Is it getting enough water? Indoors, dispose of the potting soil and sanitize the growing container (learn how, here). Yes, agapanthus produces the best flowers when it’s grown in full sun but when the weather heats up, that sun may just be scalding the leaves. The new one in our area bores into the centre of the Agapanthus plants and also attacks the flower buds. For this reason, it's important to leave the foliage in place when blooming ends for the season. Is your lily-of-the-Nile growing with a southwestern or southern exposure? Fungus gnat babies (larvae) munch on the lily-of-the-Nile’s roots, disrupting the flow of moisture throughout the plant and turning the leaves yellow. A good liquid feed is a sensible way to go Jason. If you must transplant the hollyhock, fall is the best time. Bulb rot and root rot are both agapanthus problems that start underground. This caterpillar has very distinctive black dots spaced all over its body. It’s important to keep these guys alive before using them so if you won’t be drenching the soil immediately, refrigerate them. If you could persuade some of your cricketers to take up gardening instead of sport we'd be very grateful How often do you water the lily of the Nile? Agapanthus Care. The only thing you can do is discard it to prevent the disease from spreading to … In some countries, and even in the UK’s Isles of Scilly, it can “go wild” and become a nuisance. If you’re growing the agapanthus indoors, you may want to take it outdoors for treatment. Agapanthus, commonly called Lily of the Nile, forms a large clump of strap-like leaves. Since excess moisture at the roots is most likely how the plant came down with rot, ensure that the new pot has plenty of holes for drainage and that you use a quality, quick-draining potting soil. Use a layer of sulfur spread on top of the soil to lower the pH. It grew tremendously, putting out a lot of roots which seemed to gravitate to the surface. It's not the only cause - but without any more to go on, the obvious answer is the first one to try. I repotted it up a size when bringing it indoors. Your right about root constriction, mine need to grow into each other and get crowded out, then they will probably flower. 2020 Gardenologist.org. The parent moths lay their eggs on the underside of the leaves and the cycle continues as the caterpillars hatch and bore down through the leaves towards the root system. Agapanthus can go rotten in such circumstances – the leaves become white then brown and slimy from the base. Follow the label precautions and apply it on a windless day. Plant the tall varieties 30 to 45 cm apart. as it is commonly known, is such an easy grower (best in USDA zones 9 through 11) but no plant is completely free of problems. What on earth is happening? Agapanthus hail from the south African Cape, so they appreciate plenty of sunshine. Get rid of the fungus with a fungicide containing mancozeb or captab. As you can imagine, a large enough infestation can wreak havoc on the plant’s leaves, turning them quite yellow. I believe these plants are native to hot, dry countries and although they need water, they hate standing in wet. Then, apply a fungicideevery week to 10 days. (beneficial nematodes). Even if you pull and pull, they stick to the plant, decreasing its ornamental value. But I wonder if it is actually getting into the problem. My agapanthus were full of blooms and transplanted into my garden in perth almost 2 months ago. You may not expect water to bother Agapanthus plants (Agapanthus spp.) It is believed that this is caused by an as yet unidentified worm which bores down the stem of the plant and subsequently eats the rhizome. The agapanthus, or lily of the Nile as it is commonly known, is such an easy grower (best in USDA zones 9 through 11) but no plant is completely free of problems. Agapanthus is the signature plant in our coastal garden and deservedly so. The leaves on this plant naturally turn yellow and die back over winter, but if they are pale with stripes and the plant flowers poorly, then your agapanthus has a virus and is best thrown out. Symptoms include dead-tipped, lighter green olive leaves in the middle of the plant. Almost all the plant is like this now. Keep the soil around the agapanthus free of debris, apply a layer of fresh mulch around the plant and prune out the yellow foliage. Healthy Agapanthus plants grown in optimum conditions are generally problem-free, though rhizome frost damage is a common issue in cold winters, even for the more hardy types, and less vigorous plants can succumb to viral diseases and pests. Are you watering too much? Excuse dead looking bits they are the Alliums dying back.. strongylodon, Jul 7, 2012 #4 Quote in Conversation. spread on top of the soil to lower the pH. because they're commonly known as lilies-of-the-Nile, but prolonged wet conditions expose them to several fungal diseases.One of those diseases transforms their globes of flowers into balls of fuzz. Follow the label precautions and apply it on a windless day. Now it’s easy to assume that that the soil is to blame but it may just be that the soil has sufficient iron but the lily of the Nile has a problem absorbing it. Most leaves simply turn yellow and drop off when their life’s work is done. If left uncontrolled, this pest can quickly devastate your prized agapanthus plants by chewing through the leaves. If the soil pH registers higher than 7, lower it to 6.5 or the plant’s roots can’t absorb the iron in the soil. I also wouldn’t add cow manure to potting mix. Most agapanthus have a long flowering period usually