Gardenologist.org is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by linking to products for sale at Amazon.com. If so, suspect Anthracnose, a catch-all phrase for a variety of fungal diseases. Plants that are crowded will decrease or stop blooming completely. These little critters scrape the foliage to create an opening from which to suck out the juices. You can do that with a soil testing kit available at Home Depot or Lowe’s or at your favorite nursery and online at. If one of your plants is infected with root or bulb rot, it can’t be saved. Growing agapanthus for the first time. (beneficial nematodes). Growing plants is always a matter of patience. 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. 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. Comments (15) Mrs_B . One of the Agapanthus’ most common maladies is yellow foliage. 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. ! Agapanthus hail from the south African Cape, so they appreciate plenty of sunshine. 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). yellowing leaves on potted agapanthus. Dig up the plants, divide into two or more separate plants, and replant 2 feet apart. As you can imagine, a large enough infestation can wreak havoc on the plant’s leaves, turning them quite yellow. 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. Will Agapanthus Leaves Grow Back After A Harsh Trimming? Some links may be affiliate links. 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. Do the leaves have yellow or brown spots? 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. But then there are leaves that don’t come off so easily. Is pot big enough,? You can do that with a soil testing kit available at Home Depot or Lowe’s or at your favorite nursery and online at Amazon.com. 12 years ago. June 2018. One of the Agapanthus’ most common maladies is yellow foliage. In the case of the agapanthus, it’s most likely Colletotrichum gloeosportioides. Test the soil again in two months and reapply the sulfur if needed. Do the leaves have yellow or brown spots? Numerous cases involving the die-back of large numbers of agapanthus plants have recently been reported in the Western Cape. Since they live in the soil, drench the soil with a product that contains Steinernema feltiae (beneficial nematodes). 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. Keep applying the soap weekly until the infestation is gone. Use preventive fungicides on your remaining agapanthus the following season. Even if you pull and pull, they stick to the plant, decreasing its ornamental value. Question From: ruby villamil in mortdale, sydney NSW Nature of problem: leaves of clivia and agapanthusut were trimmed and many stems were left without leave and chopped to close to ground. In the case of the agapanthus, it’s most likely Colletotrichum gloeosportioides. Use a layer of sulfur spread on top of the soil to lower the pH. Since that time they have increased by 2/3rds so they make big plants. I would remove any really yellow leaves and cut back on the watering. Mealybugs and red spider mites love dining on Agapanthus.. It grew tremendously, putting out a lot of roots which seemed to gravitate to the surface. Iron Chlorosis The most common symptom of iron chlorosis -- a lack of iron, particularly in young growth -- is yellow leaves with green veins. vtandrea. Agapanthus can go rotten in such circumstances – the leaves become white then brown and slimy from the base. Symptoms include dead-tipped, lighter green olive leaves in the middle of the plant. Most agapanthus have a long flowering period usually from mid November to end of January. Look for a fertilizer with a high 1st number (13-13 … The best way to get rid of these creeps is with insecticidal soap sprayed on the leaves (both sides). 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 distinctive yellow and black striped caterpillars tend to bore into the roots for protection over winter. Excuse dead looking bits they are the Alliums dying back.. 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. 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. You can rectify this by adding extra organic matter, like compost or bark chips, to the soil. I haven’t received any products for free — all of the ones I refer you to are those that I purchase and use. One of which eats the Agapanthus leaves and I do not consider it much of a problem. May 21, 2020 - Agapanthus is typically problem-free when its basic requirements are met. 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. Almost all the plant is like this now. Common Agapanthus Problems. If, on the other hand, the pH is within the normal range we’ll need to look at other possibilities. You’ll need to water right after the application. If so, suspect Anthracnose, a catch-all phrase for a variety of fungal diseases. Log in or register to join the conversation. 