For questions about a plant that's failing to thrive, and where the cause is unknown.

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5
votes
1answer
2k views

How can I protect my citrus tree leaves from being eaten?

A couple of years ago I planted a lemon and a lime tree in my garden. They've been growing quite well but recently I noticed the leaves are patchy and holey - something has been eating them. What's ...
6
votes
1answer
454 views

What are these brown patches on my acanthocereus tetragonus (fairy castle cactus)?

I've had this pair of fairy castle cacti for several years now, and they've done fairly well. However, I noticed today that they have developed brown patches over most of their stems and a few areas ...
1
vote
1answer
2k views

citrus, curled leaves

Is anyone able to identify this disease / pest? We have this on several citrus of different types including an orange, grapefruit, lime, and a mandarin orange. My first thought was that it could ...
1
vote
1answer
704 views

How can I make my Moringa Oleifera happy again?

I'm having some problems with my Moringa Oleifera. It's about 6 months old and is placed in a sunny window (oriented south), in southern Sweden. It's been growing well and looked healthy until ...
3
votes
2answers
5k views

Why do some of my zucchini shrivel and turn yellow at the blossom end?

Every year, I grow a zucchini plant, and every year a few of the zucchini stop growing once they reach a few inches in length, then turn yellow from the blossom end: Left to themselves, they will ...
2
votes
0answers
91 views

What's making holes in the trunk/stem of my succulent? [closed]

Something is making holes in the stem/trunk of my succulent, and is now making holes in an offshoot. When I stick my fingers in the dark hole, it feels gritty. I don't see any insects in the hole or ...
6
votes
2answers
1k views

Tomato plants got black stems and the leaves dry out

I was so proud of my tomato plants (grown from seeds), but now I'm worried that they have died... Instead of having a usual French summer (with 30 C at least and dry weather) it is raining a lot and ...
5
votes
1answer
449 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.
3
votes
1answer
171 views

Is it too late for this tomato?

I started these tomatoes on the soil and they were kind of crowded. I placed 2 of the largest ones in a separate container and they already have 2 tomatoes and lots of flowers, these where the others ...
2
votes
1answer
530 views

potted, indoor freesia: dropped flowers, yellowing leaves?

I bought a young (I'm guessing.. 6"-8" tall) Freesia about a week ago. It was doing well at the time of purchase, but it's been all downhill since. Within a few days, the flowers shrivelled then ...
5
votes
2answers
278 views

What is this disease on the growing tips of my peppers, and how can I control it?

Please have a look at these images of my hot pepper plant. Notice the growing tips which seem withered and diseased. What disease is this and what is causing this? What are the solutions to counter ...
3
votes
2answers
1k views

What causes my zucchini-leaves to become light yellow?

Please have a look at these images of my zucchini plant: What disease is this and what is causing this? What are the solutions to counter this? Location: India. Weather In May-June: Hot! > 95F ...
7
votes
1answer
717 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 ...
5
votes
1answer
387 views

Why are my lemons cracking?

My lemons are cracking as shown in below image: What can be causing this and how can I prevent this in the future? Location: India. Weather In May-June: Hot! > 95F days.
5
votes
1answer
662 views

White stuff on roots

When I uproot my vegetable plants or even sometimes when I remove weeds, I see this white stuff in the soil near the roots: http://imageshack.us/photo/my-images/717/img1014be.jpg ...
6
votes
1answer
606 views

Are my orange tree's yellowing leaves a sign of underwatering?

I have a mature orange tree in my back yard and I've noticed that the lower leaves at the extremity of have started to to yellow over the last couple of months. Is this a sign of overwatering? ...
3
votes
1answer
238 views

What is the white powdery substance on my Dracaena's leaves?

I bought a Dracaena about 3 months ago. I water it 1-2 times a week and make sure the soil is moist, but not too damp. About 3 weeks ago, it started developing a white powdery substance on the ...
5
votes
1answer
2k views

What is causing the bark on my crabapple to crack and peel off?

I have a flowering crabapple in my yard whose bark has several large areas where it cracks and curls away from the wood underneath: Hover over any image for description / click for full size I ...
6
votes
1answer
231 views

Basil: cold or disease?

A few days ago I put my basil outside. In a couple of days, the temperature fell considerably, and I think it got a shock, despite moving it back inside as soon as I could. I think this is the reason, ...
5
votes
1answer
275 views

Are large strawberries supposed to be fan-shaped?

My new Gurney's Whopper strawberries are growing large as advertised, but are an odd fan shape. Is this normal or am I doing something wrong? I have here a picture of Gurney's Whopper strawberries ...
6
votes
1answer
270 views

What is this mark that appears on my small green plums?

After the flowers fell the green plums started growing. As soon as they were 1/4" across, They began developing these little sunken black marks. I have been consistently spraying with fruit tree ...
4
votes
1answer
110 views

Perpetually unhealthy tree. Suggestions? [Pics]

I'd like some help figuring out what the cause of my unhealthy tree is in addition to suggestions on how to fix it. The tree is at least 3 years old; I've lived in the house 2 years and each year it ...
4
votes
1answer
257 views

What are these black spots on white splotches appearing on my tomato seedling?

