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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Wounded rhipsalis hanging cacti

I need advice caring for my hanging cacti. I think it's rhipsalis lepismium bolivianum? It's started to develop black patches along its limbs. Also some weird spots. And some white muck gathering, which I guess is mealy bugs – I've just ordered some…
a1652
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What's wrong with my tamarind?

These four saplings are grown from seed around 6-10 months was growing perfect untill around 4 weeks ago I started to see a little bit of yellowing thinking its nothing untill now.
Joseph Wit
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Black Patches on Watermelon Peperomia

My Watermelon Peperomia that I purchased about 3 weeks ago keeps turning black! The leaves get cracks in them and then get these thin black areas that spread. There does not appear to be pests on the soil or leaves. I am watering sparingly, when…
Julia Fitzgerald
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My poor sick apple tree - what’s the mould?

This apple tree has this growth on many of its branches (say, 30%). It also hardly produces any fruit. How can I make this tree healthier?
nasty pasty
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Dying Peace Lily

I have a Peace Lily which has done well very a year in front of sliding doors. It has started drooping like it needed water to which I watered it and usually it perks right back up. It didn't this time and I thought maybe it got too cold in front of…
Kim
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how to best take care of a xanthosoma sagittifolium?

A few months ago I bought a big beautiful xanthosoma sagittifolium. I have it situated by a northern facing window because I read it does not like full sun. I'm very confused by this plant because it lost its big leaves a few weeks after I got it.…
KBula
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What is happening to my succulent and how can I cure it?

My wife got three different succulents from a friend for her birthday. One of them started turning brown on the stems and tips of leaves about a week ago. She's been watering them consistently (checked the soil this morning and it's damp), and it is…
The Spartan
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What is wrong with my jalapeño?

My jalapeño plant has been doing great so far, with no problems. It’s even growing two jalapeños. However, I’ve noticed recently on some of the newer flowers that after the flowers bloom, the stem turns yellow and eventually falls off. What is the…
user21998
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Who ate my rudbeckia flower leafs?

Somebody ate all my kale and now eating my rudbeckia leafs. It is a flower, not a veggie plant, but still seems to be tasty. Any ideas what/who it can be and how to deal with it, please. I am in Canada, north of Toronto area. No, I didn't check at…
Ella
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Brown and yellow spots on Calathea Orbifolia

I bought my orbifolia in january, and the brown and yellow spots on the big leafs were there when I bought it. But now (i think) the small baby leafs are turning yellow and brown, mostly on the tips but also in the middle of the leaf.. whats wrong?…
Cat
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Hollyhock with yellowing leaves

The leaves on my dwarf hollyhock are steadily turning yellow and falling off. It's new to the flower bed, gets 6+ hours of full sun/day, and has been sufficiently watered. Could this be a mineral deficiency?
user22049
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What pest is affecting my tomato plants?

This is the fourth year I've been growing tomatoes in my garden, but this is the first time I see this pest affecting my plants. The plants have black, brown spots on yellowing leaves. On some of the plants (see first two photos), the pest has…
Domi
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Leafs turn yellow on little lemon tree

I planted a lemon seed and I got a "tiny" lemon tree. I have it in very little soil so it doesn't grow too big but (surprisingly) it is in the same minuscule state for like a year now. I wasn't really worried about it since it looked healthy…
xpy
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Do i have maggots grow g in my plants?

I noticed a few days ago but the leaves on my spinach plant started to turn brown. I honestly thought maybe they were just getting too much sun or maybe the leaves had burned from being watered in the afternoon. I was in the Garden today we eating…
September Smith
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What is causing black leaves on my Aloe Vera plant?

This was a perfect plant. This started happening a week ago. All the leaves have gone from bright green to black. Some of the leaves are mushy. I water this plant once a month.
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