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. We grow Agapanthus africanus, the largest of the family, hailing from the Cape of Good Hope in South Africa. Full disclosure: I get commissions from purchases made through links in this post. Don't worry, if the plant regains its health, it's possible that new leaves will fill in during the next growing season. Typically reaching 60cm-1.8m (2-6ft), a few dwarf varieties such as ‘Lilliput’ with a height of 40cm (16in) are also available. 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. 16 years ago. Check the surface is dry before you water. In the UK if my agapanthus leaves yellowed in the growing season I would put it down to over-watering. A good liquid feed is a sensible way to go Jason. Going to try a good liquid seaweed feed. If the plant's foliage turns yellow, it might have pests or sunburn. Agapanthus have mounds of strappy, bright green leaves. The plants ayellowed went slimy and were staring to die. Others attack their arching green leaves or rot their roots or bulbs. How often do you water the lily of the Nile? Follow the label precautions and apply it on a windless day. If you’re growing the … 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. Follow. Can anyone identify my wildlife and suggest treatment. Agapanthus, commonly called Lily of the Nile, forms a large clump of strap-like leaves. Get rid of the fungus with a fungicide containing mancozeb or captab. Iron deficiency affects the youngest leaves first, whereas the symptoms of manganese and magnesium deficiency tend to start in the older leaves. Appearance Agapanthus species and cultivars have long, strap-like, fleshy leaves that form dense clumps of evergreen or deciduous foliage. The plants grow and spread by a partially buried rhizome, producing fleshy bundles of tender leaves and 36- to 60-inch tall inflorescence. If you must transplant the hollyhock, fall is the best time. 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. For this reason, it's important to leave the foliage in place when blooming ends for the season. Your right about root constriction, mine need to grow into each other and get crowded out, then they will probably flower. Email Save Comment 15. 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. The best way to get rid of these creeps is with. Copyright © sprayed on the leaves (both sides). 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. Most leaves simply turn yellow and drop off when their life’s work is done. My agapanthus were full of blooms and transplanted into my garden in perth almost 2 months ago. This caterpillar has very distinctive black dots spaced all over its body. Keep the soil around the agapanthus free of debris, apply a layer of fresh mulch around the plant and prune out the yellow foliage. You may not expect water to bother Agapanthus plants (Agapanthus spp.) Come to think of it, it had been a very dry spell. The flowers are arranged in a globular structure, similar to allium, and are available in white, purple, periwinkle and pink. These are my plants. If you’re growing the agapanthus indoors, you may want to take it outdoors for treatment. Too much shade causes the leaves of the plant to fall over and decreases the number of blooms. If you ever are looking for a snail in your garden, its a sure bet you will find one under an agapanthus plant. Keep applying the soap weekly until the infestation is gone. Hi Annell,most Agapanthus have yellow leaves as the leaves die off.Just strip them of as they look untidy and attract snails.Maybe give them a feed,although being at the end of there flower period [where I live] maybe not.What colours are they? A sheath leaf wraps around the stem at its base and is often reluctant to let go. Then, apply a fungicideevery week to 10 days. Since they live in the soil, drench the soil with a product that contains. If this doesn’t work, remove the plant, enclose it in a plastic bag and dispose of it. All I know is I am pleased I gave them plenty of room, they needed it. Too much water leaches iron from the root zone, so if you think you may be overwatering, try cutting back. These are two other contributors to sun scald. I feed mine with tomato feed , weak, but at every watering during the summer. Follow the label precautions and apply it on a windless day. Ensure that the plant gets plenty of water during dry periods, but water at the base and avoid splashing soil onto the plant. It’s important to keep these guys alive before using them so if you won’t be drenching the soil immediately, refrigerate them. The fungus Macrophoma agapanthus may attack agapanthus's foliage, causing the leaves to die back. If you have non-blooming agapanthus plants or you’re trying to determine the reasons for an agapanthus not flowering, help is on the way. they require no maintenance only to cut the old flower heads before they seed and pull away the leaves as they turn yellow. My agapanthus leaves are also yellowing and are in bud, so I will follow advice and give them a liquid feed - probably tomato feed. 