(I will discuss this in more detail below. The next plant of economic value to be studied was the avocado resulting in “the avocado belt” where avocados flourish and bear good crops on the sides of air-drained hills. For example, a frequent garden scenario, in Mediterranean climates is that plants do fine in the rains of winter, then dry weather hits, and the plant has insufficient nitrogen to keep growing so the leaves go yellow from lack of nitrogen and fall off from drought. The good news is that you can easily stop the spread of the yellowing to the plant’s other leaves. I hope you will love it as much as I do. Thanks for any suggestions. There is another honeysuckle, however, that is a tropical type, the giant Burmese honeysuckle (Lonicera hildebrandiana). Now to complicate matters, along comes global warming which in turn causes climate change. With any plant, including honeysuckle, leaf drop after massive bloom might occur it it’s growing in soil with ample quantities of phosphorus and potassium and insufficient nitrogen. Plant in full sun; it likes a hot spot. Thank you for asking me such an interesting question, which gives me much to think about. Subsequently virtually all other economic plants for agricultural and horticultural use were studied, categorized and listed in the Sunset Western Garden Book, an encyclopedia of plants published by Lane Publishing. Leaves Yellowed and Curled - Aphids Honeysuckle aphids are not much bigger than the head of a pin, and have spindly legs and soft, pear-shaped bodies which may be green, brown, black, or pink. © Copyright 2020 Hearst Communications, Inc. Leaf blight of honeysuckle plants most often occurs in wet weather, but if your plant is healthy, it is not usually a serious problem. Vita Sackville-West wrote that if a plant is a failure for whatever reason, we should always “Yank it out!” and replace with something better. They feed on vines in the spring, when the tender new growth emerges. BUT please water and feed enough at first to get it going. Another factor that might cause leaves to yellow and fall off is that you have had so much rain. Could it be that the reason your honeysuckle is losing its leaves in summer but continuing to flower is that such swings of temperature occurred last spring and are making the plant lose its leaves in summer? Or the same thing might be happening in a pot, if that’s how you’re growing it. Keep it well-fed, well-watered, and well-mulched. The leaves often go bright yellow and fall off year round. Dropmore Scarlet honeysuckle (Lonicera brownii, USDA zones 4 to 7) attracts hummingbirds to the red flowers on its 12- to 20-foot vines. Then suddenly without warning all the leaves fell off but the tree still had loads of flowers and even many little fruits—more than usual my neighbor said. I want to upgrade the containers which are currently plastic buckets. Toggle navigation. A thin white layer of basidia, or spore-producing structures, also appears on the lower leaf surface. I'm fairly new to Arizona and the complexities of watering during the heat. After reading all these possibilities I suggest you first read up on honeysuckles to find out which one you have, then dig into the soil where it grows and find out if the soil is too wet or too dry. There are two types of honeysuckle plants: vines and shrubs. I chose it because it was drought tolerant and loved by hummingbirds. Use chemical insecticides only when infestations are severe and affecting plant health. I certainly don’t want it to end up invading open spaces where natives grow. Chicken manure should work well. Honeysuckle plants can tolerate periods of drought, but prolonged dryness can stress your plant, resulting in yellowed leaves and defoliation. I am trying to do it as organically as possible. The Morton Arboretum: Understanding and Identifying Scale Insects on Woody Plants, Royal Horticultural Society: Honeysuckle (Lonicera), University of Minnesota Extension: Honeysuckle Leaf Blight, National Agroforestry Center: Honeysuckle Leaf Blight, The Connecticut Agricultural Experiment Station: Honeysuckle (Lonicera) Plant Health Problems, University of California Extension: Leaf Burn or Scorch, National Gardening Association: Honeysuckle. The solution is to fertilize with ample balance fertilizer and keep the plant well watered so that it can quickly grow leaves to replace those that naturally fall. Thus plants that are stressed are programmed by nature to make seeds. If it doesn’t have enough nitrogen the new leaves will be too small. We have had plenty of sunshine and rain this month. If giant Burmese honeysuckle is flowering and then goes dry, the leaves are likely to turn bright yellow and fall off. So if this is true and you do water elsewhere in the garden, then indeed I would take it out. Additionally, if the ground is too wet or too dry, either of these things can lead to yellow leaves that drop off. She is co-founder of On Fiction Writing, a website for writers. Buy compost… Continue Reading, Gardening Question From Martha: I have access to a commercial mushroom farm that makes its spent mushroom medium available at no charge to gardeners. Divine! Should I remove it? Apply to the ground, cover with mulch, and water it in. In that case, weather extremes can cause leaves to go yellow and drop off. Gardening Question From Molly: Hello! I live in the UK, so things might be different. Prior to this discovery entire crops worth millions of dollars were destroyed by extremes of temperature and occasionally the trees themselves even were killed. I told the gardener to bring the hose and pour water onto the roots. Could it be that some of this heritage remains in the past genetics of your vine? it looks horrid. Infestations of scale insects are difficult to detect, but one of the first noticeable signs is the yellowing of your honeysuckle plants' leaves. Over time, leaves can become completely brown in color and wither when the leaf scorch is a severe enough case.