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1,869 questions with no upvoted or accepted answers
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9
votes
4answers
18k views

What is this 3cm green caterpillar from northern California?

We have a number of these caterpillars in the yard. They are about 3 cm long. This is on the peninsula south of San Francisco, CA, USA. I initially thought of geometer moths but it seems to have ...
8
votes
1answer
388 views

Tree identification

Can anyone say with certainty what this species of tree this is, found in Northern Michigan? The pic was taken today. Thank you in advance.
7
votes
1answer
165 views

Identify tree with gray ridged bark and large cordate leaves

The leaves are big and the stem is thin
7
votes
1answer
305 views

Pinus sylvestris yellowing problem

I'm pretty new to gardening and I recently (~2 weeks ago) got a Pinus sylvestris 'Fastigiata' plant and I noticed that some needles started to yellow. Here are a few pics:- The yellowing is mostly on ...
7
votes
2answers
1k views

How to get rid of mynah birds?

Mynah birds have taken over my garden, displacing the natural avian fauna. I would like to get rid of them, but my being in Australia means that I can't buy a gun. Any alternative suggestions on how ...
6
votes
1answer
55 views

Chilli Plant Leave Tips

My chilli plant is growing however the tips of the leaves are drying, any suggestions ? Is this normal ?
6
votes
1answer
328 views

Kentia Palm problem

My leave and stalk of my Kentia Palm has few problem Please help !
6
votes
0answers
263 views

Cactus shoots drooping and turning olive

Hey Gardening & Landscaping SE, happy to be a new member! I am concerned for my cactus shoots and hope you are willing to help me out. Short version: My 3,5 months old cactus shoots are starting ...
6
votes
0answers
108 views

Identifying/operating an automatic watering system

I recently bought a house built circa 1970 in France, and it came with an automatic watering system (date of setup unknown, so any time between then and now), controlled by this: I've been unable to ...
6
votes
2answers
7k views

White and brown spots on cacti

I've been away for the last two and a half weeks, and upon return I noticed a few of my cacti had developed white fuzzy spots, which were not there before. In the worst instance, one cactus appears ...
6
votes
1answer
182 views

What are these white with black caterpillars eating Petunias in Albuquerque, New Mexico?

I'm visiting grandparents in Albuquerque, New Mexico and am trying to help perk up some of their potted and hanging potted plants. It doesn't take long for plants to dwindle in this area (dry and hot ...
6
votes
2answers
359 views

Browning arborvitaes — why?

I have about 20 arborvitae trees along my driveway and all are browning. I'm a new homeowner and do not know the trees' history. What sort of issue do the below pictures exhibit? Thanks. I am in Long ...
6
votes
0answers
112 views

Is the Atherton Raspberry known to hybridize with other Rubus species?

Is Rubus probus (the Atherton Raspberry) known to hybridize with other Rubus species? It sounds like it would be pretty awesome in breeding programs.
6
votes
0answers
185 views

What are these fragile green plants with small yellow blooms in Santa Fe?

We are having cold Winter temperatures below 10 °F at night and I find a thick patch of these fragile green plants, some with small yellow blooms, all in a part of the yard that we do not water. ...
6
votes
1answer
317 views

What caused this red spot on my Haworthia plant?

My Haworthia plant has this strange red spot. I'm not sure what it is - is my plant okay?
6
votes
0answers
341 views

Are these primary or secondary verbena pests?

I posted before about the powdery mildew affecting my verbena plants. I have now observed that some leaves have died, and small (1 mm or less) insects are present. They're mobile so not eggs, white ...
6
votes
0answers
999 views

What is this plant with serrated narrow leaves?

I left my fern outside like I do every year. When its leaves fell off this year, an odd plant was growing in with it. Does any one know what this plant is?
6
votes
0answers
74 views

Realtime landscape plus design program, final ground height

I have Realtime Landscaping Plus 3D landscape design program and I cannot find any way to see what the the final height of the ground is in my design. The design has lots of slopes, height grids, ...
6
votes
0answers
805 views

Bermuda grass (I think?) is a muddy mess in the winter time

I live in Knoxville, TN. My back lawn sees a lot of action year-round with two medium-sized dogs. I think much of it is Bermuda grass, since it runs close to the ground, is very thick and soft in ...
6
votes
1answer
161 views

What plant/gems are these?

