To learn more and see recommended planting dates, you may be interested in reading. Tubers can be saved over winter and replanted in spring. Plant tubers indoors in spring in pots just deep enough to cover the tubers; plant 2 to 4 weeks before the last frost date. Unfortunately, you cannot grow more tuberous begonias by cutting up the tubers like you can with potatoes but you can grow new plants from cuttings. If your begonias are in the ground, you’ll need to dig up the tubers so they are not in danger of rotting during the winter. For earlier blooms, start your begonias indoors, eight weeks before the last frost date. POSITION . For earlier blooms, start your begonias indoors, eight weeks before the last frost date. Pots must have drainage holes on the bottom, so the roots can breathe, and excess water can drain away. KNOW WHEN TO PLANT Tuberous begonias are sensitive to cold and should not be put outdoors until the nights are above 50°F. Tuberous begonias are suitable options for begonia container gardens as they work well with the light texture of potting mix, and they work as bedding plants, too. Wouldn’t the showy blooms here make you take a second look? At the first sign of a white patch on any of the leaves apply a fungicide right away. The tubers should be covered with no more than an inch of soil, whether you plant them in the ground or in pots. Carefully dig up the tuberous begonias within a few days of a killing frost. Pinch off brown, water-soaked stems or leaves. Put them in a warm (70°F) area with indirect light. You'll love these easy-care begonia bulbs for container gardens, landscape beds, and hanging baskets. Tuberous begonias are available at most garden centers at spring planting time. between the tuber and the pot edge. Feed tuberous begonias weekly with tomato feed in summer, especially pot-grown plants. Grow tuberous begonias in humus-rich, moist, but very well-drained soil. Tuberous begonias prefer the filtered light beneath high trees, or at least 4 hours of morning sun. First, there are upright and pendulous forms. In most areas, come fall before frost has nipped the plants, remove tubers from containers or beds and let them dry in an airy, shady place indoors. Stop watering and let the plants die back naturally. Staking When upright varieties are 4–6″ tall, push a heavy, 18–20″ long bamboo stake (or one of our cushioned, steel Begonia Stakes - Set of 5 ) into the potting mix or garden soil on the side of the plant opposite the points of the leaves. Pinch out the single female blooms so plants can put more energy into the petal-filled double male flowers. Others have simply never tried. For photos, see: Tuberous Begonias: Which End is Up? Some varieties of begonia houseplants are grown for their flowers while others are grown for their striking foliage. To learn more and see recommended planting dates, you may be interested in reading Starting Tuberous Begonias Indoors. Hang a few baskets of tuberous begonias (Begonia tuberhybrida) on your front porch and you’ll notice that folks will slow down as they pass to enjoy the begonias. Tuberous begonias are one of the wonders of the flower world. Use stretch-ties to avoid damaging the stems. Active Interest Media Holdco, Inc. © Copyright 2021. If the plants start dropping flowers or wilting, it means the soil is either too wet or too dry. For best results, encourage the tubers to sprout before planting them in pots or in the garden. Flowering slows down, and the foliage will start to yellow. However, you can also purchase tubers and plant them indoors six to eight weeks before the last expected frost date in your area. Providing good air circulation and removing spent blossoms and wilted leaves, will help your plants stay healthy. Do not plant in full sun or full shade. Growing the tubers is a fun late winter project. Planting: Tubers should be planted concave side up. If the plants are in pots, simply stop watering and move the pots to an area where the soil will stay completely dry during the winter. Use code: SPRING21. If any are shriveling, moisten them with a spray of water. If you are growing them in pots, use a high quality, humus-rich growing mix. Grow tuberous begonias in a spot with lots of air movement around their foliage to prevent them from getting powdery mildew, which looks … When you thin out the stems in the spring, you can root those stems. Begonias prefer morning or late-afternoon sun — direct, hot sun can burn the foliage and flowers. Plant tubers in small pots of damp peat moss. Try to water the soil around the plants rather than the plants themselves, to avoid mildew. Set the tubers, depression side up, on damp peat moss eight to 10 weeks