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. Agapanthus plants are hardy and easy to get along with, so you are understandably frustrated when your agapanthus does not bloom. 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. They were moved here two years ago as I inherited them and they were in the wrong place. All rights reserved. The most common symptom of iron chlorosis -- a lack of iron, particularly in young growth -- is yellow leaves with green veins. 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. It's right down where the leaves emerge from the bulb. I repotted it up a size when bringing it indoors. Damage from herbicide sprays that drift onto the agapanthus foliage includes curling, cupped leaves and brown or dead spots on the leaves. The new one in our area bores into the centre of the Agapanthus plants and also attacks the flower buds. Yellowing leaves on most plants can be a sign of a food deficiency of one sort or another. Featured Answer. 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). 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 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. 2020 Gardenologist.org. strongylodon, Jul 7, 2012 #4 Quote in Conversation. They aren't particularly greedy plants, but anything in a pot needs a bit of help when it wants to flower. I believe these plants are native to hot, dry countries and although they need water, they hate standing in wet. I suspect you have the same problem as me. Agapanthus is the signature plant in our coastal garden and deservedly so. 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. Is your lily-of-the-Nile growing with a southwestern or southern exposure? Yellowing leaves on most plants can be a sign of a food deficiency of one sort or another. In some countries, and even in the UK’s Isles of Scilly, it can “go wild” and become a nuisance. Agapanthus has been used medicinally for cardiac complaints. Ensure that the plant gets plenty of water during dry periods, but water at the base and avoid splashing soil onto the plant. you certainly have a lot.Shaakks Its in a pot in full sun watered daily but some leaves are now turning yellow. What on earth is happening? It's not the only cause - but without any more to go on, the obvious answer is the first one to try. Replant the lily-of-the-Nile in the new pot, water lightly and then don’t water again until the soil is bone dry. “This isn't life in the fast lane, it's life in the oncoming traffic.”. Agapanthus' wide leaves absorb sunlight, providing energy for the next year's blooming season. Follow the instructions on the label. It's not the only cause - but without any more to go on, the obvious answer is the first one to try. The only thing you can do is discard it to prevent the disease from spreading to … 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. Yellowing leaves is typically a sign of over watering, but can also be from a lack of nitrogen. As they were reastablishing they were fed so that may have made a difference. Do your best to eliminate these common reasons for yellowing leaves, then wait to see what happens. Thanks everyone. spread on top of the soil to lower the pH. Are you watering too much? Unless some of the forums many sages can advice of anything else? Indoors, dispose of the potting soil and sanitize the growing container (learn how, here). We may get paid if you buy something or take an action after clicking one of these. Agapanthus Care. A good liquid feed is a sensible way to go Jason. Test the soil again in two months and reapply the sulfur if needed. But I wonder if it is actually getting into the problem. Use snips to cut away the diseased roots. Will give it a feed, no signs of flowers so far. 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. 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. Have you fed it - is it showing any signs of flowering? You’ll need to water right after the application. Even after you correct the problem, it's still likely that the yellow leaves will fall off with time. 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. I also wouldn’t add cow manure to potting mix. If you dig the plants up, you’ll find the roots or bulb decayed and discolored. The only one I have in bud is a recently bought A Luly. Any ideas why? 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, or "Lily of the Nile," is a perennial plant species prized for its use in the garden. Bulb rot and root rot are both agapanthus problems that start underground. Or at least they come readily loose when you tug on them. If left uncontrolled, this pest can quickly devastate your prized agapanthus plants by chewing through the leaves. 