Sort by. Having good air flow helps deter this. The only treatment for these nematodes is to remove infested plants to avoid its spread. Avoid overhead sprinkling. White Coating On Leaves Caused By Powdery Mildew Powdery mildews are caused by fungi that live on the surface cells of plants. Destroy the infested plants entirely, do not compost them. The most common reason begonia leaves rot is too frequent watering. Some begonias appear immune. Is this normal? hide. Log in or sign up to leave a comment Log In Sign Up. Planting too deep or planting with too many other plants close up to the stem can cause stem rot. The name Angel wings was given for the shape of their leaves that are kind of like Angel wings. Foliage: This species is a cane stemmed type Begonia that has thick stems and fairly large nodes. Above: Begonia rex ‘Red Tango’ mixes well with other shade- and humidity-loving plants such as asparagus ferns and geraniums. Flowers commonly bloom bright red to light pink in color. There are several practices that you’ve to carry out to ensure that your begonia is … no comments yet. Overwatering begonias causes their leaves to turn yellow, a process called … To prune, pinch the stems back to the first or second healthy bud from the tip. save. The Begonia maculata is a relatively fast grower and makes an excellent indoor houseplant or terrarium plant. Botrytis blight (Botrytis cinerea), also called stem rot or brown rot, causes brown, moist spots to form on the flowers, leaves or stems. View Entire Discussion (0 Comments) Others will develop brown, water-soaked spotting on the leaves. Humidity and bright light in winter increase the brightness of the foliage color. share. report. Some cultivars’ leaves will turn red. Besides occasional pruning, begonias don't require much more maintenance—they are … My begonia stem is turning red but it also sits in front of the sun a lot. Infected begonia leaves will be covered with a white or ash-gray powdery mold. Outdoors, water tuberous begonias in the garden with a drip system or a hose than drips directly into the soil. 0 comments. Tuberous begonias like to have space between them so that the air can circulate. A few will get brown lesions on the stems. However, just like any other plant, begonia might develop problems such as dropping leaves. The pinched leaves (with a little stem) can go on a bed of peat or other growing medium and will push roots from the stem point to produce a new plant. This is where the stems close to the base just turn to mush and rot off. Begonias are succulent plants with stems that are mostly water, which makes them very sensitive to moisture and fungus. Be the first to share what you think! 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). best. The begonia appears wilted but doesn’t recover after being watered. Cane begonias have these a-symmetrical angel wing leaves growing on long bamboo-like stems. Other common begonia issues include curling leaves, flowers turning brown, leaves turning brown, and leaves turning yellow. The infected begonia plant typically develops a gray, fuzzy mold as the blight progresses. Leaves are glossy and have a red outer edge on some varieties and a red underside. Polka dot Begonias are part of the so-called cane begonias. Begonias are known to be leggy so the foliage can be pinched off to encourage the shrub shape. 100% Upvoted. The lower leaves turn yellow and might drop. This forces the begonia to branch at the pinch point, resulting in more stems, flowers, and leaves. Polka Dot Begonia … Edge on some varieties and a red begonia stems turning red edge on some varieties and a red underside foliage can pinched. Angel wing leaves growing on long bamboo-like stems leggy so the foliage color a-symmetrical Angel wing leaves on! 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