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

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10
votes
3answers
3k views

Insect infestation on my pepper plant, what do I do?

I have spotted that one - and only one - of my peppers plants has a number of small black flies of some type hanging around the soil. And while writing this I've just spotted that one (and only one!) ...
11
votes
2answers
3k views

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. ...
9
votes
1answer
509 views

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 ...
13
votes
2answers
539 views

What are these cracks on the bottom sides of my tomatoes?

Recently I noticed the following cracks and small holes on the bottom side of my better boy tomoato plants. I am in Maryland and we have not had a lot of rain the past month however I regularly try ...
7
votes
2answers
537 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 ...
15
votes
1answer
477 views

How do I help my kitchen window herb garden thrive?

For the last couple of years, I've been nursing along a sort of kitchen window herb garden consisting of cilantro, parsley, basil and chives. What I've done is bought live herb plants at our local ...
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 ...
16
votes
1answer
5k views

Why has my mint plant gone all woody/sparse/stringy?

I grew my mint plant in a pot to contain the roots, and that has worked well for 3-4 months. However, the plant is not really producing fresh leaves now. Is there anything I can do?
16
votes
2answers
7k views

Why did my jalapeños turn black?

Last year I grew jalapeños. The fruits were tiny, but I was able to harvest a few handfuls. I noticed that many of them started to turn black on the plant. They were still edible, and they weren't ...
14
votes
1answer
4k views

What is my citrus deficiency, based on leaf appearance? And how to treat?

In the images of my citrus below, you can see the leaves are paling towards the edges. What is the deficiency and how can I fix it? The soil is clay-dominated with some sand and coloured red, ...
11
votes
3answers
4k views

Why does my cilantro have thin leaves? Why is my parsley not growing? When will they be ready for harvest?

My cilantro (planted outside, full sun from about 11am to 6pm) doesn't have the broad leaves that I see when I buy it in the store. I planted it in May. When should I expect it ready for harvesting? ...
9
votes
1answer
2k views

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 ...
8
votes
2answers
487 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 ...
8
votes
4answers
19k views

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 ...
7
votes
1answer
390 views

What could be causing rot to appear on the skin of my bell peppers?

I have a set of four bell pepper plants that I am growing in 12" containers in my backyard. They've been growing alright until the fruits on the plants have started to develop what appears to be a rot ...
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 ...
6
votes
1answer
3k 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 ...
3
votes
1answer
1k views

A visual reference to nutrient deficiencies in plants [closed]

Often times we cna look at the leaves of a plant to determine what nutrients are missing in the soil which the plants need. It would be nice to have a repository of images with accompanying ...
12
votes
4answers
7k views

Why is an indoor pepper plant flowering but not producing fruit?

One of my pepper plants has started to flower, and the petals are falling off to reveal a pepper growing from that stem - well, at least the first two have, and the other flowers seem to be bulging ...
11
votes
1answer
6k views

What does it mean if my tomato leaves are curling?

The leaves on my tomato plants are curling up and I'm wondering if they are getting enough water. The leaves are still green and there are tomatoes on the plant, but I didn't know if that was a sign ...
10
votes
1answer
834 views

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 - ...
9
votes
1answer
384 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 ...
9
votes
3answers
752 views

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 ...
9
votes
2answers
533 views

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 ...
8
votes
1answer
2k views

Why does my pepper plant have yellowing, drying and curling leaves?

One of my pepper plants has so far suffered from pests, blossom end rot and odd skin blemishes. Unfortunately, the plant is now taking a turn for the worse and looking rather unhealthy. The leaves ...
7
votes
2answers
2k views

How can I revive wilted water basil plants?

I bought these basil plants from the store. They looked a little droopy and wilting. They came with several bunches and they were half off and discounted because they've been there in the store so ...
6
votes
1answer
202 views

Why is my Swiss chard suddenly wilting?

I live in Brooklyn, New York, U.S.A. This Swiss Chard has been doing well so far this season, and all the largest leaves you see here were green and strong as recently as a few days ago. We had the ...
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 ...
6
votes
2answers
7k 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 ...
6
votes
1answer
423 views

Why does my sweet potato have stunted growth with wide, flattened stems and dense leaves?

My sweet potato plant has a severely widened and flattened stem and grows like a band, with dense leaves and stunted growth. What is wrong with it?
6
votes
1answer
885 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 ...
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 ...
5
votes
1answer
267 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 ...
3
votes
1answer
135 views

Why are the lower leaves of my tropical Guava yellowing and dropping?

I had a Century Guava (世紀芭樂) shipped over from Taiwan to zone 9 California. It is nearly 6 feet tall. I planted it in the biggest container that IKEA sold, 20 inches wide, 2 feet deep. I drilled many ...
2
votes
1answer
64 views

What could cause brown spots on the leaves of a Song of India plant (Dracaena reflexa)?

As you can see in these pictures our Song of India (Dracaena reflexa) is having some problems. I say it is too much water, while my wife says not. What do you say? Click any photo for full size
2
votes
1answer
69 views

Identify this Insect or Fungus. Possible Scale

I do not know the name of the plant and I have battled brown scales on my ficus before at my office. What is attacking this plant? Could it be some type of white scale? It is not mealybugs.
1
vote
1answer
81 views

What is wrong with this plant?

It has been like that for quite a while it looks like something upset her. What is wrong with it?