Questions tagged [diagnosis]

Gathering of information and facts to determine the root cause of a plant that is failing to thrive.

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1answer
10k views

Why are my carrots white in the center?

We harvested all of the remaining carrots in our garden, and to our surprise a large number of them are white or bright yellow in the center, rather than being orange all the way through. The white ...
9
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1answer
416 views

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 ...
9
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2answers
21k views

Why is my cactus droopy?

I have a cactus (pictured) which I bought about a month or so ago. It has been slowly drooping, although the tag said to keep it dry in winter and I have only watered it once when I re-potted it. The ...
9
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1answer
2k views

What is causing diseased leaves on my French beans?

My French bean plants have diseased leaves as shown below: What can be causing this? The beans themselves are relatively plentiful. Location: India. Weather In May-June: Hot! > 95F days. The bottom ...
9
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1answer
5k views

Why are the tops of my Brussels Sprouts turning purple?

What does it mean when the tops of the Brussels Sprouts start to turn purple?
9
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3answers
9k views

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, ...
9
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2answers
1k views

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 ...
9
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1answer
1k views

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 ...
9
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2answers
20k views

Why are the leaves on my mango tree turning brown and drying out?

I grew a mango tree last summer from seed in a pot. In the beginning it was extremely healthy looking and fast-growing. When the summer was over, as it gets very cold here in Canada, I took it indoors ...
9
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1answer
405 views

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. ...
9
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1answer
113 views

Cycad - Zamia fischeri - large chunk from caudex

Advice please on what may have caused this large chunk to be taken from my specimen of Zamia fischeri? Background The plant was purchased about six months ago and I recently (three or four weeks ...
8
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4answers
784 views

Why do the leaves of my (very young) Eureka lemon tree look folded?

(Edited to add more detail and an update at the end) I have a small Eureka lemon tree that is few months old, and is currently showing signs of weakness that are worrying me. In more detail, some ...
8
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1answer
5k views

Should I be concerned about these purple stems and dead leaves?

I have a small mint plant that a friend grew from a cutting and gave me. He had it in a tiny pot, so I transferred it to another pot in pretty short order, and it's certainly been growing. I have not ...
8
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2answers
2k views

What is this house plant with bright pink flowers and dark green leaves? How should I take care of it?

I bought this plant from a home repair store 3 days back, but I don't know what it is. Now it seems that its decaying. What is this plant and what do I need to do to take care of it?
8
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2answers
15k views

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 ...
8
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2answers
3k views

Why are the leaves of my basil yellowing and falling off?

I got this basil from a friend when it was about half this size. It was a bit spindly and looked like it wasn't pruned enough. Since then I cut it regularly and it got some branches and the base even ...
8
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1answer
3k views

Who/what is eating my mint?

Who/what is eating my mint? What should I do about it? Can I do something organic? I had destroyed my mint a year ago by spraying a pesticide, so I don't want to go that route. I live in Jaipur, ...
8
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2answers
4k views

What is causing the leaves to develop brownish patches between the veins on my tomato plant?

My tomato plant's leaves are turning brown in some places (photo). Zoom in It seems to affect mostly older leaves, but not all of them, as you can see in the image. It starts with a few small brown ...
8
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2answers
25k views

Why are my lilacs dying and what can I do about it?

I have some large, old lilacs that seem to be dying. They start out great in the season, then leaves on individual branches start to get a variegated look, then curl, then brown, then finally die. I ...
8
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2answers
3k views

Why is my hosta shrinking?

I have a blue giant hosta. It is in fertile soil and gets plenty of water. I had been dividing it every few years but lately it has started to shrink. I don't want to lose it. How can I get it back? ...
8
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1answer
1k views

Why is my Dwarf Jade plant dropping more than dozens of leaves?

My Dwarf Jade plant has been dropping dozens of leaves (both good and bad leaves) every day for the past few days. It receives bright indirect light. What is the case? Is it overwatering or ...
8
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3answers
4k views

What is this dead light brown patch on my lawn, and how do I get rid of it?

I have a speckled, dry brown patch on my lawn that won't go away: I first noticed it a month or so ago while mowing the lawn, when it was isolated to a single area of several square feet. I figured ...
8
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1answer
5k views

Why won't my mulberry tree set fruit?

I have a mulberry tree which has been in my garden for 4 years. I bought it at a market and I think it was a seedling. It has grown to a height of 4 metres and is thriving. Each year it has flowered ...
8
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1answer
893 views

How can I prevent my banana tree from drying out?

We live in Lahore , Pakistan where temperature in summers reach 45 degrees Centigrade. Our banana tree is drying out in the sun. What is the best way to ensure that it remains healthy? This banana ...
8
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1answer
2k views

Why do my gardenias turn yellow before they bloom?

My gardenias seem to be happy all year around, but when they bloom, they turn half yellow. Is there a way to keep them green through the bloom phase?
8
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1answer
2k views

What or who is causing these small poop-like balls of soil below the pot?

