In 1856, in a shipment of orchids to England, someone noticed an exotic and mysterious plant with elaborate foliage growing at one of the orchid’s bases. You can feed Rex Begonias every two weeks or so using a diluted regular balanced houseplant fertilizer during the growing season (Spring through Fall). The Rex begonias I bought in fall have lost their leaves. You can feed your potted plants monthly with any good houseplant food. You can cut back on water during their dormant period in the winter, watering only when the pot dries out. Marked by dramatic colors - often a mix of green, pink or burgundy - the Rex Begonia can also include metallic shades of grayish silver. But doing this can mean accidentally over-watering your plant. a window sill), turn the pot ¼ each week to maintain even growth. Rex Begonia’s are also called looking glass plants. Every three months, apply a controlled release fertilizer. To control an outbreak, simply soak a cotton ball, cotton swab, or artist’s paintbrush in alcohol and dab the mealy bugs off the plant. According to the American Begonia Society, all types of the Rex cultorum, or rex begonia, are descendants of the Indian species first introduced to cultivation as B. rex in the 1850s. Decrease fertilizing when fall arrives and stop in winter. Too much food will make for a scraggly plant, so pay attention and adjust the feeding to suit your variety. Leaves grow from rhizomes. Rich but open potting mix, kept moist during growing season. You can cut back on water during their dormant period in the winter, watering only when the pot dries out. The leaf edges and undersides are covered with short red hairs. Care: Regular dilute feed with a foliage specific-fertiliser. Plants require high humidity, about 50 to 60 percent. Enjoy your stay at Smart Garden Guide. Begonia rex-cultorum is a name applied to a group of cultivated begonias known as rex begonias. The leaf blight affects the lower leaves that have contact with the soil and shows up as water-soaked, dark lesions developing, which grow larger over time. Begonia rex is the basis for many hundreds of hybrids, and its forms are too numerous to count. The soil should be porous. Beefsteak Begonia | Begonia erythrophylla care & info. Escargot begonias (Begonia rex) are a variety of rex begonia that produces spiral-shaped foliage that curls around at the base of the leaf. Begonia Rex-cultorum group, (bah-GO-nyah). Rex Begonias are admired for their fabulous foliage. are available in many different varieties, including Rex, wax, tuberous and cane-stemmed types. Place a humidifier near the plant, or place the plant on a shallow tray filled with water and pebbles to … Most varieties grow best in a mild temperature range, between 15°C and 26°C, though tuberous begonias need it a little cooler to perform at their best. The small pale pink flowers are an added bonus. All rex begonias include the wild species B. rex in their parentage. It’s best to discard the plant and start over with a healthy one. Protect from direct sun to avoid scorching leaves; Maintain good levels of humidity by standing the container on tray of gravel, expanded clay granules (Hydroleca) or recycled lightweight aggregate (Hortag) and keep moist, with the water … You can also use a general-purpose potting mix, if you cannot find a peat-based mixture. Award-winning Begonia 'Fireworks' is an evergreen, rhizomatous perennial of upright habit, mostly grown for its vibrant foliage of large, bold leaves adorned with dark purple centers, purple-pink margins and iridescent silver-white between. Award-winning Begonia 'Fireworks' is an evergreen, rhizomatous perennial of upright habit, mostly grown for its vibrant foliage of large, bold leaves adorned with dark purple centers, purple-pink margins and iridescent silver-white between. 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