Here are pictures of the infected leaves. I cut them off the plant as soon as I saw them today. Click for full size Here are close-ups of the most infected leaf: Click for full size What can ...
5
votes
1answer
271 views

Why are my eggplant seedlings not thriving?

I have started a bunch of seedlings and some are doing really well others are not, under similar conditions. I used 6-8 inch wide pots, ~6 inches tall, potting soil, and left the pots in front of a ...
6
votes
1answer
70 views

Is this a fungus?

I was doing my daily inspection of my plants I noticed this weird glob of stuff in the pot of one of my trees. I'm trying to figure out what exactly this is, because I've seen the same thing in ...
8
votes
2answers
2k views

Why is my pear tree dying around the blossoms?

Shortly after the blossoms fell on my pear, areas around the blossoms started to turn black and die. This is spreading. Although the dead areas tend to be on the end of the branches, there are ...
8
votes
1answer
1k 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
votes
11answers
10k views

How do I get rid of pill bugs in my vegetable garden (or is it even the problem)?

I have had multiple plants in my vegetable garden that have seemed to just vanish from the garden over the period of about a week. I have notice pill bugs eating the remains of the plants. They seem ...
8
votes
1answer
144 views

Jade: Can I repot and/or take cuttings?

I've read other questions on this and other forums on Jade plants, and haven't quite found an answer. My Jade plant is 20 years old and about 3" in diameter at the base and 4' high. It seems to never ...
6
votes
1answer
4k 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 ...
12
votes
3answers
7k views

How should a lemon tree with yellowing leaves, peeling bark, and small fruit be saved?

Our lovely lemon tree is in trouble... We live in Northern California. Starting mid-last summer our tree began yellowing. We've called an arborist out to the house but the advice has been pretty ...
4
votes
1answer
144 views

Why does my holiday cactus have a three cornered stem segment?

I noticed some new growth on my Schlumbergera, and when I looked at it, I found a three cornered stem segment. Is that a disease, a sign of nutrient deficiency, or a genetic defect?
6
votes
1answer
57 views

How do I control blight in lantanas?

All my Lantanas have this blight on their leaves. What is causing it and how can I cure it?
7
votes
2answers
557 views

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 ...
5
votes
3answers
1k views

Are woodlice eating my carrots?

I lifted some carrots this evening. It being December these are carrots which have been in the ground some time. They're big and fat, they need cleaning up and the damage needs cutting out, but ...
9
votes
1answer
136 views

Why are my persimmons black beneath the hull?

My mother's persimmon tree is producing fruit that tastes good, but the area at the top beneath the leaves (the hull/calyx) is black. The local nursery suggested the fruit may be getting too much ...
12
votes
1answer
456 views

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 ...
10
votes
2answers
2k views

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 ...
9
votes
1answer
1k views

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 ...
8
votes
2answers
4k views

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 ...
6
votes
3answers
11k views

Why has our lucky bamboo turned yellow?

Our lucky bamboo has turned yellow in a very short time, after we've had it for almost 2 years. We've trimmed all yellow leaves, and changed the pebble to clean the green algae - what else can be ...
6
votes
2answers
8k views

Why does my blueberry bush have brown/scorched leaves?

I recently purchased a dwarf Northsky blueberry bush from a mail order company. When I recieved it, roughly 15-20% of its leaves had the appearance of being burned or scorched; the bad leaves were ...
1
vote
1answer
407 views

My plants are dropping leaves suddenly and dying. Are they being poisoned?

We have got a Japanese maple plant in the back garden in a pot that has suddenly seemed to have died. There are absolutely no leaves on it at all now. I asked my dad who said this is perfectly ...
8
votes
1answer
2k views

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 ...
6
votes
2answers
674 views

Why are my basil seedlings failing to thrive?

I have grown basil from seeds in a large pot. They have germinated but are now failing to thrive. They are now about 3 weeks old. They get the afternoon sun and are watered daily. I applied Seasol ...
8
votes
2answers
501 views

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 ...
4
votes
2answers
281 views

What is causing a white rash to appear on the leaves of Pedilanthus tithymaloides?

My Lightning Bamboo Green (Pedilanthus tithymaloides, also called Euphorbia tithymaloides) feels well at my home; he already has a sprout. So I can't explain what the white rash on the leaves are. It ...
10
votes
3answers
5k views

Why does my lime tree drop its fruit early?

I have a kumquat and a Mexican (or Key) lime tree in pots right next to each other. The kumquat has been flowing and fruiting like a champ nearly as long as I've owned it. The lime hasn't yet ...
9
votes
1answer
394 views

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 ...
3
votes
1answer
282 views

Why did my grape hyacinths put out leaves in the fall?

Normally my grape hyacinth only puts out leaves in the spring, but this year they all are vigorously growing leaves in the fall. Why do they do that? Is it diagnostic of a problem?