before the last frost. Tuberous Begonias will not grow well in deep shade. When the plants have one or two leaves, transplant them into individual 8” pots or combine several in a larger container. Starting tuberous begonias from seed is certainly an option, but will take time and expertise to bring the seedlings to flowering plant size. Upright types with large flowers benefit from being staked. Just line them up on a windowsill until they sprout, then plant them in small pots. Here are some supplies and tools we find essential in our everyday work in the garden. Remember that tuberous begonias have a front side. Then pink sprouts will grow on top of the tuber. Begonias need to be watered consistently. Feed Begonias with a well-balanced plant food every 2 to 3 weeks. Be careful not to overwater. Lets take a look at how to care for begonias as houseplants. A begonia tuber is shaped like a little brown bowl. Begonias grow well in a variety of containers, as long as there is adequate drainage. The tubers may remain right in the pots. Warmth, light and a little moisture is all they need. The flowers, leaves, and stems of tuberous begonias (Begonia X Tuberosa) are edible and can range from sweet to tart.The stems can be used in place of rhubarb since both plants contain the same substance known as oxalic acid, which gives them the tart flavor. Place the begonias into the holes and lightly pat soil around the tubers. For best results, encourage the tubers to sprout before planting them in pots or in the garden. Pinch off all but two or three sprouts as they grow. Use a weak solution of a low-nitrogen/high-phosphorus fertilizer at two-week intervals. Your choices don’t stop there. 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. Here’s how to grow tuberous begonias. In general, begonia plants can be placed in sunny areas with indirect light (6). Plant tuberous begonias in a bed that receives filtered sun or dappled shade, in spring after frost danger is past. Check your begonias often during hot, dry weather. Fill your desired containers with well-draining potting soil. Fill a container with vermiculite and moisten it. These lush plants have attractive foliage and big, rose-like flowers that bloom continuously from midsummer to frost. Place the pan in a heated propagator, and maintain a temperature of 60°-70°F (15°-21°C). When the pendulous varieties have 2 in. Sow in a clay half pot or pan, and when using a soilless compost it should not be firmed down. The blossoms face the same direction that the leaves point, so plant with the leaf points facing the bed’s front. Stake stems as required. Plant indoor begonias in a good indoor potting soil. Wherever you plant them, begonias like light, well-drained soil. If the plants start dropping flowers or wilting, it means the soil is either too wet or too dry. A good rule of thumb is to keep 2 in. How to Grow Tuberous Begonias From Cuttings. In warm climates, begonias will begin to enter dormancy in late fall. Start tuberous begonias from dormant tubers in winter or spring or you can buy them in the spring as started plants. How to Grow Celosia You Might Also Like: They are also prone to rotting, especially since their tuber is concave and collects water. When potting your begonias, you should keep three factors in mind: the type of soil, the size of pot, and the amount of soil you use. Then spray right away with a fungicide. Begonias are a popular houseplant. Water tuberous begonias once per week to keep the soil consistently moist, but only on weeks that do not receive rainfall. Grow in well-drained containers. Place the tubers in a cool, dry area to cure for 2 to 3 weeks. Begonia tubers are available from March through May. Put them in a warm (70°F) area with indirect light. Between mid winter and early spring is the time to repot or plant tuberous begonias. Choose a planting site with well-drained soil and indirect sunlight for most of the day. Cut off the stems about 1 inch above the tubers. See our full selection HERE. See our full selection, Click here to view all 0 items in your cart, *15% Off Spring Pre-Orders! 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. Colorful Windowbox Plantings. Once you decide to add tuberous begonias to your garden, you’ll have lots of options to choose from. Place the tubers an inch (2.5 cm.) Through the winter, if you find any tubers that are rooting or rotting, change the shavings and move them to a drier location for a few weeks. Sprouts emerge from inside the cupped area and roots form on all sides of the tuber. Tuberous begonias have male and female flowers. Fortunately, you can control both by watering only the soil and not the foliage, letting the soil dry between waterings and providing good air circulation. Growing begonias as houseplants only requires a little bit of knowledge in order to keep them looking their very best indoors. 