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 didn't my forsythia cuttings root?

In May, I took some greenwood forsythia cuttings, dipped them in a hormone rooting powder and planted them in rooting mix. The mix was kept moist all year. I had thought they had rooted because they began to grow rapidly and the new shoots hardened…
J. Musser
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Why isn't my lemon tree growing?

We planted a lemon tree five and a half years ago. Today it's about the exact same size as ever. I've tried using citrus fertilizer, but to no avail. We've had dry summers and wet summers, but nothing changes. I'm in Melbourne, Australia What's…
Rick Measham
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Strawberry plants brown & brittle - is it disease, climate conditions, or bugs?

Most of my strawberry plants have leaves that first turned red, then brown and brittle. Leaves often snap off when harvesting what berries remain after the critters get them. I'm trying to balance watering - I've been holding off a bit more on the…
Chuck
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My indoor plant has an orange mold-like substance growing on it and has tiny white bugs. How can I remove it?

I have my very first plant in my cube and it seems to be doing just fine. However, there is an orange mold-like substance growing on the top of the soil, and I can see a few tiny white bugs crawling around in the soil. Did I do something wrong? …
jjnguy
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How to stop my courgettes (zucchini) rotting?

I've tried growing courgettes (zucchini) for the first time this year and the plants have been delightfully easy to grow. (For reference, I'm in NE England, UK, btw.) However, many of the fruits rarely get thicker than my index finger before…
Mal Ross
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Is my Schefflera arboricola getting the right amount of light and water?

I have a Schefflera arboricola (also known as Strahlenaralie in German). I've placed it in my office so that it receives some sunshine, but not directly - I've put it behind a plastic plant (on the right on the photo). The blinds are often closed in…
axel22
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What's causing my potatoes to wilt?

I'm growing yukon gold potatoes. They've been growing like gangbusters, but this week I noticed some leaf yellowing and wilt on at least 3 plants out of 9. Why are they yellowing? Is it anything to be concerned about? I check the soil daily, and…
Caffeine Coma
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Why are there kinks in my aloe vera leaves?

On several of my aloe vera plants, the leaves suddenly became kinked. The leaf would get very thin in a spot and bend over. It starts near the tip and is most noticeable on older leaves. What is causing this? It happens inside more often than out,…
J. Musser
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Why are my peach leaves turning orange?

During summer, the leaves on my peach tree turn an orange-green shade. Is this normal? Is this a response to heat stress, drought, or something else (e.g. mineral deficiency during high heat conditions). The color change is almost as if it was…
winwaed
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How do I encourage morning glories to bloom?

I know that many of you will find this unbelievable -- but my morning glories did not bloom this year. For those of you that live where morning glories are a perenial that borders on "weed" this might sound amazing -- but I live in a colder…
Joseph Barisonzi
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Why have my tomato leaves started yellowing at the base?

One of my tomato plants (Better Boys if that matters) has a few leaves that have started yellowing on the lower branches. Not sure if they aren't getting enough water, or if they are diseased or what. What is causing this? If it's a disease how can…
wax eagle
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What is causing this damage on my apple tree?

UPDATE On inspecting all the other branches, I found one of the branches in the following state. It shows the bark beginning to fall off the tip, explaining how the other branches have developed.I cut it off, sealed it in a box and put it in the…
Nic
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How do I prevent my berry leaves from getting scorched in the sun?

Raspberries are plants that require good exposure to sun. However, my black-raspberry plant has been getting scorched of late. Typical signs of sun-scorching are when the older leaves start drying out (see photo), turning brown and papery (crumbles…
anon
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What can cause the leaves of a rose bush to turn black and fall off?

I bought a small rose bush on Mother's Day this year and planted it in my flower garden. The area probably has too much shade for a full sun plant, but I don't think that is the issue here. Shortly after planting, its leaves began to develop black…
wax eagle
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Why are my pumpkins dying? Is it the heat?

I'm getting plenty of flowers, and about half of them produce a tiny little pumpkin. However, after only a couple of days, the pumpkins begin to turn black and shrivel up. It is 104-degrees during the day with medium humidity. I have been providing…
Brian Webster
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