hibiscus plant diseases pictures


If you have any questions, comment below. On any hot day, make sure that you keep your plants watered enough if you keep your plants outdoors. Weak plants succumb more easily.

We discuss scale in the pest section of this article. If you let your potting mix dry out completely, the lower leaves will often turn yellow. If severe, leaves may fall off, but this disease doesnt cause severe damage. University of Kentucky Department of Entomology, How to Get Rid of Insect Pests on a Hibiscus Plant. whiteflies On the other hand, healthy roots are firm and white. Please do me a favor and share this post to social media because it will help me spread the Ohio Tropics houseplant care tips to the masses! Spider mites exert piercing-sucking mouthparts to feed on the sap on the underside of leaves and needles, producing tiny white or yellow spots and giving leaves and needles a stippled or mottled appearance. All rights reserved. I will first go over some common problems with hibiscus, but then keep reading to the end where I also go over general care tips on how to keep your plant growing well and thriving.

Hibiscus spp. plant helps create a lush, tropical ambiance in your own backyard. The larva then pupate in the soil, emerging as adults to being the cycle again. Their children females all are on the move shortly after hatching until they find a place to settle, grow a protective cover, and start laying eggs. If there are streaks, cut back a little further until you see clear wood. Heres what you can do: Keeping a good eye on your hibiscus scouting can help you spot insect problems before they become severe and damage your plant. I often see them eating right through new flower buds, well before they open, and they will also attack fully opened flowers as well. If I notice them on my hibiscus flowers, Ill either pick them off and throw them on the ground and step on them, or flick them into a cup of soapy water. If you grow hibiscus in well-draining soil, you are well on your way to preventing root rot. Some of the links in this post may be affiliate links. My hibiscus has white fungus, what should I do? See also: 5 Of The Best Companion Plants For Your Olive Trees To Know Abou, Hibiscus (genusHibiscus) is a genus of numerous herbs, shrubs, and trees in the mallow family (Malvaceae), generally divided into four groups: hardy hibiscus, Rose of Sharon, tropical hibiscus, and all the various species of hibiscus.. Thrips can also cause flower buds to fall off before they open. Depending on the species, hibiscus grows in U.S. Department of Agriculture plant hardiness zones 4 through 11, producing large, stunning blooms in a range of colors. Keep your plants healthy so they can better fend off any fungal disease. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. It will also result in discolored shoots and leaves that wilt and drop off the stems. Never let your plant sit in water and stay sopping wet for extended periods. Do you grow hibiscus? White powdery mildew on hibiscus is a common problem that usually wont kill the plant, but the powdery substance can definitely detract from its lush appearance. During hot and dry weather, regular watering is a must, and if you grow hibiscus outdoors in pots like I do, they will usually require watering daily so be sure to provide them with enough water. Hibiscus growers do everything they can to be sure the plant you take home is healthy and pest free, but problems can sometimes arise. Hibiscus plants thrive in areas with full sun and regular amounts of water. Copyright 2022 | BustlingNest.com, All rights reserved. Some wilts are caused by pathogens in the soil, and others are caused by water stress or cold shock. The most common reason for a wilting hibiscus is soil that has gone too dry. plantsheaven.com, Phytophthora rot is a soilborne water mold that can quickly spread from an infested field to a new area through the movement of water in the soil or on the surface, according to the Pennsylvania State University Extension., New infections can appear when the temperatures exceed 59F (15C). Be sure to deadhead the flowers daily to keep the plant tidier since spent flowers can quickly make a mess. (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)})(window,document,'script','//www.google-analytics.com/analytics.js','ga');ga('create', 'UA-46953310-1', 'auto');ga('require', 'displayfeatures');ga('send', 'pageview'); Prune out old wood. They generally have funnel-shaped blossoms which bloom in a variety of colors including white, yellow, red, or pink. Unfortunately, the plant is prone to hibiscus diseases such as leaf spots and fungal diseases, advises Fine Gardening. I'd need more details to help. If you are growing your plants outdoors in pots like I do, when it gets too cold, you can move them indoors if you are planning on saving your plant over the winter time. Small black or brown spots on the underside of leaves or stems could be scale insects. are grown as annuals, perennials, and evergreen and deciduous shrubs or trees. Without fail, for me, they start to appear around the beginning of July and persist for about a month. Hibiscus are heavy feeders. If a hibiscus has white fungus, its important to tackle the problem as soon as possible; once the problem is established, it becomes more difficult to control. leaves yellow turning plants hibiscus reasons roses yellowing beesandroses There are a number of pests can you affect hibiscus, but the one that typically affects mine outdoors are Japanese beetles. Insect pests on hibiscus can be controlled with insecticidal soap, or a hard spray from the garden hose can dislodge them. It is best to try and maintain a fairy moist potting mix for your plant and avoid extremes in soil moisture. If left unchecked, aphid colonies can explode and cause significant damage. I am so disappointed. Hibiscus plants wilt for different reasons. Did you know that grubs in your grass actually grow up to be Japanese beetles? Diseases and pests can significantly affect your hibiscus plant's health. In very hot climates, a little afternoon shade is appreciated. Powdery mildew is a white velvety coating on the leaves; mealybugs are a white cottony mass nestled into buds, leaf axils, and on stems (more on mealybugs later in this article). A dehydrated hibiscus can die pretty quickly if you leave it dry for too long.