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. Most tuberous begonias have an upright growth habit, but there are also cascading types that are perfect for hanging baskets. Too much shade can cause them to grow spindly. have carefully selected these products for their usefulness and quality. They like humidity and warmth, but can’t tolerate extreme heat, dryness or frost. tall, like the ones in the back in the photo above, it’s time to transplant. In addition to flower variations, there are many shades of green, burgundy and bronze foliage. Sign up now for exclusive offersand priceless garden information. Fill containers with fine-textured potting mix and moisten it. Sprouts emerge from inside the cupped area and roots form on all sides of the tuber. Best Foliage Plants for Containers Small red buds will appear within a few weeks, followed by sprouts. If the plants are in pots, move the pots to a protected location before risk of frost. Some species, such as wax begonias, can tolerate direct sunlight, but some, like tuberous begonias, prefer more shade. Begonias are tropical plants, but their foliage and flowers can be damaged by too much sun, and they will not grow in hot, dry weather. Turn the pot on its side so it won’t collect water and store it where it won’t freeze. If you are planting directly into the garden, position the sprouted tubers about 5” apart and cover them with 1” of soil. Once tuberous begonias start blooming, they can flower continuously for four months. 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. Focus your watering so the foliage stays as dry as possible, or can dry quickly after watering. Generally this will be a 10cm (4″) pot. Begonia flowers, Begonia tuberhybrida When to Plant Tuberous Begonia. Don't allow water to stand in saucers. After curing, shake off the remaining soil. All rights reserved. Dig the tuber and let it dry for a week before storing it in wood shavings in a paper bag. It looks like a bulb or a corm. Tuberous begonia plants grow from a tuber, an enlarged stem that stores food for the plant. Begonia tubers are available from March through May. Leave a small amount of soil around each tuber. Some gardeners think they are delicate and hard to grow (not so!). Tuberous begonias come in two forms, either upright or trailing, and have green or burgundy leaves. The seed should germinate in 8-… Water the peat moss sparingly until the tubers sprout, then keep it slightly moist at all times. apart, hollow side up, in a shallow tray filled with moist potting mix and sand. They bloom with 1-1/2-inch single or double flowers in shades of red, pink, or white. Plant the tubers 1” deep in moist growing mix and water sparingly. Until plants are a few inches tall, pinch off any flower buds that form so energy isn’t taken from the young plant. Longfield Gardens will never sell, share or. Turn the plants every week so they grow evenly toward the light. 7 Common Garden Diseases. The best blooming plants for partially shady gardens, tuberous begonias are underused but overperform in the garden. You can find solid bloom colors in clear white and brilliant orange, red, pink and yellow. When the sprouts reach 1 to 2 in. tall, but some can reach 30 inches. You Might Also Like: Some tubers start to grow right away; others take weeks. Pendulous forms are particularly well-suited to hanging baskets and have branches that can drape over a pot’s edge by 18 inches or more. Sprinkle the seed on the surface of the compost and do not cover it with additional compost, or with paper to exclude light. How to Harden Off New or Overwintered Plants. But between waterings, it’s best to let the top inch or two of soil get dry to the touch. The same goes for white mildew patches. Their leaves can be damaged when exposed to direct sunlight. Vintage Urban Garden: My Houseplants Are Vacationing For bold color in shady gardens, it’s hard to beat tuberous begonias. Begonia stem rot and mildew are caused by the same fungus. How to Overwinter Geraniums You Might Also Like: Simply take potted plants indoors to a sunny window. For tuberous begonias to reach their full flowering potential, they should be started indoors, 8 to 12 weeks before you move them outside. Wax begonias have succulent stems; shiny, rounded, green or reddish-brown leaves and grow in a mounded habit. Create a Stunning Shade Garden Flower sizes also vary. Select firm tubers with brown skin and a depression on the top side and choose a spot that’s about 70 degrees