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.

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Variegated Arboricola shrubs leaves wilting

What can I do to help this Variegated Arboricola to grow healthy and stop wilting? I am in Southern Florida. I was spraying my lawn with Ortho® Weed B Gon® Weed Killer For Lawns Ready-To-Spray2 which is near these plants. Prior to the…
Ryan Gates
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Why are the leaves on my houseplant turning yellow and getting black spots?

I have this shade plant in my home. The leaves are becoming dry, turning yellow and developing black dots on them. I don't know whats wrong with it. If it's a lack of food, I can give it compost, compost tea or kristalon. Can you please tell me…
user2120121
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How do I keep oak trees from sprouting?

I have a lot of nice sized oak trees. I have pin, black, and chestnut. Every once in a while one of them puts out sprouts all over the trunk and starts looking like a green pillar. How do I keep that from happening?
J. Musser
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Is this powdery mildew on my tomato?

Just noticed this on my store bought plant (not grown from seed). It's now fruiting, and I don't see any white spots on the leaves. Update: 25 Feb 2016 with close up of the stems and an more distant view of the plant health
Graham Chiu
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What is causing curled and deformed capsicum and chilli leaves?

I live in western South Australia (Mediterranean climate with sandy, pH neutral soils). I turned over the vegetable garden (history unknown) in August/September, adding Dynamic Lifter for vegetables, and planted in late September (spring). We then…
Fiona
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What is causing irregular brown sunken spots on my tomatoes?

I have been growing tomatoes in the same spot in my garden for years. This year most of my tomatoes seem to be affected by a disease which only affects the tomatoes. I prune, water & fertilize the plants regularly and they seem quite healthy…
laylarenee
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What are these red spots on the leaves of my boysenberry plant?

Previously, I had issues with the sun scorching the leaves of my berry plants. Now that the heat has cooled down, those leaves are back to normal. However, a lot of the leaves on my boysenberry plant have reddish spots on them, and I'm beginning to…
Lorem Ipsum
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What is this discolouration of the skin of my pepper?

One of my peppers is showing some strange discolouration of its skin. You cannot feel that it's there, so presumably this is underneath the outermost membrane of the fruit. As far as I can tell there is only one fruit effected so far. Here are two…
DMA57361
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My carrots that I dig from my garden are soft

I have been digging up carrots and have lots left in the ground. All of them are soft and spongy right out of the ground. I have been eating them for three weeks or so. They seem to be safe to eat. Did I just over-water them? Are they really safe to…
Michael
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Why does my sinningia have yellow spots?

Click below images to enlarge... This is probably Sinningia Ozark Coral Freckles. I put it in a aquarium with artificial light on from 8:00am to 0:00am. The distance to light is about 20cm. The young leaves were fine until they grew bigger and I…
lamwaiman1988
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What is causing dry, dark green spots on the leaves of my new basil plant?

I just bought a basil plant this past week at the supermarket to have some fresh basil for cooking. It had some dark green spots on it, which at first I assumed were just dry/dying leaves. I'm not so sure now though - I've been watering it…
tonysdg
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What's destroying my recently laid Kikuya lawn?

About a month ago I had roll on Kikuya lawn planted. Since then the area has had a lot of rain and irrigation and everything seemed to be going okay until recently when portions started thinning out. Below are pictures of what I mean. Here you can…
Arivian
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Are my Emerald Arborvitaes recoverable?

I bought 31 thujas a couple of months ago and some of them are really struggling. I installed a drip line a week ago, but am wondering if these trees are completely dead. Here are a bunch of pictures. Click on them to see larger views. Is…
Kirk Ouimet
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Why is my Swiss chard suddenly wilting?

I live in Brooklyn, New York, U.S.A. This Swiss Chard has been doing well so far this season, and all the largest leaves you see here were green and strong as recently as a few days ago. We had the hottest day of the season so far, a couple days…
Charney Kaye
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Why does my mint have dry, brown or black leaves and stems that are falling over?

What do I do for an indoor mint plant with dry leaves and stems which are falling over? Some leaves are brown or black.
user3480
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