8 Reasons why Plant Leaves Turn Yellow
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- čas přidán 27. 07. 2024
- If your plant's foliage begins to yellow or discolor, there are quite a few potential causes. In this video, I'll discuss 8 reasons for yellowing leaves on plants:
00:00 Intro
00:55 Moisture Stress
03:21 Nutrient Deficiency
04:53 Root Damage
06:03 Natural Variation
06:52 Foliar Fungus
07:59 Spider Mites
08:52 Herbicide Damage
09:33 Virus
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I did some research and read that RMV hasn’t been proven to be transmittable so it isn’t a threat in the garden and the only way it can spread is by grafting the plant by rooting a cutting, using an infected scion, or growing on an infected rootstock. I apparently have an infected rose bush but I don’t want to kill it if it can’t hurt my other plants. So why did you make that recommendation? Were the tests not good enough so your recommendation is to act out of an abundance of caution or do you know someone who had an RMV infected plant that spread to other roses in their garden? Thanks
Hi Lauren. Well, I sure hope viewers are also checking the comments, because this is a very good point. I'll pin this to the top of the comments section to improve the chances people see it. I've been basing my assumptions on older research (where it was thought insects and pruning tools were a major factor in spreading the disease), and it seemed to make sense to what I learned in hort school about virus transmission - so I hadn't looked up the newer studies. My fault. Some university and college fact sheets on the virus still warn about those causes, so I don't feel so bad. But then, most horticulture departments are pretty cautious anyhow - I recall that they wouldn't let students who were smokers handle the tomato plants without fresh gloves because they said it could transmit TMV from their cigarettes. In my case, I'm still going to err on the side of caution for a couple of reasons: 1) I'm a commercial supplier of roses, so the consequences of being wrong are higher for me, and 2) it would be pretty difficult to design a study large enough to rule it out entirely. The virus must have had some mode of spreading in nature (prior to humans mucking about with bud grafting) - and root grafting alone as a mode of transmission would have kept the virus(es) constrained to quite a local distribution. For those seeing these or other RMV symptoms on plants in their gardens, though, I'm going to backtrack on my recommendation in the video and say that if the markings don't bother you, and the virus doesn't seem to be impacting garden performance significantly, AND you're not using the plant for propagation, then you might want to keep the rose. It looks like the risk of spreading my hand tools is lower than I thought (but please still clean your tools!)
Fraser Valley Rose Farm Ok, that makes perfect sense to me. I also read that RMV is more of a symptom of the “type” of virus and that there are many viruses that cause mosaic in roses. Not sure how true that is but either way yeah I’d say there isn’t near enough research to make that large of a gamble (for folks like you) and if I had roses in my collection that were more difficult to get my hands on I would be more cautious probably. Apparently there are some suppliers that at least in the past have been notorious for propagating diseased roses and the rose that is showing symptoms is an Alfred Sisley I bought from Walmart a few months ago. It’s really pretty and I couldn’t find any accounts of the virus spreading from infected to unaffected plants so I’m ok with rolling the dice. If it does spread that’s at least valuable info I can share.
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If there is a better professional gardening channel I am not aware of it. Thanks Jason! You’re doing Lord’s work
I appreciate your telling me the specific reasons of yellowing leaves. Your expert knowledge, close up photos, and verbal explanations are the best of all CZcams channels. Thank you.
Wow, your full of information today, hopefully I don’t ever have anything worst than a watering problem. Thanks for sharing 👍❤️😊
Your always give us much better and more information than other similar videos. Many thanks for sharing the information and your wisdom.
My goodness where you live looks just spectacular. I found myself looking more at the background and missing the video lol. Just beautiful! Now I will repeat and actually watch the whole video this time 😊
Great video...thanks! A couple weeks ago, I learned to not to mix unbroken down compost with soil - it made my tomato plant's leaves turn yellow. I've been using fish emulsion and blood meal for nitrogen and they're recovering.
thank you .. the surrounding place is beautiful.. love this view
Great vid! To the point. Good examples. Thank you.
Really helpful, thank you!
So glad you mentioned 24 hrs in a bucket of water for pot plants. I use it and it saves carting water about and saves a huge amount of water. In summer, if I have 8 pots I just move the bucket from one plant to another each night . This produces a soak-and-dry cycle most plants seem to like and it reduces black spot etc forming overnight on wet leaves.
Good video info, esp on over feeding. I have had problems using what I thought was mostly compost but someone had put manure in it. (Communal living!).