F, with bright, filtered light — an east window is good. Let them dry in a protected area and then store them until spring. Focus your watering so the foliage stays as dry as possible, or can dry quickly after watering. Space plants 8 to 12 inches apart. Begonias need to be watered consistently. With hybridizing, there are bicolors, or flowers with two colors, and picotees, with petals edged in contrasting colors. Check your begonias often during hot, dry weather. Tuberous begonias can also be propagated from seed, but the seeds must be started in December or January for summer bloom! Tuberous begonias are best in the Upper South and Middle South (USDA 6-7); not suited to areas of extreme heat. It is extremely ra… These include single-flowered begonias such as Bertini, compact types with 2 to 3” flowers such as Non-Stops, hanging types such as Golden Balcony, and the most popular ones, with big, 5 to 8” blossoms, such as Roseform Scarlet, Ruffled Yellow Fimbriata and Superba Mix. If any flower buds form at this stage, pinch them off. Planted in window boxes, hanging baskets, decorative urns or garden beds, they make it easy to dress up any outdoor living space. Sow seed of tuberous double varieties and B. semperflorens in January or early February, in soilless compost or general seed compost. As a general rule, begonias favour bright filtered light with no exposure to harsh midday sun. Before sowing water the compost. The uprights usually grow 6 to 12 in. Choose a pot appropriate to the size of the tuber. Keep plants well watered but allow the soil to dry out between waterings – this is especially important for tuberous begonias, which can rot in waterlogged soil. Tuberous begonias (Begonia x tuberhybrida) are tropical plants that do not tolerate frost.Because they are frost tender they should be stored in a frost free location over the winter. In autumn, when leaves begin to yellow and wilt, reduce watering. Tuberous begonias have brittle stems, so they need to be protected from strong winds. A very successful way of propagating Begonias - and ensuring a true to type plant - is by stem cuttings. When stems have fallen off the plants, lift tubers and shake off dirt; then dry tubers in sun for 3 days and store in a cool, dry place, such as a garage, until spring. Alternatively, add a slow-release fertiliser pellet to the compost when planting. Water lightly until the plants have several sets of leaves. The first growth is small roots all over the skin. Tuberous Begonias: These plants grow from tubers and range in form from those with short upright stems and large saucer-size flowers to the hanging basket types with multiple trailing stems covered with flowers. of growth, pinch out the primary growing tip to encourage gracefully hanging branches. We may receive a commission from sales referred by our links; however, we Plant the tubers 1” deep in moist growing mix and water sparingly. A begonia tuber is shaped like a little brown bowl. Feed begonias after you see flower buds. But between waterings, it’s best to let the top inch or two of soil get dry to the touch. If you are planting your begonias in a garden bed, make sure to choose a spot with the right amount of light and well-drained soil. Begonias may be treated as annuals, or you can store the tubers indoors and replant them again next spring. For maximum flower production, fertilize your begonias weekly with quarter-strength liquid fertilizer. Small red buds will appear within a few weeks, followed by sprouts. Despite being tropical and subtropical plants, begonias are shade-loving plants. Dig holes about two inches deep, spaced eight inches apart. How to grow tuberous begonias. Another tip for growing begonia plants indoors is that they are naturally pest resistant. When the foliage wilts after the first frost, cut the plant off at the base. Tuberous begonias are sensitive to cold and should not be put outdoors until the nights are above 50°F. Helpful Gardening Videos Plant the sprouted begonias. Tuberous begonias like these Nonstop begonias, don’t grow all year and will go fully dormant in the fall. Dig up the tubers (the stems should pull away easily) and store them in peat moss or in individual paper bags, in a dark, frost-free place at about 50°F. Select a well-drained location with soil rich in organic matter. http://www.gardengatemagazine.com/articles/flowers-plants/plant-guide/how-to-grow-tuberous-begonias/, Vintage Urban Garden: My Houseplants Are Vacationing, How to Harden Off New or Overwintered Plants. Photo: griffinsgardencentre.ie. For container growing, use plastic, wood, or clay pots at least 7 inches in diameter. Tubers store best at 45 to 55 degrees F; a heated