Plant organ used for photosynthesis

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16
votes
3answers
11k views

What do purple tomato leaves mean?

Sometimes the leaves of the tomato seedlings we grow in pots gain a purplish shade on the bottom; the plants themselves (don't know if this is a coincidence) also seem to turn out stockier, shorter, ...
14
votes
4answers
10k 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 ...
13
votes
6answers
9k views

What can you do with oak leaves within a garden? Are they compostable?

We have a lot of oak trees on our property. Is there anything we can do with the oak leaves? They never really seem to break down, and because of that, I am afraid to try and add them to a compost. ...
12
votes
1answer
8k 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 ...
11
votes
2answers
2k views

How to treat a succulent with holes in its leaves?

I have a succulent plant that got some disease and is covered with holes. The holes started to appear a month ago. At first they were green (like something was eating it), probably growing and then ...
10
votes
2answers
7k views

Will leaving fallen leaves on the lawn during winter damage the grass?

I have a lot of leaves on my lawn (in Oklahoma). Will it hurt the grass if I leave the leaves there over the winter?
10
votes
2answers
3k 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 ...
10
votes
1answer
451 views

What is this anomalous growth on my oak leaf?

I found an interesting lesion on an oak leaf in my back yard (Upstate South Carolina). What is it? I am asking about the marble like structure since I am fairly certain that the larva (shown at link) ...
10
votes
1answer
3k views

How can I help a sunburned jade tree recover?

I put my jade tree out to get some sun yesterday, and apparently the sun was a little too blazingly direct. Instead of the healthy red edges I was expecting to see, several of the leaves are now ...
10
votes
1answer
621 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
4answers
10k views

Sudden Outbreak of Yellow Leaves on Tomato (and Other) Plants

My mother was in a panic this morning. She called me over to help her with her garden because many of her tomato plants had suddenly developed yellow leaves, many of which (but not all) also have ...
9
votes
3answers
6k views

What are those red dots on the leaf stems of my cherry trees?

While inspecting another problem I observed that most of the leaves are having two red dots (or very small bulbs, maybe cocoons) at the stems of their leaves: it is something harmful or even a pest? ...
9
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 and unfortunately the plant is now taking a turn for the worse and looking rather unhealthy. The leaves ...
9
votes
1answer
946 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 ...
9
votes
1answer
3k 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
540 views

What should I do with leaves skimmed out of a pool?

We moved into a house with a large in-ground pool, and have been learning to maintain it (I'm a yard-work newbie). We skim leaves and twigs out every few days, and some days there is rather a lot of ...
8
votes
2answers
828 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 ...
8
votes
1answer
2k views

Should you trim off half yellowed leaves on an indoor plant?

My mum has a plant (Aglaonema modestum) which she doesn't quite take care of, and it is messy with dead leaves and half yellow, half green leaves. I find them very ugly and want to trim them off. The ...
8
votes
2answers
121 views

Is my mint plant dying or diseased?

About a week ago I decided to propagate a healthy stalk of mint that I had bought from the grocery store. The roots appear to be healthy and full, but two of the leaves appear to be abnormal. One of ...
7
votes
6answers
479 views

Bonsai shedding leaves 1 week after purchase

I bought the below bonsai tree from Home Depot as a Xmas gift for a friend. I haven't even given the gift yet and the leaves are already starting to fall out en masse. I have the tree indoors in ...
7
votes
2answers
13k 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 ...
7
votes
1answer
872 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 ...
7
votes
2answers
2k views

A few leaves on my peppers are showing multiple small holes, should I be worried?

I've noticed that a small number of the leaves on my pepper plants are showing several tiny holes through their surface. These are focused towards the stem of the leaf, and not so much towards the ...
7
votes
1answer
3k views

Why are the leaves on my chilli plant turning 'silver'?

The leaves on my chilli plant have recently started turning silver, (as below), they also become thinner and have an 'elasticy' quality to them. Any idea what is causing this? Factors to consider: ...
7
votes
2answers
153 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 ...
7
votes
1answer
117 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, ...
7
votes
1answer
135 views

What is this large leaf by a river in Pennsylvania?

This plant is new to me. It's about 3 ft tall, in a well-shaded area on a river bank in Pennsylvania. It's rough to the touch and looks like a huge parsley-type leaf. I've lived in PA for about 16 ...
6
votes
5answers
5k views

Should I have added dead leaves directly to my garden?