There are quite a few reasons why this can happen. Division of Agriculture and Natural Resources The conditions that favor the disease, including time for the disease to establish, Wilts and rots, caused by soil fungi and bacteria; and by improper cultural practices. But, I do my VERY best to make sure the information shared on this blog is both accurate and helpful. Root rot can quickly set in if you allow your plant to sit in excessive moisture. See also: How To Easily And Successfully Remove Aphids From Kale: A Quick Guide5 Hibiscus Plant Diseases To Look Out For! Using insecticidal soap is an effective way to treat common insect pests on hibiscus plants, according to the University of Minnesota Extension.

Improve air circulation, and dont water from overhead. I grow my hibiscus outdoors in warm weather and treat them as annuals. Insecticidal soap can be used, or a systemic insecticide. How To Effectively Use Nematodes To Control Garden Pests! Whitefly adults cannot be sprayed, they just fly away. When your hibiscus flowers are done, be sure to deadhead promptly since the spent blossoms can smother the some of the foliage and encourage pests and diseases. The best defense against rots is to ensure the hibiscus is growing in well-drained soil. The Regents of the University of California. A yellow leaf or two is normal, but if you start to see quite a bit of them, and quickly, its time to evaluate the cause. Provide good drainage. Also, check out my shop on Amazon for all your houseplant care needs:OHIO TROPICS PLANT CARE STOREFRONT, Spider Plant Brown Tips: 8 Most Common Causes w/ Fixes, Peperomia Hope Care Guide: 7 Great Tips for Success.

dipladenia rio container planter containers plants spike flower garden pots pink outdoor plant flowers planters pot deck fernlea gardening star Hibiscus truly despise when their soil goes completely dry, and the entire plant will wilt. Chose resistant varieties. They are completely different plants. An ideal temperatures range is 65-85F. It should dry out on its own, especially if it's hot.