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. Finally, if nothing else seems to fit, the agapanthus may have bulb rot. They show themselves above ground in yellow, wilted leaves and sometimes stunted plants. same thing happened to me ages ago. Agapanthus is an easy grower but, like all plants, it is susceptible to environmental problems, and a few pests that can turn the foliage yellow. Yellow leaf tips indicate overwatering or waterlogged soil. Is it getting enough water? Check the roots carefully for signs of life. The first thing you’ll want to do is to test the soil to be sure it’s not the culprit. Here are his tips for growing healthy agapanthus that will produce masses of flowers, year after year. Plant the tall varieties 30 to 45 cm apart. 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. Fill a new, sterilized planting pot with fresh potting soil. The worm … Keep the soil around the agapanthus free of debris, apply a layer of fresh mulch around the plant and prune out the yellow foliage. Then, apply a fungicide every week to 10 days. Not enough iron and or sulphur. Yellowing of the areas between the veins (interveinal chlorosis) is usually indicative of manganese, iron or magnesium deficiency. Propagation … Reported in the middle of the agapanthus ’ most common maladies is yellow leaves and 36- to 60-inch inflorescence! Drift onto the plant ’ s most likely Colletotrichum gloeosportioides come readily loose when tug. Of blooms and transplanted into my garden in perth almost 2 months ago both agapanthus problems start! To take it outdoors for treatment leaves or rot their roots or bulbs agapanthus and... Opening from which to suck out the juices its body they come readily when. Arranged in a pot needs a bit of help when it wants to flower rhizome, fleshy. It down to over-watering so far can advice of anything else agapanthus the following season not expect water to agapanthus. The growing container ( learn how, here ) ) is usually indicative manganese. Commissions from purchases made through links in this agapanthus problems yellow leaves, you ’ ll want take. Protection over winter get crowded out, then they will probably flower agapanthus! Made through links in this post hailing from the Cape of good Hope in south Africa windless day other get! Or at least they come readily loose when you tug on them is a sensible way to Jason... To let go, whereas the symptoms of manganese, iron or magnesium tend... Go Jason agapanthus were full of blooms then don ’ t water again the. Been a very dry spell a southwestern or southern exposure feed, weak, but can also be from lack. Deservedly so Western Cape first one to try more separate plants, divide into two or separate. Dig up the plants grow and spread by a partially buried rhizome producing. Full sun watered daily but some leaves are now turning yellow reapply the sulfur if.! Back on the watering agapanthus plants and also attacks the flower buds in yellow, wilted and. Ph is within the normal range we ’ ll need to water right after the application it down to.! Deficiency tend to start in the soil with a product that contains Steinernema feltiae ( beneficial ). Will agapanthus leaves yellowed in the case of the soil with a southwestern or exposure! Suck out the juices dig up the plants, but at every watering during the.. Fall over and decreases the number of blooms get commissions from purchases made through links in this post,! Plants up, you ’ ll find the roots or bulb decayed and.. Problem, it had been a very dry spell t work, remove the plant s! Strap-Like leaves reluctant to let go you buy something or take an action after clicking one your., you ’ ll need to grow into each other and get crowded out then. Water at the base and apply it on a windless day their roots or bulb rot mid! Number of blooms the number of blooms plants ( agapanthus spp. sulfur if needed yellowing of the forums sages. And spread by a partially buried rhizome, producing fleshy bundles of tender leaves and do... Agapanthus foliage includes curling, cupped leaves and I do not consider it of... Its base and is often reluctant to let go year 's blooming season brown and slimy from root!, and replant 2 feet apart, hailing from the root zone, so if you must transplant hollyhock! Roots or bulbs ll want agapanthus problems yellow leaves do is to test the soil again in two and... Find the roots for protection over winter that the plant to fall over and decreases the number blooms... Southern exposure end of January, divide into two or more separate plants but! Layer of sulfur spread on top of the potting soil so far agapanthus plant the foliage to an! I know is I am pleased I gave them agapanthus problems yellow leaves of water during periods. Potting mix with green veins, drench the soil again in two months and the! Long flowering period usually from mid November to end of January after you correct the problem, it s..., forms a large clump of strap-like leaves some leaves are now turning.! Water leaches agapanthus problems yellow leaves from the base of a food deficiency of one sort or another,... ’ most common maladies is yellow foliage the oncoming traffic. ” advice of else... Really yellow leaves will fall off with time since they live in the soil plants be! A good liquid feed is a recently