Thanks so much for this very helpful info.
Thanks again, very helpful!
This is really interesting. Thanks for your video.
Excellent informative video that goes really in depth. Thank you.
Hi bro thankyou for sharing the idea,by the way silent viewer here from the philippines 🇵🇭
Thanks for the video. Great tips.
Outstanding information! Thank you for the video. Your detail far surpasses any video I have seen to date. Keep it up!
Thanks for the encouragement!
Really a very helpful clip for caring our plants ...👌👌👍👍👍
Great video! Thank you!!
Thanks lot. I'm from Illinois, northern. Always had roses in planters but last year you inspired me to not worry about planting roses in direct soil. If they survive then they are champions. Thanks again
Great approach. Thanks Prajakta
Very informative! Thank you for this video! :)
Very helpful! Thank you!!
Really helpful for me, thanks.
Thank you very much! This is what I need .Professional tips.👍👍👍👍
Thanks Jason - love your video's - so helpful :)
My pleasure Helen. Thanks for watching
Very useful, thank you.
Brilliant info and presentation. Thanks.
My pleasure George.
Excellent info. Thanks so much for compiling this and also including examples which is most helpful.
My pleasure Barbara
Thanks for the information, very usefull.
1:29 time for a new jacket?😜
My new favorite gardening channel 🌻
You’re doing a wonderful job thank you
Thanks so much 😊
Thanks for very informative knowledge
8 reasons why plants turn yellow:
1) Moisture or drought stress (due to not enough water soaking the root zone)
2) Nutrient Deficiency (due to high or low pH, not enough fertility)
3)Root damage (due to excess moisture or fertilizer)
4)Natural Variation
5)Foliar Fungus
6)Insects (spider mites etc)
7)Herbicide damage (may be from nearby spraying or contaminated compost)
8)Virus (probably due a insect vector like whiteflies or aphids or thrips)
Thank you for your knowledge on plants and keeping it true because you've helped me a lot for the past two years on my Rose 🌹
A nitrogen or a magnesium deficiency can also cause this. It's less common in roses but I've had it happen with both dahlias and gardenias. An easy way to tell, is if it's mainly concentrated in one area, either upper (magnesium) or lower (nitrogen) half of the plant. It's easily fixed with some epsom salts and an organic fertilizer.
Thanks!
Excellent video. It was very helpful. Thank you!
great examples… many thanks 😊
I thoroughly enjoyed your video, Jason. I'm planning on taking online horticulture classes to up my game in plant physiology. This is right up there! If you have any recommendations for online plant programs, I'd love to hear them, as I'm sure would others!
Thanks. I know a couple of people who took their horticulture training through U of Guelph, and liked it a lot. They have online courses too.
Thank you so much.. Very useful video 👍
Thanks. very good and informative!
Thank you. Very informative.
What a great video! Now I know why my watermelon plants are turning yellow, I’ve put them in a bigger pot. Hope it helps! Thank you!
Happy you figured it out!
Thank you again for good info🙏👍🏽
You are a superb teacher! Thank you,
Thanks Andrea
thanks for the information!
Very informative 👏 and detailed way... 👍
Soooo helpful thankyou
Thank you.
very informative!
Can’t seem to keep black spot off the roses here in the Pacific Northwest. Gonna go rewatch that video.
Very helpful thanks 😊👍👏👏👏🙋♀️
Thanks
Having fun binge watching your videos Jason and learning so much - I'll have to come back and watch some of them again. Warm regards Jennie
Oh no! I thought it's the other way around. I just cut off the leaves or branch. Good to know. Thank you.
It's a very beautiful place
Another helpful video. Seems to answer why I've seen a clients Rhododendron and Camilla leaves getting bronze appearance, due to cool, dry weather during April. Not a good combination to have frost after warm (15c+) days, no rain, and thus waking up under stress due to a lack of access to iron I suppose?
Another reason for yellowing of leaves can be if the water supply has fluoride, chlorine or heavy metals present. Seems to be a bigger issue for house plants, but I suppose it could also be a problem for outdoor plants.
Thanks for pointing out the concern with chlorine and metals in the water supply. Definitely worth considering your water source.
You are such a nice informative guy, how can you have dislikes?
Aw, thanks.
Thank you for sharing, I really appreciated all your information again Thanks 👍❤️😊
So nice to hear. Thanks for watching.
Instead of burning infected leaves I have put them in the microwave on high for a minute or two. Interesting vid and learned something here.
