieties grow into mosaic patterns of varying colors. If your begonias are infected, the stems become waterlogged and collapse. You can increase humidity by running a humidifier in the room with the plant or by placing its pot on a shallow tray filled with water and pebbles. Begonias (Begonia) Posted by jmorth. Identify the cause of the fickle plant's distress and make the necessary adjustments to help the plant recover so it can exhibit the striking foliage rex begonias are famous for. Are admired for their showy, sometimes jaw-dropping leaf coloration topple over their Caterpillars... 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