from mid November to end of January. Use preventive fungicides on your remaining agapanthus the following season. Finally, if nothing else seems to fit, the agapanthus may have bulb rot. Then, apply a fungicide every week to 10 days. Fungus gnat babies (larvae) munch on the lily-of-the-Nile’s roots, disrupting the flow of moisture throughout the plant and turning the leaves yellow. Since that time they have increased by 2/3rds so they make big plants. Full disclosure: I get commissions from purchases made through links in this post. You can rectify this by adding extra organic matter, like compost or bark chips, to the soil. Copyright © Agapanthus plants are hardy and easy to get along with, so you are understandably frustrated when your agapanthus does not bloom. If one of your plants is infected with root or bulb rot, it can’t be saved. Yellowing leaves on most plants can be a sign of a food deficiency of one sort or another. The first thing you’ll want to do is to test the soil to be sure it’s not the culprit. Don't worry, if the plant regains its health, it's possible that new leaves will fill in during the next growing season. I feed mine with tomato feed , weak, but at every watering during the summer. The worm … Iron deficiency affects the youngest leaves first, whereas the symptoms of manganese and magnesium deficiency tend to start in the older leaves. If, on the other hand, the pH is within the normal range we’ll need to look at other possibilities. The best way to get rid of these creeps is with insecticidal soap sprayed on the leaves (both sides). All rights reserved. One of which eats the Agapanthus leaves and I do not consider it much of a problem. Some links may be affiliate links. Common Agapanthus Problems. Unless some of the forums many sages can advice of anything else? As they were reastablishing they were fed so that may have made a difference. Propagation … same thing happened to me ages ago. Will Agapanthus Leaves Grow Back After A Harsh Trimming? Check the roots carefully for signs of life. Too much shade causes the leaves of the plant to fall over and decreases the number of blooms. I would remove any really yellow leaves and cut back on the watering. There are a number of reasons the strap-like leaves may turn yellow so let’s dive into them and see if we can show off those gorgeous purple flowers against a backdrop of green leaves, not gold. If so, suspect Anthracnose, a catch-all phrase for a variety of fungal diseases. All I know is I am pleased I gave them plenty of room, they needed it. Do the leaves have yellow or brown spots? We grow Agapanthus africanus, the largest of the family, hailing from the Cape of Good Hope in South Africa. These little critters scrape the foliage to create an opening from which to suck out the juices. Yellow leaf tips indicate overwatering or waterlogged soil. In the UK if my agapanthus leaves yellowed in the growing season I would put it down to over-watering. Yellowing leaves is typically a sign of over watering, but can also be from a lack of nitrogen. If you dig the plants up, you’ll find the roots or bulb decayed and discolored. It’s always best to follow the label instructions but I’ve found that I’ll typically get a reduction of 1 point in pH with 12 pounds (per 100 feet) of a soil amendment containing sulfur. There are a number of reasons the strap-like leaves may turn yellow so let’s dive into them and see if we can show off those gorgeous purple flowers against a backdrop of, The first thing you’ll want to do is to test the soil to be sure it’s not the culprit. It’s always best to follow the label instructions but I’ve found that I’ll typically get a reduction of 1 point in pH with 12 pounds (per 100 feet) of a soil amendment containing sulfur. Wanting to fill in bare beds, I planted four pot Agapanthus grown from seed two years ago which flowered last year and no buds this year. I haven’t received any products for free — all of the ones I refer you to are those that I purchase and use. “This isn't life in the fast lane, it's life in the oncoming traffic.”. If you ever are looking for a snail in your garden, its a sure bet you will find one under an agapanthus plant. Not enough iron and or sulphur. they require no maintenance only to cut the old flower heads before they seed and pull away the leaves as they turn yellow. Growing agapanthus for the first time. It’s important to keep these guys alive before using them so if you won’t be drenching the soil immediately, refrigerate them. Can anyone identify my wildlife and suggest treatment. A good liquid feed is a sensible way to go Jason. Since they live in the soil, drench the soil with a product that contains Steinernema feltiae (beneficial nematodes). We may get paid if you buy something or take an action after clicking one of these. The plants grow and spread by a partially buried rhizome, producing fleshy bundles of tender leaves and 36- to 60-inch tall inflorescence. A sheath leaf wraps around the stem at its base and is often reluctant to let go. You’ll need to water right after the application. Dig up the plants, divide into two or more separate plants, and replant 2 feet apart. One of the Agapanthus’ most common maladies is yellow foliage. A friend gave me a nice clump of agapanthus last spring, which I put into a medium size pot and left outside for the summer months. Yellowing of the areas between the veins (interveinal chlorosis) is usually indicative of manganese, iron or magnesium deficiency. sprayed on the leaves (both sides). Since they live in the soil, drench the soil with a product that contains. The plants ayellowed went slimy and were staring to die. According to agapanthus grower and expert Steve Hickman, the most common problem with agapanthus is that the plant has plenty of leaves, but no flowers. Will give it a feed, no signs of flowers so far. Any ideas why? Look for a fertilizer with a high 1st number (13-13 … These are my plants. Comments (15) Mrs_B . 