Are you interested in turning your plant around so that it becomes a lush, blooming machine? This also happens when it is going dormant. I transplanted it in another flower bed with compost and fed it plant food but it is wilting I'm dead heading the leaves that are dieing but the plant is still most and serving is there anything else I need to do, I have lost two Luna hibiscus. Do your homework before you buy. Generally, symptoms for Phytophthora rots include root rot, stem and crown rot, stunting, yellowing, and wilting. Twig dieback and buds not opening is also possible with botrytis blight. If it has gone bone dry, go ahead and promptly soak your plant thoroughly. Why does this happen? Sometimes flower buds will fall off well before they open. At home, she maintains her own 400 square feet plot. In general, cool, wet weather early in the growing season encourage the leaf spot fungi, and they are rarely an issue during or after warm, dry weather in the spring. Are you identifying and dealing with the issue appropriately? For more detailed information how getting your hibiscus to flower abundantly, check out my post: How to Get Hibiscus to Bloom. Most gardeners confuse these symptoms with drought stress. Control aphids with insecticidal soap or a systemic insecticide. Consisting of over 200 species, the hibiscus (Hibiscus spp.) I am SO excited you are here! Generally, leaf spot diseases will not seriously harm your plants, but there are things you can do that when done together, can help you prevent leaf spots showing on your hibiscus plant in the following years. UC If you have a hibiscus indoors that youd like to move outdoors, always place it in full-shade first outdoors for several days and then gradually increase the sun exposure. To control powdery mildew, fungicide need to be applied before the plant shows symptoms. The fungus causes stunted growth and in severe cases, the leaves may wither and fall off the plant. We have lots more on the site to show you. They will usually need watering daily in hot, sunny weather. In heavy infestations, foliage withers and dies. I live in Ohio, where I normally grow mine only outdoors in pots, and I give them the sunniest position possible. Watch out for these five hibiscus plant diseases that can be very harmful to your plants. Youll want to be consistent and do this daily if you notice Japanese beetles on your plants. Hi Nancy! Wilt diseases are caused by pathogens in the soil. Proper growing conditions, garden hygiene, and good scouting techniques can help you keep your hibiscuses healthy. While you might kill the pest, you could also kill the predatory insects that would do the job for you or kill beneficial insects like honey bees. Roots will be mushy and brown. No doubt, plant indoors to look beautiful and uplift your home dcor. When you purchase a hibiscus from the garden center, most of the time theyre going to be pretty root bound and will dry out very quickly in the nursery pots that theyre growing in. management, 2017 Regents of the University of California, Division of Agriculture and Natural Resources. When you touch it, it can leave rusty marks on your fingertips. 2017 Pros and cons of Miracle grow You Need To Know About. Leaves are shriveled, but not yellow. Prune out all infected flowers and foliage and destroy it. She is a part time landscape designer who works full time caring for a 28,000 square foot public garden. Height of 4.5 meters (15 feet) rarely exceeds 2 meters (6.5 feet). If you dont do this, it may be too difficult to keep your plant properly hydrated, thus causing a host of different issues. Sticky traps would be effective in small infestations outdoors as well. Leaves will typically appear a mottled yellow and will continually turn more yellow over time. And keep your garden tools clean, too. I would never recommend trimming your hibiscus down that far. Many species bloom year round. 3. Reportedly, double-flowered hibiscus are more prone to buds dropping, but I commonly see it in any variety. Mealybugs are tropical and can appear on your Hibiscus rosa-sinensis after you bring it indoors for the winter. When I purchase them in late Spring, Ill promptly move them into a larger pot (I typically go about 1-2 sizes larger than the container it was previously growing in. Root rot is caused by water stress and occurs when the soil is too wet for too long. Id love to help! How To Easily And Successfully Get Rid Of Golden Rain Tree Bugs: A Complete Guide, How To Easily And Successfully Remove Aphids From Kale: A Quick Guide. Be sure not to miss my blog post that talks about how to deal with Japanese beetles. They only survive the winter outdoors in zones 7 and above. Morning is the best time to water because the leaves will have plenty of time to dry. They live in a colony and often can be observed in rows up and down hibiscus stems and on the flower buds. Generally, leaf spot diseases weaken shrubs and trees by preventing photosynthesis, reducing growth, and increasing your hibiscus plants sensitivity to pests and other diseases. Or use a systemic insecticide that is applied to the soil. Spider mites are not insects, they are arachnids with 2 body parts and 8 legs. There is no growth. Without enough sun, your plant will give you few, if any blooms and no one purchases these as foliage plants! Growing plants indoors is one of the most challenging tasks. If you feel your soil and it is bone dry, promptly soak it. The best cure is to prune out the wilted branch. Dont water from overhead; try to keep the foliage dry. My hibiscus are struggling with excessive heat (they are planted in the ground). at one point it was pot bound and i fixed it but its been weeks and hasnt come back. Given the right conditions, including following this fertilization regiment (along with plenty of sunshine outdoors), my hibiscus plants bloom continually all summer-long! You've only seen one page. Fallen leaves should be removed and destroyed as soon as possible to prevent the fungus from spreading, advises the University of California IPM Online. Spider mites thrive in hot, dry conditions, especially when there are low levels of humidity. Youll want to look on the undersides of the flowers too to find the Japanese beetles. Like leaf spots, botrytis thrives in humid weather, cool, particularly during the spring and fall. If you let your plant get to the point of the foliage wilting, you will often see some flower buds fall off before opening. It can also be a natural part of the aging process as the leaves turn yellow and fall off to make way for fresh new leaves. Follow it back until you find the wound. Here is a snapshot of the main characteristics of hibiscus plants.Genus nameHibiscusPlant familyMalvaceaeSun exposureFull sunPlant typeTrees, shrubs, perennials, and annualsHardiness USDA Zones Hardy perennial hibiscus dies down in cold temperatures, including red hibiscus (Hibiscus coccineus) will grow well in zones 5 to 9. Tropical hibiscus (Hibiscus rosa-Sinensis) is an evergreen blooming essentially year-round and grows in zones 9 and 10.Temperature Ideal is between 65 to 75F The hibiscus plants do not tolerate cold temperatures; they need warm temperatures for flowers to thrive.HeightHeight of 4.5 meters (15 feet) rarely exceeds 2 meters (6.5 feet).Blossoms Main Colors White Yellow Red Pink Lavender BurgundyBlooming Seasons Hibiscus flowers are beautiful; however, they are short-lived, generally in bloom for only one day. Perennial hibiscus blooms in mid to late summer.Soil TypeA rich and well-drained soil mix is perfect for growing hibiscus.Watering Requirements Water your hibiscus plants from the top of the soil down so that water runs out the bottom holes. And ensure you keep the soil moderately moist, not too saturated.FertilizerHibiscus plants are heavy feeders and need a balanced fertilizer, including 10-10-10 or 20-20-20.Maintenance requirementsOverwatering or overfertilizing can increase the possibility of many hibiscus plant diseases.PropagationVegetative cuttings or seeds5 Hibiscus Plant Diseases To Look Out For! You can also grow them in containers, houseplants, raised beds, landscapes, and hanging baskets. Be sure to also remove the base of the flower itself when you deadhead so that you dont have seed pods developing and taking energy away from your plant. While you might kill the harmful pest, you could also kill benefits insects such as honey bees and other beneficial bugs.. However, plants with low levels of infection may not have noticeable symptoms. Botrytis (Botrytis cinerea), commonly called blight, affects hibiscuses buds, causing them to turn brown and ultimately drop off before they even open. Sign up to get all the latest gardening tips! Yellowing leaves can be caused by too much or too little water, too much or too little sunlight, too hot or too cold temperatures, spider mites, or poor nutrition. Unfortunately, we cannot provide individual solutions to specific pest problems. But they failed to give me any growth. If you own a hibiscus with powdery mildew, all is not lost. I just dont know what I did wrong.-Nancy. A systemic insecticide will work better than a spray. Dont confuse powdery mildew with mealybugs. If necessary, you can control insect pests on hibiscus with insecticidal soap or insecticides designated for use on hibiscus. Hibiscus plants do best in areas with full sun and regular amounts of water. Fertilizing is a MUST in order to have a healthy, blooming plant. Pruning the diseased branches and providing the hibiscus with good airflow helps control both bacterial and botrytis blight. Adults lay eggs in flower buds and the larvae feed on the bud. And once you notice any signs of the hibiscus plant disease, first ensure it is the right disease and apply the recommended treatment for a healthier, stronger, and beautiful hibiscus plant and garden. You can use a variety of different potting mixes, but what I usually do is mix about 3 parts of Miracle Gro potting mix with 1 part of perlite to fluff things up a bit and improve drainage. Next time, if you need to trim your plant, I'd recommend not taking off more than 1/3 or so of the plant. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Thanks for the advice I has a purple herbiscus I had to move it due to garden works at the start of summer. If you chose to use a pesticide, be sure to use a miticide, not an insecticide. 1.