The one issue I am seeing in coastal Oregon is black spot on some of the hybrid teas that were on the farm before I was hear . Since I am a no spray or pesticide farm , I have stayed away from hybrid teas, and look for sturdier cultivars. No matter how clean and fresh mulched I am around dome of the hybrid teas, black spot plagues them sometime in the season.
thank you for a practical guide.
when starting out in gardening and not having basics right (potting medium and fertilization) it's all too easy to mis-diagnose and start dosing this or that. even with image search or others' opinion on photos or actual foliage, it can be hit or miss affair. the plant should be assessed from root conditions upwards, as you described, and a regular fertilization regimen that also helps with diagnosis. new gardeners are eager to try yet another new fertilizer and cannot tell the norm from irregular, as they either stop fertilizing and plan another trip to get more, or overdose new fertilizer they have no prior experience with. no thanks to box stores with barely any knowledgable staff, and those dastardly NPK ratios on brands all over the place.
Thanks Chris
Thank u!!!
Hi Jason. When we bought our house about 4 years ago, our large rhododendrons (ranging from 2 - 4m tall) looked stunning. However, for the last two years they have all shown signs of chlorosis. The plants range from 50-70 years old and the soil is clay loam (PH 5.5 - 6). They do respond positively to feed containing iron/magnesium, but this really doesn't seem to last long at all. It feels like I would have to feed them every couple of weeks, which I know to be way above any recommendations. All I can add is that the problem gets progressively worse after flowering and new growth has developed. Do you have any idea what the cause might be or what I can do? Thanks as always for the great videos..
Edit: Just a thought... If you have the ability to accept "superchats", you could make some additional cash by accepting donations alongside questions in a live stream. Perhaps another business opportunity in these hard times? Hope you are well.
Read many articles on yellowing leaves and causes. None mentioned White Grubs (Beetle Lavers) under the top soil. I grabbed my rose from the top and it just popped out the soil. I emptied the soil and there they were having a good feed on my Rose roots. :(. Taking your advise and lifting the rose out the pot led me to this.
Thanks Jon
Just as expected, this video is very helpful. Very helpful is kind of an understatement; in your videos not only you provide the answers to our question and concerns and then some but you even take the time to tell us exactly where to go in the video to save time and effort! wow! We are very appreciative for the wealth of info that you provide us all with to be able to care for our plants, specially our roses Than you very much !!!
Thanks for the feedback Marcy - I'm glad you find them useful!
Wow, by looks so much like Oregon coast
Wow the background looks amazing! Where is this place?
Just east of Mission BC Canada
Just subd and shared. Thanks
Thanks!
So late summer /fall time I notice my roses leave looked deform I thought it was rosacea and I cut it down a lot and told my husband to remove it before it infects the rest of my roses. He did not and the plant grew back with no signs of rosacea. Maybe it was roundup that caused the leaves to deform instead, from my neighbor's lawn care people. Anyway I'm so happy my husband did not listen to me and removed a good rose plant Thank you
Thanks - yes, some of the symptoms can be pretty similar. Happy to hear it turned out okay for you
Hi Jason
I have a Beautiful Rose tree dont Know its name big peach flower heads but not alot of leaves and it grows to over 3ft why no leaves . help if you can . I do enjoy your vidio.
Thank you, Jason, for this much-needed & timely info. A rose plant I recently transplanted is showing yellow in some mid-section leaves. From the reasons mentioned in your video, I suspect the culprit might be over- or under-watering.
Question: how can I determine if my rose is over-watered or under-watered? Thx in advance for your advice.
If it's in a pot it's far easier to check - in the ground, you can always dig down into the surrounding soil to check for overall soil moisture.
Please, can you tell me or the potassium permanganate helps against diseases of roses?
Thanks in advance
Good video.. Now all I have to find out is if its too much water or too little watering thats killing my plant
I have two roses near a trellis that have tiny holes in all the leaves. I don’t see any bugs What can this be and would Neam help?
Even my roses planted in the ground is getting watered almost everyday, the leaves from the bottom are starting to turn yellow.they are new bushes planted two months ago. Looks very healthy when they were planted in the first month but started to have bud balls lately. I just fertilize them, not sure if I have over fertilized them or over watered them. Please help! Your comments appreciated. Thank you so much.
Hi Jason do you have Judy Garland Floribunda rose? Thank you.
Can I add a few granules of ironite with 1-0-1 NPK that’s applied for for lawn on the base of the plant to just see if it works?
