Plant organ used for photosynthesis

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6
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1answer
6k 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
28 views

Are the white sections on my bean plant's leaves caused by white flies?

I have been planting a few beans in my backyard, in a pot. The plants sprout well and start growing well. After a week or less the leaves have these white lines and patches on them. I had pepper ...
6
votes
2answers
52 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 ...
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 ...
5
votes
2answers
123 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 ...
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
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 ...
5
votes
2answers
70 views

Is powdery mildew spreading through my garden?

I noticed this white fungus a few weeks ago on some flowers in my garden which I ignored. But now it's appearing on my zucchini leaves. I was under the impression the fungi are plant specific, but ...
5
votes
2answers
717 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
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2answers
78 views

Should I remove tomato plant leaves to Increase yield?

Many garden websites recommended that you remove 50% of the tomato plant (Cordon Variety) leaves in order to increase the yield. It's my first time growing tomatoes, and I am growing Sweet Million, ...
5
votes
1answer
178 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
59 views

Why are my Japanese Yews (podocarpus) suddenly dying?

I installed five Japanese Yews (Podocarpus) in the fall, November, of last year here in Austin TX. I checked up on them about a month ago and everything was fine. Now the leaves are turning ...
5
votes
1answer
285 views

What are these red spots on my guava leaves?

I had purchased a guava tree (in vase) a month ago and from the beginning (some leaves had problems when I got the tree), some red spots or areas appeared on the leaves. After a while some of them ...
5
votes
1answer
74 views

What do I do with my avocado plant during arctic winter?

I am going to start with describing my plant and how it has grown and its living conditions, and then I'll ask my questions later. So I have this indoor avocado plant which I planted from a nut and it ...
5
votes
1answer
72 views

Why are the leaves on my capsicum plant curling and turning brown?

Does anyone have any idea what's happening to my capsicum plant and what I should do about it? There are no visible bugs on the leaves.
5
votes
1answer
77 views

What is causing yellow spots on my cucumber seedling's leaves?

I planted these cucumbers last week, and yesterday I noticed the leaves have yellow spots and edges. Do I need to buy new plants?
5
votes
1answer
112 views

How to check if a tropical tree has survived a subtropic winter?

I am currently living in the California Bay Area, a subtropic region. I grow quite a few tropical trees in my backyard. This winter has been the first subtropic winter that these trees have ever ...
5
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0answers
22 views

Why are some leaves on my tomato seedlings turning dark and falling off?

I am trying my hand at balcony tomatoes and sowed some in mid March. I already transplanted them once from the seed nursery to small drinking cups of about 200ml. Since they were bending too much ...
5
votes
0answers
23 views

needle-point size white spots all around the outer edge of Ficus leaves [closed]

Hello. I am writing from the San Fernando Valley, in Southern California where the temperatures vary from 48F at night to 85F during the day this time of the year. I have a 35 year old Ficus outside ...
4
votes
3answers
156 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
4answers
2k views

What is happening to the leaves of my Ipomoea (Morning glory)?

What could be the reason to cause this discoloration of the leaves? The discolored parts you see here get thicker over the time until the green color disappears. It does not seem that the leaves dry ...
4
votes
1answer
357 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
98 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
294 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 ...
4
votes
3answers
1k views

Why are the leaves of my Peace Lily wilted and black?

I recently bought a flowering house plant. I may have watered it too much, me thinks. Since my apartment gets little natural light, I put it outside on the patio the other day in direct sunlight, only ...
4
votes
1answer
918 views

White, fur like strands and spots on underside of chilli plant leaves

I am growing scotch bonnet, jalapeno and cayenne pepper plants indoors from seed. The scotch bonnet plants have what looks like white fur growing around the veins on the underside of their leaves. ...
4
votes
2answers
1k views

Why is my Australian Tree Fern's leaves curling up at the ends and looking kind of burnt?

I have an Australian Tree Fern and its leaves are starting to turn 'crispy' at the tips. One branch looks like it's been burnt almost. Can anyone tell me why?
4
votes
2answers
353 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 ...
4
votes
1answer
526 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?
4
votes
1answer
38 views

What is this white speck on the leaf of my plant?

I found these tiny white web-like spots on many leaves of my plant. What are these specks? And what should I do with them? Ignore them? Wash/Wipe them away with water? Pluck the infected leaves? ...
4
votes
1answer
129 views

Why are my blackberry leaves tasting like sulfur?

