The tuberous begonia stores food in its roots. Q: I recently purchased some begonias but the leaves and the flowers are turning black at the edges. Don’t fertilize in fall and winter. First of all we will mention the red begonia flower, which is usually favorite among all flower lovers. Tuberous begonias are perennial plants with full-bodied flowers in shades of white, yellow, orange and red. Treat your plant to a dilu ted liquid houseplant fertilizer every two weeks.This will give you bigger leaves and encourage blooms. However, just like any other plant, begonia might develop problems such as dropping leaves. Other common begonia issues include curling leaves, flowers turning brown, leaves turning brown, and leaves turning yellow. At the end of … Although certain varieties host blooms of pink, white, red, or orange, these hardy plants are often grown for their foliage. Begonia Leaves And Flowers Turning Black At Edges. This species of fungus only infects begonias, but it will spread readily between begonia plants. Powdery mildew also might affect the flowers of fibrous begonia varieties. The fungus feeds from the leaf cells, and needs the plant to survive. Here's what you need to know about these high-impact plants. Begonia leaves come in almost any color and pattern, and add texture and interest to the garden. A begonia with powdery mildew will have white, powdery or thread-like growths on the top surface of leaves. The most common colors of the begonia flower are red, pink, yellow, gold, white, purple and blue. If your tuberous begonia is not blooming, it may be due to bulb, location or care problems. As most other red flowers, the red begonia flower is a symbol of love and passion. Greasy spots might form on the underside of infected leaves. Fertilize. Tuning is a Dutch exporter and trader of cut flowers and plants, located across the street from the Aalsmeer Flower Auction. Now you will see what are their characteristics and symbolism. The Begonia maculata grows large clusters of white flowers on a single flower stem.. Want your indoor polka dot Begonia to bloom?. The fungus may additionally cover stems or flowers. Flowers on a Polka Dot Begonia. Question From: D. colapinto - Naugatuck, Connecticut, United States . Another common begonia disease is powdery mildew. Sounds like a fungal disease. A fungus (Erysiphe cichoracearum) causes powdery, white spots to form on both lower and upper leaf surfaces. There are several practices that you’ve to carry out to ensure that your begonia is healthy and strong. What may cause this and how can I fix this? Since 1931 we are specialized in sourcing and custom packing orders for both overseas and European destinations .