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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Spots on marigold leaves

I was sprouting some French marigolds and noticed some spots on the leaves. They didn't look good, especially since one of the plants didn't get them. I looked them out on the internet and figured it was some kind of leaf spot (though I don't know…
Jon
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What are the pigments in my orchid?

This orchid has been with me for one week. I don't know if she's ok, she has little points on her flowers and her stalk isn't brown at all. I watered the plant the same day I bought her and yesterday. She's in a garden with a ceiling but the sun…
Alejandra Lage
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Garden tree seems "sick"

I have multiple of these trees and one of them seems "sick" - it barely has any leaves and there is some discoloration on it. Is there anything I can do to treat it or do I basically have to rip it out and plant a new one?
Dandan
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What is causing curling and white, hairy growth on the leaves of my chili plants?

The leaves on my chili plants have started curling up, and on the underside of the leaves along the petiole, I've noticed a line of very fine white hairs. What's wrong with my plant?
Paul
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What is causing brown spots on my Philodendron?

I have dark brown spots appearing on my very large Philodendron and have no idea what is causing them. They are not turning yellow like the soil is too dry or they are getting too much sun. Does anyone have any ideas what might be causing this?
Dona Sullivan
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Why did my onion heads turn brown after planting?

My spring onion heads turned yellow. Once I set spring onions in the soil, the heads turned brown and they are growing slowly with yellow leaves. It's summer season in my country. My soil is a mix of clay and old cow manure. Why did this happen,…
user3142694
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My large pine tree is indenting at the bottom of the trunk

My large pine tree is starting to indent near the ground. The bark in some spots can be pulled off easily. The pine tree is the type that branches out. What could the issue be ?
Debra
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Why are my rose flowers getting dry?

First of all, I'm not a gardening expert so I don't know the correct terms. I bought some roses recently and I've put them next to my window. Their leaves are getting dry and their flowers are dropping, and I have used diazinon to kill the aphids (I…
Mahdi
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What are the white specks on my Strelitzia's leaves?

I have a white fungus on my Strelitzia. It started as little specks on the leaves and I would like to know what it is, what caused it and what will get rid of it.
rené baumann
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Browning and dying leaves on Lotus

Here is a picture of the brown leaves
Carlin
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My rubber fig plant has grown two new leaves recently but both have a mottled camouflage colour to them. It is otherwise healthy and usually great

It usually has shiny green leaves and grows very well in its home. It hasn’t been moved or had anything changed. It’s around 4 years old.
Sarah
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Black spots on gooseberry leaves

I have gooseberry/red currant plant (grafted). A some point black spots appeared on gooseberry leaves. They appear overnight on more mature leaves. Red currant leaves does not seem to be affected in any way. Do you know why is it happening and how I…
Michał Pająk
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Please help with watermelon

Can someone please help me tell me what’s the best soil and fertilizer for water melons? I have heard sand and all kinds of stuff to help my water melons get big. What am I doing wrong?
The Nerds
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Yellowing salvia greggii

I bought an autumn sage a few days ago, it had a few yellow leaves on the bottom but it seemed fine. However now there's yellowing and browning in the flowers too and a lot of the bottom leaves have fallen off. The plant came in a small pot and I've…
MakoShark
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On my ponytail palm next to the trunk newer leaves are brown. Ive benn peeling them off but its still growing brown leaves. What am i doing wrong?

The leaves in question is growing from top of trunk. They are coming out brown. I've peeled them off, but still producing brown leaves
Rhonda Small
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