Questions tagged [diagnosis]

Gathering of information and facts to determine the root cause of a plant that is failing to thrive.

215 questions with no upvoted or accepted answers
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6
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0answers
135 views

What is wrong with my Hydrangeas

My hydrangeas were looking beautiful until a couple weeks ago. Then I started noticing that some of their leaves had these gray powdery looing spots on them, their blooms started having brown spots ...
6
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1answer
65 views

What’s wrong with my mango tree?

The mangos sometimes fall off, but most of them develop like a split right in the middle where it’s curved (dry, then it falls off). This did not happen last year. We water it 2-3 times a week, ...
6
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1answer
2k views

What is happening to our potato plants? (going black, wilting)

We have a row of 3 different heirloom potato varieties, 50 originally, of which we've lost about 15 to a problem we'd like to identify. The following photos show the start of the issue, through to a ...
5
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0answers
523 views

Birch trees with peeling bark and black area on trunks

I am wondering about my trees in our front yard. They seem to be peeling much more than others in the neighborhood and have black patches on the trunk. Any info on what I should do?
5
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0answers
312 views

Why is my Eureka lemon tree losing leaves?

I have an Eureka lemon tree that was doing great over the winter. I repotted it with Miracle grow soil and it has slowly started to drop the leaves and it has a couple brownish colored limbs. I again ...
5
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0answers
347 views

Dead branches and new growth on the same plant

I planted 5 Japanese Yews in the Spring and 3 of them have both dead/dying branches and new growth on the same plant. What would cause this? I live in North Texas. Thank you I believe they are ...
5
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0answers
561 views

What disease is affecting my Dypsis lutescens?

I received this Dypsis lutescens (palm) plant as a gift last spring, it had only two leaves and it was potted in nursery soil with sand. Recently I have noticed that the outer leaf started to form a ...
4
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0answers
35 views

What's wrong with my fairy castle cactus?

My cactus used to be really thick and dark green but now it's so much skinnier and starting to shrivel up. Some of the arms are turning a dusty kind of brown and they're all leaning away from the stem ...
4
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0answers
30 views

Could my courgettes have mosaic virus?

This was my first time (attempting) to grow courgettes. I used Cucurbita pepo Black Beauty seeds and all seemed ok to start with. I possibly planted them out too early (mid April) as had some ...
4
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1answer
83 views

What are these white things on new leaves?

I have roselle planted. But I see these on the leaves. What are these? Edit: Added closeups
4
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1answer
229 views

What to do for the young avocado plant with brown spots on its leaves?

I've read the answers to two similar questions but as the answers were opposing, i couldn't be sure what action to take. Here is what I have: Here (Figure 1) is my Avocado plant, which i had potted ...
4
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2answers
351 views

New growth on my schefflera is yellow

I have recently repotted my schefflera plant (it stopped growing due to how small the previous pot was) and it’s started growing again but all the new growth is yellow! The old leaves are perfectly ...
4
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0answers
783 views

Why are my tomato plant leaves turning brown, shriveling, dying?

This has been progressive over the last 6 weeks, leaves turning dry, brown and getting very thin and shriveling like paper on a Tomato "Blue Berries" cherry tomato plant. The closest I could guess ...
4
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0answers
770 views

What’s wrong with my wilting aloe Vera?

I’ve been trying not too water it too often or too little but it’s just looking sad. What do you think could be the cause of this and can it be saved?
4
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0answers
567 views

Dark spots on cactus?

My elderly relative has asked me to do a research on her cactus which has recently got these dark spots: I poked them and they are dry and hard when you touch them. There is no liquid or mush. They ...
4
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0answers
2k views

Why did my cilantro leaves get white and patchy?

I grow my cilantro on my kitchen counter with a grow light above. My cilantro starts out looking lush and green but quickly some leaves start getting white patches. It doesn't seem to kill my plant ...
4
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0answers
228 views

Why are my germinating mimosa pudicas dying?