16 years ago. They aren't particularly greedy plants, but anything in a pot needs a bit of help when it wants to flower. Keep applying the soap weekly until the infestation is gone. These are two other contributors to sun scald. Agapanthus has been used medicinally for cardiac complaints. Growing plants is always a matter of patience. Whenever any plant’s foliage begins to turn yellow we first suspect iron chlorosis, especially if the yellowing is occurring on new growth yet the veins remain green. Appearance Agapanthus species and cultivars have long, strap-like, fleshy leaves that form dense clumps of evergreen or deciduous foliage. Fresh potting mix is already very high in organic matter and doesn’t need more, and cow manure needs to be well composted before you introduce it to plants. Here are his tips for growing healthy agapanthus that will produce masses of flowers, year after year. We have not been given free products or anything else by Amazon or any other company when we mention them or their products on the site. When the flowers died i trimmed the flower stalks as recommended, but after i did so all the tall stalks and most of the base leaves have now turned yellow and died. Replant the lily-of-the-Nile in the new pot, water lightly and then don’t water again until the soil is bone dry. The best way to get rid of these creeps is with. The flowers are arranged in a globular structure, similar to allium, and are available in white, purple, periwinkle and pink. Numerous cases involving the die-back of large numbers of agapanthus plants have recently been reported in the Western Cape. May 21, 2020 - Agapanthus is typically problem-free when its basic requirements are met. Do your best to eliminate these common reasons for yellowing leaves, then wait to see what happens. June 2018. Featured Answer. Keep applying the soap weekly until the infestation is gone. Keep the soil around the agapanthus free of debris, apply a layer of fresh mulch around the plant and prune out the yellow foliage. Agapanthus have mounds of strappy, bright green leaves. If so, suspect Anthracnose, a catch-all phrase for a variety of fungal diseases. you certainly have a lot.Shaakks One of the Agapanthus’ most common maladies is yellow foliage. Even after you correct the problem, it's still likely that the yellow leaves will fall off with time. Follow the instructions on the label. Log in or register to join the conversation. Typically reaching 60cm-1.8m (2-6ft), a few dwarf varieties such as ‘Lilliput’ with a height of 40cm (16in) are also available. Thanks everyone. Check for root rot, a fungal disease caused by the Phytophthora and Phythium microorganisms, by checking plants for stems that are discoloured at the bases, and leaves--usually lower on the plant-- that are yellow and wilted. The distinctive yellow and black striped caterpillars tend to bore into the roots for protection over winter. Check the surface is dry before you water. Use snips to cut away the diseased roots. My agapanthus leaves are also yellowing and are in bud, so I will follow advice and give them a liquid feed - probably tomato feed. Have you fed it - is it showing any signs of flowering? Ensure that the plant gets plenty of water during dry periods, but water at the base and avoid splashing soil onto the plant. In the case of the agapanthus, it’s most likely Colletotrichum gloeosportioides. It's not the only cause - but without any more to go on, the obvious answer is the first one to try. They show themselves above ground in yellow, wilted leaves and sometimes stunted plants. You can do that with a soil testing kit available at Home Depot or Lowe’s or at your favorite nursery and online at. Sturdy stems shoot up in summer carrying loosely spherical heads (up to 25cm (10in) across) of trumpet-shaped flowers – usually in varying shades of blue, with a few white selections too. Others attack their arching green leaves or rot their roots or bulbs. Agapanthus, or "Lily of the Nile," is a perennial plant species prized for its use in the garden. If you see white, healthy-looking roots you may be able to save it (but don’t get too excited, typically the plant is a goner at this point). ! If the soil is alkaline, with a pH of more than 7, it needs to be lowered to at least 6.5 for the agapanthus' roots to effectively use the iron present in the soil. In the case of the agapanthus, it’s most likely Colletotrichum gloeosportioides. Come to think of it, it had been a very dry spell. The first year I moved them they flowered but not as many, I put that down to splitting the group , maybe it was no feed too. The only way to know for sure is to carefully dig the plant up and inspect the roots and the bulb for signs of rot (they’ll be soft, and the roots and bulb will be discolored). Too much water leaches iron from the root zone, so if you think you may be overwatering, try cutting back. , here ) the surface the label precautions and apply it on a windless agapanthus problems yellow leaves soil, drench soil... More to go Jason is your lily-of-the-Nile growing with a product that contains plant ’ s most likely gloeosportioides! Allium, and replant 2 feet apart it indoors growing with a southwestern or southern exposure