Hi Jason, thank you very much for your very interesting videos. My roses have leaves on the lower part of the plants that have white spots on them. Do you think that the white spots suggest there is a disease? In other leaves there little holes on them - more to the centre not on the edges. I also found affids but I took care of them by hand.
Hi Lila. When I hear white spots on roses, I think powder mildew (check google images for confirmation). It's a fungal infection, and you can do some good by thinning the growth of your roses to allow air circulation to the inside. A consistent supply of soil moisture also seems important. Little holes could be a lot of pests - beetles will punch little holes in leaves, but also snails. Unless the damage is severe and progressive, it may not be worth tracking down.
White spots can be mealy bugs also. Zoom in and see if they are bugs..
@@FraserValleyRoseFarm Many thanks for the reply
I suggest you do not mulch due to sicknesses, because it is only a ligh cover and those fungi will spread next your (natural way) but to spray Trichoderma fungus (the more the better) on those leaves and compost in general. Bacilus Subtilis will be good too (not for compost). The more aggressive the strains, the better.
Cause of the strongest coldest windddd
My potted african marigolds are putting out more blooms than before, thanks to you. It had yellow leaves so I was not watering it deeply enough. It's my mistake thinking since it's drought tolerant I don't have to water that much. Turns out like in your demo, the top soil is moist but bottom is dry.
Good to hear you've nailed down the problem!
I noticed this year some plants got yellow leaves while they grew very fast. Like in spring I repotted a houseplant (I grew it from a seed from an orange), its size doubled in 2 weeks and it got a lot of yellow leaves as if it need more nutrient. My apple tree also double its size this spring in a short period of time and got a lot of yellow leaves. But I assume plants should know how much nutrient they have and how fast they should grow...
Hi...yellow leaves on a plumeria .... Would this info be the same for the plumeria?
What beautiful back drops you have.
Thank you
How about lack of Iron causing leaves to turn yellow?
👍👍👍
Thanks for sharing. Can you please tell me what rose rosette virus does to roses. I have read so much info and I still am not certain how to identify the virus. Thanks
Hi Rossanna. I mad a quick video on it: czcams.com/video/hs9ccS1z30c/video.html The basics are a very pronounced discoloration and growth distortion, often quite local to one branch on your shrub.
Hi sir, good evening, I have a question? A few months ago we ordered button rose plants a dozen to be exact, 10 plants grew well up to this date but the other 2 had dried leaves and eventually dried stems. They were shipped in parcel boxes and each having it's own small soil ball wrapped in wet newspaper. My question is how do you care and water newly delivered roses from growers especially if there's a delay in shipment? Thank you!
Hi Raymund. 10 out of 12 isn't bad for roses that have been in a box too long. A quick rinse and soak is usually a good idea, and some light shade after planting will reduce stress.
@@FraserValleyRoseFarm Thank you very much, all 10 are well now and receiving full sunlight, still in small black plastic pots I am waiting for them to root well before fertilizing. One more question sir, I have bought so many hybrid teas, grafted, for many years and managed to over fertilize and kill them Everytime. I was wondering how do they get them to bloom big when they look like they were just newly planted in soil with carbonized rice hulls? Do they use foliar not granular fertilizers? Thank you for your time!
Hi Jason, been following your got a while now, and agreed and learn quite a lot from you. I've been watering my newly planted David Austin bare root roses daily since I planted them in the bottomless written planters au least 25 gallon size on 5/1/21, I'm in Ohio zone 6a. The climate has been mild this year so far, lots of rain and cooler temp. I noticed that some of the roses' leaves are really small and some even yellowing with the tips or edges of the leaves browning. Some people pointed out that I watered too much, is that true? It's bottomless though, shouldn't have drainage issues. Would like to hear the professional's thought on how often to water newly planted roses is sufficient, or any guideline? So far, I've been getting lots of flowers on other roses, which they got planted the same way, same sun, same soil, same watering schedule... Just some don't seem to grow as well or very slow∼they are the own root plants though. Is that true that own root grows slower than root stock plants? Would really appreciate your input on this. Thanks in advance!
Yes, I'd generally say that own-root roses of the same age will be smaller and slower growing than grafted roses. The problem with yellowing as a symptom is that it mean either thing: too much, or too little. It seems that your climate has been cool and moist, and you have them on a similar schedule as more established roses, so I don't suspect they're too dry. If they've been too wet, it will manifest as root rot. Water in a container can remain too moist even if it's bottomless - the plant may just be having difficulty using up all the water in a large container in its stage of growth. I'd probably back down the watering for a bit, but it's hard to say from here. Also just make sure that it's not overfertilization.