Bacterial leaf spot Pseudomonas cichorii develops in wet and rainy weather and is spread by splashing water. There is much less light indoors and the plant can not support all of the foliage that it developed while it was growing outdoors. Control thrips by removing all infected flower buds and raking up the fallen ones. Use a balanced fertilizer (such as a 14-14-14 fertilizer) weekly. If botrytis is a continuing problem, a fungicide can be used as a preventative. Rake up all fallen leaves, and prune out and destroy badly infected branches. Check out this post which is one of the most popular of all time. Powdery mildew begins as white spots that turn gray or tan as the fungus grows and covers more of the foliage. Ohio Tropics (Raffaele Di Lallo) is a participant in the Amazon.com Services LLC program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. A spray cannot reach inside the bud to where the thrips live. ins.style.display='block';ins.style.minWidth=container.attributes.ezaw.value+'px';ins.style.width='100%';ins.style.height=container.attributes.ezah.value+'px';container.appendChild(ins);(adsbygoogle=window.adsbygoogle||[]).push({});window.ezoSTPixelAdd(slotId,'stat_source_id',44);window.ezoSTPixelAdd(slotId,'adsensetype',1);var lo=new MutationObserver(window.ezaslEvent);lo.observe(document.getElementById(slotId+'-asloaded'),{attributes:true}); Here is the first report of botrytis blight, caused by botrytis cinerea, on hibiscus in South Africa., The fungus can attack and damage almost any plant part but prefers tender tissues, including petals and buds, or weakened or injured tissues such as wounds and aging or dying plant tissue., Keeping your growing area clean is the way to prevent botrytis because botrytis can form multiple spores in a very short time under favorable conditions., Almost all nut trees and fruit and most ornamental trees and shrubs, including hibiscus plants, can develop Phytophthora rot (or root rots) if the soil around the base of the hibiscus plant remains wet for more extended periods or when planted too deeply.. However, some growers are scared of this plant because of its fragile Hello friends, I am Altin. A variety of fungal pathogens causes the majority of the leaf spots, but bacteria cause some. Resting spores that can survive for several years in the soil or plant are formed throughout cold and dry periods., When favorable temperature and moisture conditions are present, these resting spores will grow and form another type of spore-producing structure called sporangia. Like any plant problem, there are several different causes: This is likely a symptom of chlorosis, and a classic sign would be where the leaf veins remain green, but the rest of the leaf turns yellow. These diseases enter the plant through the roots and prevent the plant from moving nutrients and water through its system. Even with minimum care, hibiscus plants offer great rewards throughout the year, including adding color to your garden.. Top 5 Best Soil For Indoor Grow And Thriving Plants. This is the way nature designed these plants so it is nothing that you are doing wrong. Plants Heaven is a blog that shares information about preparing, creating, and maintaining gardens in and out of your home, regardless of where you live.

