Several insect pests attack bougainvillea leaves, which results in leaf curling and wilting. Water the bougainvillea soil when it feels dry. Bougainvillea grow well in pots and can be planted in the ground in warm climates, but the vine is not at all cold-hardy and will die when confronted with temperatures near freezing. © Copyright 2020 Hearst Communications, Inc. If the plants begin to wilt severely, developing curled, yellow leaves, its past time to water. Check the moisture level by tipping the pot and feeling the drip holes on the bottom. If the soil feels wet, allow another couple of days to go by before watering. Bougainvilleas are not frost-tolerant, growing only in U.S. Department of Agriculture plant hardiness zones 9 through 11. Between this cycle, new leaves/stems grow. Too much watering can cause wilt, as can too little. Fertilise the plant after a month. Leaves turning purple or red indicate a phosphorous deficiency. Within a few days it will have perked up when (if) temperatures cool. To dislodge aphid colonies, spray the bougainvillea with a direct stream of water. Water until the pot leaks moisture and then allow to dry out until the next watering. Bonnie Grant began writing professionally in 1990. Michelle Wishhart is a writer based in Portland, Ore. She has been writing professionally since 2005, starting with her position as a staff arts writer for City on a Hill Press, an alternative weekly newspaper in Santa Cruz, Calif. An avid gardener, Wishhart worked as a Wholesale Nursery Grower at Encinal Nursery for two years. Cool temperatures (below 0-1.111 degrees Celsius) will cause the plant to wilt. Bougainvilleas are generally not susceptible to serious diseases. See how my Bougainvillea glabra looks in the middle of winter: Symptoms: The smaller, unhatched scale insects can be observed on the underside of some leaves, covered in a waxy coating. Therefore the best time to trim it is when there's no danger of frost, and before the new growth gets established. Remove the plant from the original pot. Expect some wilting due to transplant shock. Check for signs of fungal disease, which is also common to the plant. Bougainvilleas prefer bright, sunny conditions. Scale insects or mealybugs are plant parasites, commonly found in household gardens. Pot the plant in a container that just contains the root ball. The bougainvillea looper (Disclisioprocta stellata) is a nocturnal caterpillar with a green or brown body. Bougainvilleas are drought-tolerant plants that will not be harmed if they wilt slightly, advises Green Thumb Nursery of Ponchatoula, Louisiana. Now that the sun has come out and the foliage hasn’t hardened off it has wilted. American Phytopathological Society: First Report of Fusarium Wilt in Paper Flower, Louisiana State University Agriculture Center: Bougainvillea. Too much fertiliser causes the plant to wilt but too little will cause the plant to slow its growth and stop producing flowers. Step 3 Bougainvillea bloom on new growth so cutting it back will encourage more blooms the following season. Bougainvillea should be moved indoors when the temperatures drop. It didn't start to bloom until a few weeks ago. Inspect the bougainvillea plant regularly for signs of insect infestation, such as webs, small spots, nibbled or eaten areas, or disintegrating leaf tips. Hello, I'm in Dallas, zone 8A, and have a large potted bougainvillea that sits out on our pool deck. Do not put the pot on a saucer, as this keeps the roots too wet. Bougainvillaeas originally came from Brazil so it's a semi-tropical plant. Around a lot of the country the weather has been wet and hot, with humidity reaching 98% in some regions. Pale green leaves indicate nitrogen deficiency. It has to get used to the new environment. Why Are My Cucumber Plants a Light Green Instead of a Healthy Dark Green? The soil should be well draining, as compacted soils make it difficult for the plant to access nutrients. Fill the new pot halfway with the planting mix you made. It sounds like the latter was the cause, and it's now recovered with leaves and flowers. Before that time, the leaves were just fine. Cool temperatures (below 0-1.111 degrees Celsius) will cause the plant to wilt… She has been published on various websites, specializing in garden-related instructional articles. Fertilize in early spring and again in midsummer. My bougainvillea seems to be wilting (not drying) and turning black. Put your bougainvillea into the pot and fill the rest of the way with your planting mix. Mealybugs are attracted to bougainvilleas. Keep the bougainvillea in full sun. Mulching before winter can help keep the plant warm. In our climate, though not at all extreme, Bougainvillea is semi-deciduous. In alkaline soils, bougainvillea may develop chlorosis, an unattractive yellowing of the leaves in which the veins remain green. Check the moisture level by tipping the pot and feeling the drip holes on the bottom. Moisten the soil evenly when watering, and allow the soil to dry out slightly between waterings. Prune off most of the side branches and vines to restrict growth back to the main stem. It manifests as small reddish spots on young leaves, which grow larger and develop into large tan blotches with a reddish rim. 14 years ago. One of the causes for the leaves turning yellow (and yes, they turn completely yellow) is those cooler winter temperatures. Do not fertilise sooner, as the roots will not have had time to establish, and the plant will be tender and can burn. Wilting leaves are usually a sign of water stress, but they can also indicate a disease or problem with the roots. They weren't falling off and the plant never wilted. Beware of caterpillars, aphids, scales and greenflies, which all thrive on bougainvilleas. To improve soil and promote healthier growth, fertilize with 1/2 to 1 pound of a general-purpose 10-10-10 fertilizer. Fertilise monthly with balanced fertiliser (such as 5-5-5), that provides a slow release of nutrients. Prune after flowering to avoid clipping off flower buds, and pinch back new growth to promote a full, bushy habit. Disturb the roots as little as possible. I have been pruning it to keep the shape and has been very healthy until a week ago, when the tips started wilting and turning black. This bougainvillea has been here since the last 1.5 years and has done well in growing quickly (too quickly), but has bloomed sparsely at the tips. Follow the manufacturer's instructions for the proper amount to apply and lightly dig the granules into the soil around the base of the plant. The problem you’re currently experiencing is due to reintroduction into the strong sunlight. Clemson Cooperative Extension: Bougainvillea, Green Thumb Nursery: Bougainvillea Growing Guide, University of California Statewide Integrated Pest Management Program: Aphids, Missouri Botanical Garden: Bougainvillea (Group), University of Connecticut: Fertilization of Trees, Shrubs, Vines and Groundcovers, The Minimum Temperature for Bougainvillea.
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