I planted five Mimosa Pudica seeds in soil pellet. Three started growing, but two of them died after two weeks. Why, and how could I prevent this? I soaked the seeds in 30-35°C warm water before ...
4
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0answers
237 views

What disease is affecting this rosemary?

My rosemary has been looking like this since last summer. It's currently getting worse. New leafs (if it develops any) soon have these white little spots on it. What disease is this? Maybe false ...
4
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0answers
796 views

What are these barely visible white spots and brown edges on my citrus plant?

I have a citrus plant and something else growing in a pot. The something else had some barely visible white mold-like spots for a few months, and now its and the nearby citrus plant's leaves are ...
4
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0answers
55 views

Whats wrong with my Jasminum Sambac?

Why it's getting sick, and what can I do to prevent this? Is this damaging, like spreading to other plants?
4
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0answers
2k views

Why are my bean leaves curled with white splotches?

My beans received fertilizer occasionally in the spring to get them going, and now each plant has several beans growing. However, I noticed that many leaves are curled, deformed (like an old scar), or ...
3
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0answers
37 views

Golden Pothos Yellowing/Variegation? Possibly Mosaic Virus?

I am wondering if anyone can help me to understand if my Golden Pothos is getting improper care or if it has the mosaic virus. I have moved it to a location with less direct sunlight, but everything ...
3
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0answers
26 views

How can I get rid of my grub problem?

I have lots of yellow/brown spots on my lawn, and I think they are caused by grubs. I would like to know: How can I confirm that grubs are, in fact, the problem? What products are available to combat ...
3
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0answers
46 views

Evergreen shrub developed large dead area

What would cause this? Do I need to cut out this section? I don’t see any sign of insects. Our area is being infested with the spotted lantern fly.
3
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0answers
25 views

White branches on citrus tree, is this normal?

I'm seeing the branches to my citrus tree turn white. When I cut them, it's all dead. Is that normal or is it a fungus or something ? Please refer to the attached photo. It's happening to several ...
3
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0answers
24 views

NUBS falling off OKRA PLANT

I have healthy okra plants based on leaves and trunk observation, with small buds that are taking too long to blossom. They are planted in 5 liter pots. I found 1 flower that has dried up and fallen ...
3
votes
1answer
90 views

Young mango tree leaves get blackish and fall off

I have planted a mango seed and it was growing fine until a few days ago I noticed that one of the leaves had started going blackish. When I touched it, it fell. Yesterday I noticed that another one ...
3
votes
1answer
838 views

Why are my Monstera's leaves turning brown and drooping?

I just bought my plant last month, and recently the leaves have been getting brown spots on them and the leaves and stems are weak and drooping close to the ground. I kept it in the same pot I bought ...
3
votes
1answer
85 views

cherry tree leaf brown edge

I bought cordon apple trees and cherry trees 22 May, 2019. recently I start having problems. It was identified as apple scab and recommended Vitax Copper Mixture, which I spread on all the trees apple ...
3
votes
2answers
86 views

Why are my aloe’s leaves flattening?

In the past few weeks some of my aloe’s leaves are becoming flat. What is wrong with it? Is there anything I can do? .
3
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0answers
39 views

Buxus sempervirens - Deformed leaves

Can anyone help me? Suddenly my Buxus sempervirens appeared with the new shoots with deformed leaves. I'm in zone 9. It has not been cold though, and yes, it's a lot humidity every night.
3
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0answers
48 views

Why aren't my year-old apple seedlings thriving?

I planted a variety of seeds from apples from a local orchard. They have been growing for almost a year. They are about 8" and have suffered aphids and a white powdery fungus. I have sprayed plants ...
3
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0answers
231 views

What are these brown and white patches on my jelly bean succulent / sedum rubrotinctum?