@@FraserValleyRoseFarm thank you Jason, I'll cut it down and will use a moisture meter before next watering. Thanks again
Jason, is over watering or too much water, especially in roses a reason that leaves turn yellow ?
Hi Enoc. It sure is one of the causes - too much water or poor drainage can make the plant susceptible to root rot. Poor roots = poor uptake of water and nutrients.
I always thought the yellowing was from bugs sucking the leaves... these bugs seem to be attracted to yellowing leaves. So...I have to wonder if nutrient deficiency is attracting the bugs?
A few of my chili plants ended up developing very thick leaves accompanied by “knots” at the junctions of the shoots. The growth of these plants stunted for the duration of the year but they were stubborn and didn’t drop their leaves. What could be the issue? Could it be over-fertilization?
I think you could be right with the overfertilization. I've overfed my tomatoes, and found the leaves went darker green, and the plant stayed super compact.
Hi Jason! Thank goodness I found your very helpful video. My entire potted roses leaves are light yellow and even bleaching almost white, new leaves came out with red color .. I admitted I put too
Much rose tone since beginning When Leaves are just light green I thought it needs more ferterlizer .. I keep add and add .. now all
Leaves are almost white, lime green.. What the best way to fix it? Is only way repot with new soil ? Thank you so much! Please help
Repot or rinse with water repeatedly.
@@FraserValleyRoseFarm Thanks so much!
I have a hydrangea with a few yellow leaves I was told it was short of iron so I brought sequested iron been giving them that is that right.many thanks.
It's pretty hard to know what specific nutrients are missing without soil testing. It could be iron - or just as easily be nitrogen or magnesium. If a dose of iron helps to green it up, that'll help to confirm the info.
Can you make video about perfect soil PH level for roses & how to adjust soil ph lvl if it too alkaline or acidic🙏
Sure thing
How do you determine this on shrubs already planted in the landscape? Dig around it to see if its dry?
Yes - a test hole nearby the plant will give you a good idea of soil moisture.
rootbound plants also shows get yellow leaves
Thanks!
Can you grow lavender roses in a pot about 12 inches or 1 feet and a half across? I came across a lavender rose that i like but it said it would grow to 2 feet to 4 feet, so not sure whether it will work with my container. I live in a condo, so can only grow them in containers and in my sunroom. Some of my rose leaves turned yellow, i think it is hard for me to pull the plant out of the porcelain container to check moisture, is there another way to check whether i have watered enough? Any guideline regarding how much water for a 12 inches porcelain container ( across) and 1 feet and a half ( across ) clay container? Do i water everyday? i suspect that i need to now because my plant leaves turning yellow and brown, the rosebuds also turning brown. Thanks
I don’t know anything about roses but I do know that I started using a water meter on a plant that was dying and it helped me realize that I was under watering by a lot. I just stuck it in the pot and left it there. Now I know to give it about 2cups of water every 3 days and don’t need the meter anymore. It’s a shamrock by the way. Hope this blesses you and that you are successful in figuring out the water situation.
One of my roses has pale yellow green stems. The other has regular planty green. The yellowed stems are growing shoots now so they are alive. Is this a normal response to cold or is something wrong with it?
I wouldn't be too worries: often the earliest shoots can be pale because iron is less available in cooler soil. Some varieties are also less pigmented than others. I usually begin to feed at this time of year, but don't go overboard. If soil temperature is the cause, it'll resolve as your climate warms up.
Hi Jason, what about if the yellow patches on the leaves on my rose shrub is kind of round and a little oval shape but kind of regular, and only on the leaves on one of the stems. Do you think that’s rose rosacea virus too?
At first impression rounded doesn't sound like mosaic, and I wonder if it's just quite local could it be a one-ff reaction to some sort of spray? I'd keep an eye on it.
Thank you Jason! I will do just that.
I recently planted a new organic rosemary in my garden, where a previous one died back due to damage over winter. The new rosemary has started developing yellowed leaves at the low base, only, though the rest of the plant looks healthy. I am trying to be careful not to over or under water it, to get it established. Is it a water issue, or a problem with the soil, maybe? I am in a zone 6, and both rosemary and the neighboring lavenders have been very happy in their garden bed, otherwise.
A little bit of yellowing or dropping of lower leaves shouldn't concern you too much. \It's pretty natural for the plant to favor the top growth in distributing nutrients and moisture.