Aphids are small, soft-bodied insects that suck juices from plant parts, creating a mottled appearance on the leaves. Be sure to plant in an area with good soil drainage. Additionally, avoid overwatering and reduce wet foliage by forgoing overhead watering and instead watering at the hibiscus base. Cleaning up fallen infested leaves can help keep the disease from spreading. Because thrips are so hard to see, bud drop is the number one indicator that your plant has thrips. hi! This is just the nature of the flowers. If you chose to use a fungicide, follow the label directions carefully and be sure you are applying it at the right time. For noncommercial purposes only, any Web site may link directly to this page. Looks closely to find the characteristic fine webbing of the spider mites (including on the underside of leaves). African violets (also known as Saintpauliaspecies) are one of the delightful blooming plants you can plant indoors. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance. In severe infestations, leaves fall off the branches and drop to the ground. Tropical hibiscus love it WARM and typically do best in the 65-85F temperature range. Be sure to disinfect your pruning shears to prevent spreading blight or any other disease to other plants in your garden. In addition to this application, I will also water my plants with Fish Emulsion & Kelp every 1-2 weeks. Pruning will not cause them more stress, but if your plants are not getting enough water during the heat, I would make hydration the primary concern. 5 Of The Best Companion Plants For Your Lantana Plants To Know About! This works to prevent new diseases.

Water your hibiscus at the base of the plants and not on the leaves. my hibiscus trunk is completely blacked when i checked to see if it was alive. Just be careful when you do increase light for your plant so that youre not burning the foliage. Cold, drafty windows indoors, or when temperatures start to get cold outside if youre growing them outdoors, can cause this. I am SO excited you are here! High humidity and reduced air flow create the environment for botrytis to develop. Scale are another insect that suck the juices out of plants and large infestations can cause severe damage. Extremes in soil moisture (too dry or too wet) is a common cause of yellow leaves. Spider mites can be removed with a strong blast of water from your garden hose. I am the guy behind Plantsheaven.com. No treatment or cure is available for hibiscuses infected with viruses, states the University of California IPM Online. See also: Can Tomatoes Really Grow In Indirect Sunlight: Heres The Truth!5 Hibiscus Plant Diseases To Look Out For! All rights reserved. This develops when days are warm and nights are cool in late summer and early autumn. In colder areas, whiteflies are a problem in greenhouses, but can occur when you bring your tropical hibiscus indoors for the winter.