People don't always realise but you can eat a certain amount of blackberry leaves (and use them as herbs to make tea for diarrhea and stuff). The tea usually tastes and smells pretty good (kind of ...
4
votes
2answers
498 views

How do you manage dying leaves on young plants?

If a leaf on a plant is shriveling or yellowing, should you cut it off or leave it there? If you do the former, should you only snip off the damaged parts or should you cut off the entire leaf? My ...
4
votes
1answer
716 views

How to grow new leaves on rubber plant after they fall off

I have a rubber plant that lost quite few leaves shortly after we got it. We've got it back on track and are seeing some new chutes, but I'm wondering if there's a way to grow new leaves on the stems ...
4
votes
1answer
94 views

How can I get rid of these bugs on my African violets?

I had two pots of Saintpaulia (African Violet). They've been doing pretty well, lots of flowers, and breeding! However one of them has starting having bugs. When the blossoms open up, there are one or ...
4
votes
2answers
813 views

Why are the leaves of my ginger plant drying out?

It's only been 3-4 months since I potted my ginger plants. I water them every 2-3 days depending on the the weather. I try not to get the soil too moist. Over the last couple weeks, the leaves of one ...
4
votes
1answer
1k 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 ...
4
votes
1answer
97 views

Can anyone identify this plant, possibly a salad leaf?

I was given some seeds that I was told were pak choi. However the plants growing from these don't look anything like pak choi to me. It's possible the seeds got mixed up with other salad varieties ...
4
votes
2answers
130 views

What is this plant with leaves over a foot long, in Pennsylvania?

I found this plant growing on an overgrown hill slope full of wild plants and weeds in Pennsylvania. It looks like a Dock plant or a super large plantain leaf. I just collected a good amount of them, ...
4
votes
1answer
47 views

Jubilee blueberry's leaves are browning

I potted a Jubilee Blueberry plant 2 weeks ago. The leaves have started to brown this week. The same thing happened to my Spartan Blueberry plant. That one completely browned up and died. How do I ...
4
votes
1answer
66 views

Are these eggs on this Sugarcane Jujube leaf?

This is a leaf from a Sugarcane Jujube tree in Arizona. Are these eggs on the underside of this leaf? If so, what type of insect would they be from?
4
votes
1answer
207 views

What's wrong with my dwarf cherry tree's leaves?

I'm starting to see holes and some black spots on some leaves. Anyone know what this is and how I can treat this?
4
votes
1answer
742 views

Dry brown patches on cayenne chilli plant leaves, leaves starting to curl, tiny black spots

Note: I have posted a previous question regarding my chilli plants, its details may help in diagnosing this new issue. You can see it here: White, fur like strands and spots on underside of chilli ...
3
votes
1answer
194 views

What is this plant with red growths on its leaves?

This plant or tree is in front of my house. Can somebody identify this one. It is around five feet height with cherry like red growths on the leaves. Further to my question, I dissected this red ...
3
votes
2answers
92 views

What's this hole in the Cabbage leaf?

What's this hole I just discovered in the leaf of this otherwise very healthy Cabbage? I've got yellow insect cards nearby, and beneficial nematodes in the soil, which have collectively done wonders ...
3
votes
2answers
370 views

How do I find out & treat what is eating my hibiscus leaves

I was wondering what might be eating away at my hibiscus and how do I protect my poor little plant. I don't visually see any bugs on or under the leaves. Update: This plant is in a pot. Location: ...
3
votes
2answers
226 views

Leaf mold from oak leaves

In my yard I mainly have oak trees. I try to create leaf mold from them and was told that this can take longer than one year which seems to be the average duration for "other" leaves. What do I need ...
3
votes
2answers
260 views

What plant looks like a Peace Lily but has no flowers?

I've been helping my grandmother dig up a plant from her garden in North Carolina, and I'm trying to identify it. I've been looking at plant ID sites and the closest one in leaves is the Peace Lily, ...
3
votes
1answer
289 views

Which plant is this? “Dead ends,” pruning, watering tips

This plant has been in my possession since last summer (I moved into a new, and otherwise empty, apartment one year ago). I wanted to keep it, but because there are no labels, I decided to water it ...