Prune it back by up to 50% if you prefer a compact plant, or less if you want a bigger one. Examine the petals, leaves and stems carefully for signs of infestation. Not only do they transmit deadly plant viruses as they suck the plant with their mouth parts, but they stunt the plant's growth, damaging the leaves and buds. The edges of the bougainvillea leaves will look chewed on and have a scalloped edge. In addition to warmth, bougainvillea requires a bright, sunny growing location. Use a general purpose plant food 20-10-20, following label directions. If the plant's leaves are pale, or it starts to lose leaves, it might need more sunlight. once a week. They require little care and small amounts of water. Bougainvillea flower drop can be caused by temperatures that are lower than those the plant is used to. What to Do for a Fuchsia Plant That Is Losing Leaves. Bougainvilleas require warm weather. When bougainvillea blooms are falling off your plant, check your irrigation. You may be applying the correct amount of water to the plants but without proper drainage in the soil or pot, the water may stagnate, causing the bougainvillea to retain too much moisture. Their colour might be green, brown or black, and sometimes they have wings. Plant your foliage in soil that drains well -- add pine bark in pots and planters to assist the drainage. When the weather gets cooler and winter rolls around, leaf drop is only natural because of the reduced amounts of sunlight and lower temperatures. One of the primary causes that flowers drop off bougainvillea is low light levels. One of the primary causes that flowers drop off bougainvillea is low light levels. Bougainvillea is a tropical plant that can bloom year-round in areas of the world where night and day are nearly the same length. © Copyright 2020 Hearst Communications, Inc. The most common reason for leaf loss in bougainvillea plants is over watering. Insect sightings and movement may be indications that your plant's growth and health is in jeopardy. Although bougainvilleas tolerate brief dry periods, the vine requires regular water in order to bloom since it goes through water quickly. The leaves in turn fall off, and the plant may die. In fact, if these plants receive too much shade or are blocked from the sun, it may result in leaf drop. They should be allowed to dry between watering and never be completely soaked. The recommended water range for a bougainvillea is dry to normal. Because of this preference, it blooms best in fall and spring in areas of North America and Europe but cannot thrive in freezing temperatures. Bougainvillea plants are delightful showpieces that boast small white flowers surrounded by brilliantly colored bracts. Look for small, spider-like insects if the bougainvillea leaves turn yellow and drop from the plant. See how my Bougainvillea glabra looks in … What is causing my bougainvillea leaves to turning yellow & fall off? Another possible cause of bougainvillea flower drop is exposure to ethylene, a gas produced by ripe fruits and barbecue pits. Like every other plant, bougainvillea has particular growing needs that must be met if it is to bloom and grow happily. Bougainvillea and Loss of Leaves Even in Summer. Bouganvillea dropped all its leaves I kept my bougainvillea outdoors for the summer and brought it in before the temperatures dropped. Bougainvillea are some of the few plants that can handle drought and large amounts of sunlight. Chlorine from pools is also a potential problem. Try to meet or beat the light levels of the garden store where you purchased the plant. One of the causes for the leaves turning yellow (and yes, they turn completely yellow) is those cooler winter temperatures. Not all the leaves fall off but maybe 1/2 of them. Mississauga, ON.