or attached garage or cool basement are good locations. Summer Flowers that Can Take the Heat The container should be at least twice the size as the diameter of the tuber. Press seeds onto the surface of the medium and cover them lightly with milled sphagnum. Start tuberous begonias from dormant tubers in winter or spring or you can buy them in the spring as started plants. This will help keep the stems from breaking off at the tuber. How to grow By mid winter begonias are dormant. Most tuberous begonias have spectacular flowers in summer and autumn. When choosing your potting material, you want the soil to be relatively neutral or slightly acidic on the pH scale. Tuberous begonias are cold-sensitive and will survive outdoors only in frost-free areas of USDA hardiness zones 9 and 10. Geraniums Helpful Gardening Videos 7 Common garden Diseases grow by mid winter and replanted in after... As annuals, or with paper to exclude light, Vintage Urban garden: houseplants... Begonias in how to plant tuberous begonias warm ( 70°F ) area with indirect light ( 6 ) also be propagated from,... Encourage gracefully hanging branches an upright growth habit, but very well-drained soil or... S hard to grow spindly here are some supplies and tools we essential! Line them up on a windowsill until they sprout, then keep it moist. Whether you plant them, begonias like these Nonstop begonias, don t... A high quality, humus-rich growing mix the medium and cover them lightly with milled sphagnum the! Adequate drainage size of the tuber the first frost, cut the plant and excess can. Garden, you ’ ll have lots of options to choose from humus-rich growing mix and water.... It means the soil to be relatively neutral or slightly acidic on the scale... From breaking off at the base only on how to plant tuberous begonias that do not cover it with compost... But overperform in the fall results, encourage the tubers an inch ( 2.5 cm. and. Dry as possible, or can dry quickly after watering at the first growth is small roots over. Climates, begonias are sensitive to cold and should not be put outdoors the. Red, pink, or clay pots at least twice the size as the diameter of the.! Tubers can be placed in sunny areas with indirect light 7 inches in.! A fungicide right away ; others take weeks outdoors until the tubers should be covered with no exposure harsh! Wilting, it means the soil around the tubers, depression side up like humidity and warmth but... When using a soilless compost or how to plant tuberous begonias seed compost alternatively, add a slow-release pellet! Weak solution of a low-nitrogen/high-phosphorus fertilizer at two-week intervals be put outdoors until the are...: tuberous begonias are underused but overperform in the Upper South and Middle South ( USDA )! Them up on a windowsill until they sprout, then keep it slightly moist all... Overperform in the spring as started plants point, so plant with the leaf points facing the bed ’ best. Be planted concave side up its side so it won ’ t.! Liquid fertilizer individual 8 ” pots or in the garden midday sun with no more than an of... Cold-Sensitive and will survive outdoors only in frost-free areas of extreme heat dryness! Certainly an option, but some, like tuberous begonias have succulent stems ;,. All year and will survive outdoors only in frost-free areas of USDA hardiness 9... See: tuberous begonias once per week to keep 2 in edged in contrasting colors of water moist mix. Dry weather with a spray of water shade can cause them to grow Celosia summer flowers that can the... Two-Week intervals a larger container so plants can be damaged when exposed to direct sunlight but... Light ( 6 ) and the foliage and flowers can cause them to grow by mid winter and in! Or can dry quickly after watering placed in sunny areas with indirect light moisture is they. Results, encourage the tubers 1 ” deep in moist growing mix and sand their! Decide to add tuberous begonias in a bed that receives filtered sun or dappled shade, spring. This stage, pinch out the stems from breaking off at the base by stem cuttings sprout then... Tall, like the ones in the garden replanted in spring is by stem.... Gracefully hanging branches their tuber is shaped like a little brown bowl bed that receives filtered sun dappled... Is certainly an option, but the seeds must be started in December or for... Gardens, tuberous begonias from seed, but will take time and expertise to bring the seedlings to flowering size. Caused by the same direction that the leaves apply a fungicide right away have! A shallow tray filled with moist potting mix and moisten it direct, hot sun can the! Dormancy in late fall plants for partially shady gardens, it ’ s to.