Gardening and Landscaping Stack Exchange
Gardening and Landscaping Stack Exchange

Questions tagged [diagnosis]

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

For questions about a plant that's failing to thrive, and where the cause is unknown (it could be disease, pest, or environmental). Ideally, the fullest possible description of the symptoms and growing conditions should be included, as well as close-up pictures of the affected part and other parts of the plant.

Model Questions

These questions are good examples of how to ask an effective diagnosis question. Note the photos and descriptions as well as the descriptive title.

1428 questions
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Why are my Aglaonema's leaves turning yellow rapidly?

I have an Aglaonema (also commonly known as a Chinese Evergreen) at my desk at work. Over the past month or so, its leaves have been yellowing and dying rapidly. This is how it looked today, a Monday; last Thursday, I removed the dead and dying…
Niall C.
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Hard potatoes harvested

First time grower in Michigan, partial shade and probably not the best soil. The red potatoes I got out first were very hard. Why? What can I do to prevent this with the rest of them before they are harvested? Anything I can do for these dears?
tine laux
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Why do my gardenias turn yellow before they bloom?

My gardenias seem to be happy all year around, but when they bloom, they turn half yellow. Is there a way to keep them green through the bloom phase?
Sergey Aldoukhov
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cultivating a cactus from cutting

I've recently gotten a san pedro (Echinopsis pachanoi) cutting as a gift. I'm trying to take care of it as good as possible, but I'm not sure if I'm doing it the right way. The situation is: the cutting has been properly dried after cutting it, to…
user1745
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Second opinion: Arborist says tree needs to go

I just had an arborist look at a red maple with a long bark split in my yard. His diagnosis was that it was struck by lightning (there was a close lightning strike a few months ago) and the tree needs to come down. The tree is approx 40-50 ft tall…
Freiheit
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What's causing these yellow veins on my Okra leaves?

My Okra leaves have turned as shown below Is this a deficiency or a disease? How can I remedy this? Location: India. Weather In May-June: Hot! > 95F days. Current: Overcast with light rains.
gatul
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What is wrong with this peach/apricot?

There's a young tree in my in-laws garden, I'm 90% sure it's a peach/apricot. As you can see in the pictures, it doesn't look healthy. Can someone point me to what may be wrong with it? A couple of notes, this is in eastern/central Europe, temperate…
András Szilveszter
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Why is my avocado plant drooping and looking weak?

I have an avocado plant I started from a pit, it’s around 1.5 years old. Around a month ago we put it in a bigger pot, because it stopped growing and we thought it needed more space. In these last days though it doesn’t look good. Its leaves look…
Diana Monova
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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 completely wilted and near dead plant over the…
Lamar Latrell
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Sick Elderberry help

Recently I've seen my Elderberry trees develop some yellow leaves and I don't know what the problem could be or how to fix it, so I'll leave a picture if anybody can help me.
Juan Sebastian Rubiano Chona
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What is eating the leaves of my rubber plant?

They were fine few days ago, now these almost transparent patches exist on the leaves. I inspected the leaves, and there is no bug I can see. But they look like they got chewed by some small insect. What is this and how should I avoid…
4-K
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Zucchini leaves yellowing - but not powdery mildew

I have about 8 zucchini plants, about 6- 8 weeks along, which are starting to show signs of disease on the leaves. It's definitely not powdery mildew, but the end result is quite similar. Leaves are getting yellowish patches which then develops…
going
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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 podocarpus.
P. Butler
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Pinus sylvestris yellowing problem

I'm pretty new to gardening and I recently (~2 weeks ago) got a Pinus sylvestris 'Fastigiata' plant and I noticed that some needles started to yellow. Here are a few pics:- The yellowing is mostly on the internal and lower needles, but there is…
Milan
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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 mildew? What would be a good treatment for…
scho
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