I recently bought this jelly bean succulent but I didn't notice these brown and white spots. I really should've check the plant, but I just love succulents and I was too excited. Seems like the white ...
3
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0answers
264 views

Kalanchoe - thin leaves and white spots

This Kalanchoe has been losing leaves for a while now, the existing ones seem thin and white spots have appeared. I have repotted it recently and it has shown signs of improvement, but it still does ...
3
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0answers
640 views

Why are my potted outdoor Plumeria leaves turning yellow and brown?

All the leaves are yellow, with red around the edges and then eventually start turning brown?
3
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0answers
39 views

Pineapple leaf discoloration?

Can some tell me what’s going on with my plant? I have not done anything different and this started when we moved it inside.
3
votes
1answer
3k views

Kentia Palm's Outer Leaves Are Browning Quickly

I have bought a kentia palm about a year ago and I live in a warm and relatively humid climate. Some of the leaf tips have gone brown here and there in the past year, but I have noticed that the outer ...
3
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0answers
20 views

Magnolia not flowering well

My Magnolia ‘Vulcan’ flowers are not looking right. Attached photos are all new growth (in Australia, just entering Spring). Any thoughts as to the issue?
3
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0answers
76 views

Plum tree set fruit but now it's all gone

My plum tree - 4 years old but pruned incorrectly in 2nd year so was hoping for fruit this year - blossomed beautifully and tiny green fruits appeared. Now a few weeks later I can't see any fruit on ...
3
votes
0answers
1k views

What can I do to stop my Avocado from losing leaves?

My Avocado plant's leaves are all turning brown from the tips and a good amount has fallen off. The browning has been progressing throughout the winter (and maybe also before that). I usually water it ...
3
votes
0answers
686 views

How to revive a bonsai that was repotted after it was dying of overwatering?

I have a 15 year old Chinese Elm which I bought last year in April and keep indoors. It is placed next to a window, but due to british weather it doesn’t get very strong light. The bonsai survived ...
3
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0answers
750 views

What is wrong with my cactus? (Red spots)

Is it dying? There are these weird red marks, is this a fungal infection or sunburn?
3
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0answers
46 views

Blackberry Old Growth on Primocanes Dying

My row of Natchez blackberry is experiencing some mysterious die back. These are primocanes, the floricanes have been pruned out for some time. About 6 weeks ago the leaves begin to turn purple, then ...
3
votes
0answers
99 views

Are these roots healthy or bad?

Related: Tiny Yellow spots on Dracaena Reflexa Pleomele. What I am doing wrong? I am having trouble taking this plant out to examine the roots. I have used some technique to take it out but it is not ...
3
votes
0answers
504 views

What is this substance that looks like red sap on my cucumbers?

I have this weird red sap on a few of my cucumbers. I was wondering if anyone has seen this before? These cucumbers were grown in our conservatory in the back garden (facing south) in pots, grown up ...
3
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0answers
1k views

What can cause a Gasteria leaf to suddenly shrivel and turn greyish brown?

I have three succulent plants that I believe are Gasteria. One leaf in one plant has suddenly shrivelled and turned pale greyish brown. Sorry, no matter how I try, the colour in the picture is not ...
3
votes
0answers
282 views

Strange brown/dead spots on leaves?

What I have here is a plant which is being affected by something which is making certain spots of its leaves appear to be unhealthy. Does anyone have any idea what's going on? Is this something that ...
2
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1answer
24 views

My ivy leaves are turning hard with yellow to dark brown shade

My ivy leaves are turning a yellow shade then turning to a brown shade. The leaves also get a little more hard than usual. Place is Kashmir, India
2
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0answers
21 views

Can anyone help me identify the problem with my Areca Palm

I got this plant some 2 months ago from a local nursery and recently I noticed dark brown and yellow spots and now It started dying as you can see int the second image. I am watering it when the upper ...
2
votes
0answers
29 views

What's wrong with my cucumber?

brown water-soaked, and it starts from the top of cucumber leaves. I put them into a wet condition, but no symptoms of bacterial disease or fungal disease. Really need help

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