What is this poop-like sand doing in my pot saucer/tray? I saw them today. I lifted the pot(Dracaena Reflexa [Song of India]) and couldn't find a bug or anything. So I thought maybe it's the sand ...
8
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2answers
326 views

cultivating a cactus from cutting

I've recently gotten a san pedro (Echinopsis pachanoi) cutting as a gift. I'm trying to take care of it as good as possible, but I'm not sure if I'm doing it the right way. The situation is: the ...
8
votes
1answer
8k views

Zucchini leaves yellowing - but not powdery mildew

I have about 8 zucchini plants, about 6- 8 weeks along, which are starting to show signs of disease on the leaves. It's definitely not powdery mildew, but the end result is quite similar. Leaves are ...
8
votes
1answer
427 views

Does my mint plant have web blight?

In the pot I see small lumps that look like rocks, but they crush like dirt. Additionally, there's fuzz on the main stem that looks like a spider's web. Finally (what a brown thumb I've got) there's ...
8
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2answers
2k views

What's causing these yellow veins on my Okra leaves?

My Okra leaves have turned as shown below Is this a deficiency or a disease? How can I remedy this? Location: India. Weather In May-June: Hot! > 95F days. Current: Overcast with light rains.
8
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1answer
4k views

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 ...
8
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1answer
514 views

What's this black spot on my gasteraloe?

I have another question about this plant. I noticed a large black area at the base, surrounded by little black spots. When touching this area it seems normal, it's just turned black. So my guess is ...
8
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1answer
2k views

Translucent spots on leaves

Recently, several of my plants have developed these translucent spots on their leaves: What is causing this? What should I do?
8
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1answer
490 views

What is eating the leaves of my rubber plant?

They were fine few days ago, now these almost transparent patches exist on the leaves. I inspected the leaves, and there is no bug I can see. But they look like they got chewed by some small insect. ...
8
votes
1answer
1k views

What are the white spots and holes in the leaves of my Western Indian Lime Tree?

Do you have any ideas about why my there are white spots and holes in the leaves of my Lime Tree? What might the pest be and how can I rectify this? Any products you recommend? I live in Melbourne and ...
8
votes
1answer
863 views

Why is my cactus turning purple and pale?

Ever since I got this cactus it has been growing, but now it's becoming purple and paler. What am I doing wrong, and how do I solve it? I'm rather new at this gardening stuff so help would really be ...
8
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1answer
125 views

Sick Elderberry help

Recently I've seen my Elderberry trees develop some yellow leaves and I don't know what the problem could be or how to fix it, so I'll leave a picture if anybody can help me.
8
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1answer
252 views

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 ...
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0answers
102 views

Why does my banana chili start to wilt and seem to die off when it reaches 500 mm high? [closed]

You can see the problem in the picture! I've grown chilies here for 25 years without problems.
7
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2answers
451 views

Does my very young Eureka lemon tree have leaf disease?

I have had a small sprout of lemon tree (Eureka lemon, if I trust the label) for a few months, and for the past two it has been looking weak and sick. In particular, it's not making new leaves (...
7
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2answers
3k views

How can I help my young mulberry tree grow a thicker stem?

I have my young mulberry tree, which is a little more than a year old. I grew it from a seed, and have it indoors in a large pot at the moment. It is growing tall and thin, it even needs a stick to ...
7
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4answers
549 views

Second opinion: Arborist says tree needs to go

I just had an arborist look at a red maple with a long bark split in my yard. His diagnosis was that it was struck by lightning (there was a close lightning strike a few months ago) and the tree needs ...
7
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3answers
3k views

Cherry sapling has wilted leaves, dried trunk; is it dying?

I've posted earlier about my diseased cherry seedling. Since then, all the leaves have wilted and curled to some amount and the trunk of the seedling itself looks like a dried stick. Is this tree ...
7
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4answers
37k views

How do I keep “cat grass” alive?

Sometimes I buy a little carton of grass at the pet store for my (indoor) cat to nibble on. She likes it but it always seems to die off within a week or two. I'd really love to have a sustainable ...
7
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6answers
5k views

Are my tomato plants damaged by a chemical or a disease?

Most of my tomato plants have started showing signs of what I think is Cucumber Mosaic Virus. I have shoestring, fernleaf, and curling leaves. They also have a leathery appearance. At first I thought ...
7
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2answers
320 views

Found on a Red Cedar. What is it?

We were walking around on our land a few weeks ago and saw these things on some Cedar trees. Never seen them before. Is it a bug in there or something else? We are in Northern KY. This thing was hard, ...
7
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1answer
3k views

Why is the foliage turning yellow on this climbing indoor vine?

I've had this plant in water until it grew enough roots and a few more leaves. I'm not sure what kind of plant this is, but its starting to grow longer; when it was only one little leaf when I rescued ...
7
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2answers
83k views

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.
7
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3answers
8k views

How to tell if mint plant is dead

My plant looks like this. Is it alive or dead ? I have not tried to do anything yet as I'm not sure I will be doing the right thing.
7
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4answers
1k views

How can I revitalize cucumber plants after spraying them for mildew?

I have three cucumber plants planted on my balcony. The plants started great and went on growing. What looked like a promising start is looking like a disappointing end. It started with white ...

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