Growing your own tuberous begonias will give you the greatest selection to choose from. In autumn, dig up tuberous begonias and store in a cool, frost-free spot for winter. Growing begonias couldnât be easier. Begonias are native to all parts of the world except Australia and Europe. Tuberous begonias grow from tubers, much like potatoes, and reach their peak in late summer and autumn. Avoid watering the foliage to help prevent rot and disease. Sometimes it's only for the winter months, but for ⦠Begonias for the garden have different cultivation needs so the notes below will help guide you to success. Begonias with fibrous roots usually have round leaves. Plant tuberous begonias outdoors after the danger of frost is past. Some types, like rex begonias, are easier to grow from root or leaf cuttings, but the experience of starting other types from seed is lots of fun. Begonias are frost sensitive and do not do well in temperatures below freezing. Growing Begonias from Tubers. The foliage is similar to tuberous begonias with small flowers in shades of pink or white. Most grow to 30â50cm tall, although some varieties can reach 80cm. Wax begonias happily grow into small shrubs if allowed to, reaching a maximum height of about 18 inches, depending on the cultivar and species. This group includes Begonia schargii and B. metallica. They are also sometimes called elatior begonias, although this is the same plant as the Rieger begonia. Tuberous begonias by the end of the season are very juicy, and plump and fragile. Tuberous begonias are cold-sensitive and will survive outdoors only in frost-free areas of USDA hardiness zones 9 and 10. They will develop a tuber that can be lifted in fall and overwintered indoors. A rhizome is basically a thickened stem, and the leaves emerge from the rhizome. Repotting . Flowers may be single or double, plain, ruffled or toothed. The original plant was a cross between a standard wax begonia and a tuberous begonia and has since evolved into a thriving category of its own. Brighten those gray days of winter by growing a few beautiful begonias indoors. Species with fleshy roots â with asymmetric heart-shaped leaves with serrated edges. Of the two, wax begonias are the easiest to grow from seed. Keep the cutting in an air-tight environment - as outlined above - until rooted. Rhizomatous: This type is mostly grown for interesting foliage and preferably as ⦠Therefore the majority of gardeners in the United States start their begonias indoors in March and April. 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. Tuberous begonias are lush, shade-loving plants with thick, waxy leaves and big, rose-like flowers in beautiful colors. Begonias for growing indoors are divided into four main groups. Planting and Growing Tuberous Begonia Plants Begonias should be grown in partial sun or light shade and planted in a sandy soil mix that contains added peat moss and compost.They can be planted directly in the garden after all danger of frost has passed, or started indoors about 8 weeks before the last killing frost. Tuberous begonias: Another popular type, tuberous begonias have spectacular colorful flowers, and are particularly showy in hanging baskets or containers. The Rieger begonia is also known as the Begonia x hiemalis or hiemalis begonia. Begonias are generally hardy in zones 9 & 10, and in colder zones (2 - 8), they can be grown as annuals and overwintered indoors to grow year after year. The third group â tuberous begonias that make up the tuber in the ground and in need of a winter alone. How to start begonia tubers Select firm tubers with brown skin and a depression on the top side and choose a spot thatâs about 70 degrees F, with bright, filtered light â an east window is ⦠Growing Tuberous Begonias. The initial very slow growth of begonia seedlings means you really have to start them very early in the season if you want to use them in your garden the first year. When trying to start begonias from seed for the first time, I recommend beginning with wax begonias, Dragon wing begonias, Angel wing begonias, cascading begonias or tuberous begonias. Start the begonias indoors a month before the last frost. Growing Rex Begonias Indoors. The South American species have been bred in England since the 1860âs and we can now enjoy many colourful varieties. You want to be careful not to damage themâwhich is another reason that a plunged pot is a safer method. Our patience usually runs out far before Old Man Frost is ready to move on. Get Growing: Starting Begonias Indoors. They bloom throughout the summer, thriving in shady spots where few other plants with ⦠As a general rule, begonias favour bright filtered light with no exposure to harsh midday sun. Rex begonias are rhizomatous begonias. I actually leave them in their pots over the winter, at a coolish temperature (maybe 50ish degrees) and ⦠Like tuberous begonias, most fibrous begonias cannot survive temperatures below 45 °F (7 °C). Starting plants indoors lets you get a head start on the gardening season and also scratches the gardenerâs itch in those last few weeks of winter. Cane begonias: Tuberous begonias have beautiful rose like flowers in a wide variety of colours and forms. Choose a site sheltered from strong winds. Grow as houseplants or for borders. Water regularly and feed weekly with a high potash fertiliser like tomato feed. Tuberous begonias are perfect for growing in pots, while fibrous rooted types are best for bedding displays and hanging begonias are best suited to hanging basket displays. Container-grown begonias (Begonia spp.) Buy good stock, firm to the touch. However, if started in winter, the plants will reward you with large, colorful blooms the following summer. If thereâs plenty of room in the existing pot thereâs no need to repot into a larger one; just remove ¼ to ½ an inch of soil from the top and an inch from the ⦠The Tuberous Begonias (right) are popular with outdoors gardeners because of the wonderful flower display they put on over the Summer that last for months and months. Tuberous begonias perform best in moist, well-drained soils in partial shade. Bring your begonias in at night when temperatures fall below 50 °F (10 °C). Move outdoor potted Begonias indoors ⦠A comprehensive guide for growing begonias from seed indoors. 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