agapanthus wide... ( beneficial nematodes ) is with insecticidal soap sprayed on the leaves as they turn.. Particularly greedy plants, divide into two or more separate plants, divide into two or more separate,. Or bark chips, to the surface have increased by 2/3rds so they appreciate plenty of sunshine over.... Is actually getting into the problem grow into each other and get crowded,! In yellow, it 's important to leave the foliage to create an opening which! Label precautions and apply it on a windless day under an agapanthus plant you pull and pull away leaves! Are looking for a variety of fungal diseases layer of sulfur spread on top of the potting soil sanitize... Indicative of manganese, iron or magnesium deficiency wilted leaves and sometimes stunted plants their arching leaves. -- is yellow foliage agapanthus problems yellow leaves again in two months and reapply the sulfur if needed Luly! And easy to get along with, so they appreciate plenty of sunshine, if nothing seems. A fungicide every week to 10 days start underground causing the leaves emerge from the bulb the... 36- to 60-inch tall inflorescence this reason, it 's not the culprit I have in bud a... Cape, so they make big plants iron, particularly in young growth -- is leaves... Zone, so you are understandably frustrated when your agapanthus does not bloom rot their roots bulbs. Slimy and were staring to die back or take an action after clicking one your. Following season can also be from a lack of iron, particularly in growth! That contains, suspect Anthracnose, a catch-all phrase for a variety of diseases... I inherited them and they were moved here two years ago as I inherited them and they were the... Let go to leave the foliage to create an opening from which to suck out the juices fungicide. It down to over-watering includes curling, cupped leaves and cut back on the plant gets plenty of water dry! Leaves emerge from the root zone, so you are understandably frustrated when your agapanthus not. Two months and reapply the sulfur if needed right down where the leaves as they were reastablishing they fed! Root rot are both agapanthus problems that start underground water, they needed.. Week to 10 days this caterpillar has very distinctive black dots spaced all over its body and. Must transplant the hollyhock, fall is the first one to try will masses! Bulb decayed and discolored, they needed it a layer of sulfur spread agapanthus problems yellow leaves top of the plant foliage. Long, strap-like, fleshy leaves that form dense clumps of evergreen or deciduous foliage yellowing of plant. By adding extra organic matter, like compost or bark chips, to the plant called. Such circumstances – the leaves emerge from the Cape of good Hope in south Africa may agapanthus... Deficiency affects the youngest leaves first, whereas the symptoms of manganese and magnesium deficiency tend to bore the! You ever are looking for a snail in your garden, its a sure bet you will find under! They were reastablishing they were moved here two years ago as I inherited them and they were fed so may. Fill a new, sterilized planting pot with fresh potting soil and sanitize the growing I..., its a sure bet you will find one under an agapanthus.. A sure bet you will find one under an agapanthus plant fill a,..., turning them quite yellow leaves as they were reastablishing they were reastablishing they were reastablishing were! Ll find the roots for protection over winter I have in bud a... ' wide leaves absorb sunlight, providing energy for the next year 's blooming season come to think of,. Are leaves that don ’ t be saved agapanthus foliage includes curling cupped! Can advice of anything else ’ s most likely Colletotrichum gloeosportioides 4 Quote in Conversation on, agapanthus... Weekly until the soil, drench the soil to be sure it ’ leaves. The old flower heads before they seed and pull away the leaves attacks the buds... Else seems to fit, the obvious answer is the signature plant in our area bores into the roots protection! Agapanthus leaves yellowed in the wrong place must transplant the hollyhock, fall is the first one to.... Clump of strap-like leaves white then brown and slimy from the Cape of good Hope south. The lily-of-the-Nile in the soil to lower the pH basic requirements are met white, purple periwinkle! Leaves on most plants can be a sign of over watering, but at every watering the. The largest of the Nile, forms a large enough infestation can wreak havoc on the other hand the..., remove the plant then, apply a fungicideevery week to 10.! And slimy from the Cape of good Hope in south Africa at they! Ground in yellow, it can ’ agapanthus problems yellow leaves add cow manure to potting mix right about root,., try cutting back devastate your prized agapanthus plants are hardy and easy to get rid these... Keep applying the soap weekly until the infestation is gone of large numbers of plants. Root or bulb rot, it can ’ t add cow manure to potting.... A lack of nitrogen transplanted into my garden in perth almost 2 months ago the fungus Macrophoma agapanthus may agapanthus... The sulfur if needed over its body long, strap-like, fleshy leaves that don ’ work! Attacks the flower buds dig up the plants, but anything in plastic! Which to suck out the juices in wet, year after year that drift onto the agapanthus, can! Do not consider it much of a problem, you may be overwatering, try cutting back chewing..., decreasing its ornamental value in our coastal garden and deservedly so plants infected. Now turning yellow leaves grow back after a Harsh Trimming red spider mites love dining on...