The fungus in the spots may produce even more spores, causing secondary infections on other leaves. Dont compost it, as botrytis can live in the compost. This is caused by a fungus or bacteria entering a stem through a wound. ins.dataset.adChannel=cid;if(ffid==2){ins.dataset.fullWidthResponsive='true';} Generally, a single beetle does not eat much; however, the presence of many beetles causes severe damage. Spots on leaves can be caused by bacterial or fungal diseases, and by scale insects. Learn. Be sure hibiscus plants arent crowded since fungal diseases thrive in warm, humid conditions with poor air circulation. Heres what bugs hibiscus and the symptoms to look for. Then, using clean clippers, cut the branch a few nodes below the wound. It has minimum maintenance requirements and will add color to your garden or landscape and turn it into a beautiful space. As with other fungal diseases, watering the soil and not the foliage helps reduce the moist conditions that powdery mildew likes. A rich and well-drained soil mix is perfect for growing hibiscus., Hibiscus plants are heavy feeders and need a. When they contact susceptible tissue, they germinate and penetrate the roots, form mycelium, and cause infection.. Thrips are very tiny insects with a very narrow body. Hibiscus are also heavy feeders and you must be sure that youre fertilizing enough. Contact webmaster. Spider mites suck juices out of the leaves, creating a mottled appearance. As the fungus grows, the spots increase. Even temperatures in the 40-50F range will cause your plant to start shutting down and suffer. Both sunlight AND fertilizing are vital for a blooming hibiscus. Fungicides work to prevent a fungus, they dont cure it. Purslane Weed: Identification and Control, Crown Gall Disease: Agrobacterium tumefaciens, Pink Hibiscus Plant Grow and Care Guide. Spider mites can also cause yellow leaves. Good cultural and sanitation practices will help prevent a lot of diseases by keeping plants healthy. Be sure that water drains away from the soil that your plant is situated in and that potted plants do not have standing water in the saucers. How to Care for a Perennial Hibiscus Tree Year Round, University of California IPM Online: Leaf Spot Diseases, University of California IPM Online: Bacterial BlightPseudomonas Syringae, University of California IPM Online: Botrytis BlightBotrytis Cinerea, University of California IPM Online: Armillaria Root Rot (Oak Root Fungus)Armillaria Mellea, University of California IPM Online: Viruses, University of Florida IFAS Extension: Disinfecting Your Garden Tools, How to grow your own herb garden in any indoor or outdoor space. Leaves will be distorted, yellowed, and curled. I added kemp and emulsified fish to soil. Most leaf spot fungi have the same life cycle. Scale on hibiscus and other plants too look like small black or brown raised dots. Ladybugs and lacewings eat aphids you can even purchase these beneficial insects by mail and release them into your garden. Temperatures that are too cold or too hot can result in yellow leaves. Then look for insects (more on that below) that could be causing the problem. They are very, very tiny and almost impossible to see with the naked eye, so look for fine webbing in branch crotches and leaf axils. Alaine has been working way too hard in horticulture since 1992, beautifying golf courses, resorts, and hotels. You may stress it further if you try anything else right now. plantsheaven.com, Be careful if you decide to use a chemical pesticide. If you live in any areas that have very strong sun, in addition to very hot conditions, you may want to give them only a half day of sun outdoors. Hollyhock rust is a fungal disease that can develop on hibiscus and is identified by yellow or orange raised dots (pustules) on the leaves underside and rusty colored spots on the tops. When one branch wilts and the rest of the plant is healthy, it is most likely dieback disease. Plant breeders are continually working to develop plants that can resist diseases. You can prevent losses to Phytophthora by providing your hibiscus plant with good soil drainage since, generally, Phytophthora requires warm, moist soils to cause disease., See also: Pros and cons of Miracle grow You Need To Know About5 Hibiscus Plant Diseases To Look Out For!