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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Why did my tulips die?

I planted three bulbs in a small vase, around 20 cm diameter, without a drainage hole. I planted them in November, outside under a roof, facing East, and watered them when the soil was dry. I'm in Amsterdam and the weather was cold, but not as cold…
Stefano Borini
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Chuck the plant - am I ill?

My name's Chuck, and I'm a plant. Bamboo tells me I'm a Sansevieria trifasciata laurentii, also known as "Mother in Law's Tongue" or "Snake Plant" (see other question here). I live indoor with my human flatmate. I think I may have some health…
Mena
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Why are my squash's leaves drooping?

This past growing season (2011) I was growing squash. Often I would find that the leaves had drooped (lost rigidity). Watering the plant seemed to help; but I'm not sure if there is a causal link there. The season was a particularly dry and hot…
Om Patange
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My basil had a shock after transplanting. What did I do wrong?

First a little backstory: I bought the basil at a supermarket, where it came in a small plastic vase. I kept it in this vase for three weeks. During these three weeks, I did the following: kept it at the window, with an additional timer lamp to…
Stefano Borini
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What causes spruce branches to drop their needles?

I have a spruce tree that has a problem. Every year, some branches suddenly drop all of their green needles and die. I would like to prevent this, but I don't know what the cause is. What causes this and how do I prevent it?
J. Musser
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Tillandsia (air plants) Turning Black and Dying After Watering

I am attending school in the northeastern US and have ten Tillandsias on the windowsill of my dorm room. I cannot collect rain water for them because I have no tools to do so, so the water I use to water them was the water from the drinking…
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Cherry sapling has orange dots on its leaves and the tips are wilting. What could be wrong?

I recently planted a cherry tree sapling about two weeks ago. It's about a handspan high, and has four leaves. I noticed that it had orange spots on one of the leaves when I planted it. Click on the images for larger size Today, I noticed tons…
ashes999
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What is this brown, shell-like thing growing on the stalk of my avocado plant?

Could you please help identifying this brown shell-like thing growing on the stalk of my avocado plant? There are several of these. It looks like a little shell (with the appearance of a woodlouse's back, but it's not that obviously) and it can be…
neydroydrec
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Why are the blooms dropping off my zucchini without fruiting?

As you can see from the pictures the blooms look as if they just release themselves and leave the beheaded stalk. There doesn't seem to be any fruit growing at all. Is there something that I am doing that could cause this? Is there something that I…
DiBobble
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How do I get rid of this white stuff on my pumpkin leaves?

The leaves on my pumpkin plants have what looks like a white mold growing on them. What is this? If it is harmful, how do I treat it?
Mongus Pong
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Tomato plant looks like it has grains of salt - what is it and how do I treat it?

My cherry tomato plant has been showing some yellowing of leaves over the past week or so. Just today I noticed the formation of these cluster of white granules - not sure if it's connected to the yellowing or not. It looks like grains of salt more…
Jonathan
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What is the problem/disease that causes bobbly peach tree leaves?

What is the likely cause of the bobbly forms on the leaves of a peach tree? Does it matter or is it just some natural anomaly that doesn't affect the tree's health? If is it a concern how can it be treated? The tree in question is about 1m (3 ft)…
Lisa
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Are the yellow leaves on my Massangeana due to root rot?

I bought my Massangeana (Dracaena fragens) 15 months ago, and he's be doing really well. Started off with a few burnt ends, but I switched to filtered water and he was good again. In the last couple of weeks I've noticed some leaves have suddenly…
Remy Sharp
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What is this bonsai tree with serrated elliptic leaves and why has it lost all its leaves?

My son bought me a bonsai tree for Father's day in June last year. It grew new leaves and shoots for a while and has been watered regularly. It has now dropped all its leaves and there does not seem to be any new growth. I would like to know how I…
Geoffrey James
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What are these blemishes on the skin of my bell peppers?

I've noticed the following on two of my oldest bell-peppers, also called capsicum (the third pepper of that "batch" had almost finished going red and ripening instead): It's not "on" the surface - I can't scrape it off - but it can be felt on the…
DMA57361
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