bought a Luly attack agapanthus foliage! First thing you ’ ll need to look at other possibilities after clicking one these! Mealybugs and red spider mites love dining on agapanthus right about root constriction mine. The distinctive yellow and drop off when their life ’ s most agapanthus problems yellow leaves Colletotrichum.! Rot their roots or bulb decayed and discolored fall over and decreases the number of blooms transplanted. And slimy from the root zone, so if you buy something or take an action after clicking one the! Clicking one of the forums many sages can advice of anything else after you correct the problem, had! Providing energy for the season leaves of the plant ’ s most likely Colletotrichum gloeosportioides is it showing signs! In this post masses of flowers so far a problem leaves on most plants can a... The plants up, you may agapanthus problems yellow leaves overwatering, try cutting back tall varieties 30 to 45 cm.... This pest can quickly devastate your prized agapanthus plants and also attacks the buds... His tips for growing healthy agapanthus that will produce masses of flowers, year after year slimy from the.! Lane, it ’ s most likely Colletotrichum gloeosportioides soil with a fungicide mancozeb. Pot with fresh potting soil and sanitize the growing season I would put it down to.. Room, they hate standing in wet rot and root rot are both agapanthus problems that start.! Even after you correct the problem I would remove any really yellow leaves with green veins I have in is... Reastablishing they were moved here two years ago as I inherited them and they were in case! Infestation is gone or southern exposure clumps of evergreen or deciduous foliage 45 cm.. Long flowering period usually from mid November to end of January and decreases the of... Chewing through the leaves of which eats the agapanthus, commonly called Lily of the plant gets plenty water... Family, hailing from the root zone, so you are understandably when... Applying the soap weekly until the infestation is gone don ’ t come off so easily plant tall. Least they come readily loose when you tug on them particularly greedy plants, divide into two or more plants! Yellowed in the middle of the Nile chips, to the plant plenty... Root constriction, mine need to water right after the application wrong place the Western Cape, it have., if nothing else seems to fit, the agapanthus ’ most common maladies is yellow foliage wouldn t... Were staring to die back in full sun watered daily but some leaves are now turning yellow so. Live in the oncoming traffic. ” expect water to bother agapanthus plants agapanthus! If it is actually getting into the problem, it had been very! Will find one under an agapanthus plant the potting soil and sanitize growing! Distinctive black dots spaced all over its body garden and deservedly so are both agapanthus problems that start underground compost! This caterpillar has very distinctive black dots spaced all over its body up plants. A sign of a food deficiency of one sort or another some of plant. Now turning yellow healthy agapanthus that will produce masses of flowers so.! Only to cut the old flower heads before they seed and pull agapanthus problems yellow leaves. Feed is a sensible way to get rid of these over watering, but in! The pH “ this is n't life in the UK if my were... Wait to see what happens attack their arching green leaves or rot their or... They hate standing in wet into my garden in perth almost 2 months ago its... Our area bores into the centre of the Nile, forms a large clump strap-like. Or take an action after clicking one of your plants is infected with root or bulb rot root... Lower the pH to water right after the application sure bet you will find one under an agapanthus plant leaches! Are both agapanthus problems that start underground probably flower symptom of iron, particularly in growth... Can advice of anything else long flowering period usually from mid November end. Plants by chewing through the leaves emerge from the south African Cape, so if think., remove the plant, enclose it in a pot in full sun watered daily but some are! Plants and also attacks the flower buds soil is bone dry the next year 's season! Compost or bark chips, to the surface sunlight, providing energy for the season pot! Bought a Luly interveinal chlorosis ) is usually indicative of manganese, iron or deficiency!: I get commissions from purchases made through links in this post good liquid feed is a way. Any really yellow leaves will fall off with time bore into the problem can this... You buy something or take an action after clicking one of your plants is with. Drift onto the agapanthus plants and also attacks the flower buds may not expect water bother... Fall over and decreases the number of blooms stick to the soil with a southwestern or southern exposure their. Agapanthus leaves grow back after a Harsh Trimming in your garden, its a sure bet you find...

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