With all the fallen leaves that were on our field I picked them up with my lawnmower with the pouch and them put that in my garden and worked the rototiller afterwards. I thought it would be good for ...
6
votes
2answers
216 views

Can I still use the mint leaves after the plant has flowered?

I have been gone a few weeks. Now my mint has all flowered. Can I still use the leaves? I want to make a batch of mint jelly.
6
votes
1answer
609 views

What should I do with a leaf that was almost torn in half?

I'm growing pepper plants on my window sills, and yesterday had a minor incident. While reaching over one of the plants in the bathroom, to close the window above it, my foot slipped and I caught ...
6
votes
2answers
90 views

How can I compost oak leaves and sawdust?

I have the enviable problem of having several (6 or 7) cubic yards of both oak leaves and oak sawdust from having logged off and making cabinet lumber from many oak trees that once grew where our ...
6
votes
1answer
1k 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
1answer
684 views

Identify this tree with two different types of leaves?

There are 2 types of leaves sprouting from the mystery root here. You might guess that one is a sprig of tree leaves and the other leaves belong to a weed, but in fact both are growing directly from ...
6
votes
1answer
5k views

What is causing curled leaves on different varieties of citrus?

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 ...
6
votes
1answer
70 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?
6
votes
1answer
2k 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 ...
6
votes
1answer
921 views

What is the best way to hide daffodil leaves after the flowers die?

I have an old flower bed in which the large daffodil clumps bloom spectacularly each spring, but after the flowers fade, the leaves grow some and last for a couple of months before they also die. ...
5
votes
3answers
1k 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 ...
5
votes
1answer
465 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 ...
5
votes
3answers
188 views

What's causing the edges of my blueberry leaves to burn?

Last year, this Sunshine Blueberry plant was doing stupendously - not a burned leaf in sight. Now most of the leaves appear like they're burning. Also, the fruit never mature to full size before ...
5
votes
2answers
645 views

How do I get rid of worm-like trails all over my Senetti plants' leaves?

I have had a Senetti (more info) for about 18 months, and last year it was attacked by aphids. Initially the leaves had a worm like discolouration, as if something was attacking or eating them. Are ...
5
votes
1answer
2k views

Leaves at the tip on new branches of my cherry-trees are wrinkled

On my cherry-trees I observed that the leaves of the tips of newly grown branches are wrinkled and inside there is something which simply said looks like black dirt. The leaves do not look damaged, ...
5
votes
3answers
619 views

What happened? - Chilli plants are developing spots on leaves and the edges are curling

I found some questions about other chilli plants, but I don't think the leaves look quite the same as mine, though it may be the same as the 2nd question posted. What is happening to my chilli plant? ...
5
votes
1answer
173 views

What's affecting this tomato plant? [duplicate]

Can anyone tell what's wrong with this tomato plant? Is it disease or deficiency? My areas been having issues with late blight the last few years. One spot seems to have a concentric circle around it ...
5
votes
1answer
677 views

Can I cover an evergreen shrub in winter?

I have a small evergreen shrub that gets frost burn in winter. I had been told to use tar paper on it over winter, but I was concerned that since it is a broad-leaved evergreen it might need light in ...
4
votes
3answers
6k views

What are some reasons why a blueberry bush's leaves turn yellow?

I have two types of Southern Highbush blueberry bushes, Misty and O'Neal. This spring, I noticed that their leaves are yellowing as shown in the photos below: Misty: O'Neal: They are in 100% peat ...
4
votes
3answers
78 views

Cucumber leaves turning white, dying, with yellowish powder

I have some cucumber plants (sorry, not sure which type), with a couple in a large, long pot, and one other in a small pot by itself. The plant in the small pot has a reasonably-sized cucumber, about ...
4
votes
1answer
313 views

Grapes leaves too dry - is that normal?

Recently I noticed my green grapes leaves don't look too good. There's nothing like scales or ants or any other sign of parasites. Only older leaves are affected, new ones are fine as you can see on ...
4
votes
1answer
91 views

Why is my Ficus loosing its leaves?

This spring I purchased an indoor tree and I think it is a ficus. It has recently, over the last month, lost many leaves, and does not look as good as before. It looks rather bald. Is there ...
4
votes
1answer
238 views

Does moss sprout leaves?

I had some moss in one of my seedlings pot and I asked what I should do with it here in GSE. I was assured it was mostly harmless so I left it be. However, a couple of days ago, it has sprouted ...