What gems/plant is this? I picked up this branch in a forest past winter. The white gems(?) are still intanct after three month, without water provisioning. Location: northern Italy. Here is another ...
5
votes
0answers
41 views

Cucumber disease/ pest identification

Can anyone tell me what is happening with this cucumber plant?
5
votes
1answer
51 views

Root Bound Cucumber Transplants

I just purchased cucumber seedlings that I had called the greenhouse ahead about. When I got there I realized that the cell pack of cucumbers were extremely root bound. Knowing that cucumbers are ...
5
votes
2answers
446 views

~1 Year old Avocado tree drooping leaves after repotting

Hi recently I decided to move my avocado tree to a different pot because it suddenly stopped growing new leaves and the leaf tips had started to brown a bit. I believe I had watered a little too much ...
5
votes
0answers
131 views

What is wrong with my Hydrangeas

My hydrangeas were looking beautiful until a couple weeks ago. Then I started noticing that some of their leaves had these gray powdery looing spots on them, their blooms started having brown spots ...
5
votes
2answers
71 views

Plant/tree name?

I bought what was supposed to be breadfruit seeds. Only one seed grew. I don’t believe this is a breadfruit tree based on leaf shape and texture. Anyone have an idea?
5
votes
2answers
87 views

What is wrong with my plant? and why is it turning yellow?

For some reason, my plant started turning yellow. At first, I thought maybe I'm over watering it, because I was watering once a week. Then I stopped watering for three weeks, and even though there are ...
5
votes
1answer
665 views

Why is the bottom of my cactus discolored and soft?

I got this cactus a couple of years ago but in the last few months I have noticed the bottom half getting brownish and soft. I water the cactus about once every 6-8 days and it gets a lot of direct ...
5
votes
0answers
94 views

Handling a Cherimoya Tree

Does anyone have any experience with Cherimoya Trees??? We have one in our backyard. Last year, it produced some decent size fruit. This year, it seems like there are more fruits sprouting, and the ...
5
votes
0answers
62 views

Red Plant Growing in a Brick

This Is growing in a brick in my backyard. Im Not Sure What It Is. Does someone Have An Idea? Is Shaped Like A Small Chinese Tree.
5
votes
1answer
513 views

Potato vines dying

Anyone know about potato vines? Planted one this past spring. Was thriving. Nice green leaves and beautiful blooms. Grew like a weed. All of the sudden it is dying. Can’t figure out what’s going on. ...
5
votes
1answer
1k views

Why is my avocado plant dying with brown, decaying leaves?

A few years ago I grew an avacado plant from some seed and some time later leaves started turning brown and fell from the plant. I tried a lot, but landed on the thought that perhaps since it has ...
5
votes
0answers
512 views

Birch trees with peeling bark and black area on trunks

I am wondering about my trees in our front yard. They seem to be peeling much more than others in the neighborhood and have black patches on the trunk. Any info on what I should do?
5
votes
1answer
35 views

Starting shallot advice

OK, I have been attempting to get a shallot bed going the last couple years. I chose to go with seeds, but really have had little luck. If I start inside I have had little luck transplanting. I may ...
5
votes
0answers
305 views

Why is my Eureka lemon tree losing leaves?

I have an Eureka lemon tree that was doing great over the winter. I repotted it with Miracle grow soil and it has slowly started to drop the leaves and it has a couple brownish colored limbs. I again ...
5
votes
0answers
339 views

Dead branches and new growth on the same plant

I planted 5 Japanese Yews in the Spring and 3 of them have both dead/dying branches and new growth on the same plant. What would cause this? I live in North Texas. Thank you I believe they are ...
5
votes
0answers
545 views

What disease is affecting my Dypsis lutescens?

I received this Dypsis lutescens (palm) plant as a gift last spring, it had only two leaves and it was potted in nursery soil with sand. Recently I have noticed that the outer leaf started to form a ...
5
votes
0answers
227 views

Need help identifying a new plant/weed? in my garden

this appeared under Norway maple, but nowhere else in my yard. Can't find it on the Internet (yet). Deer/something ate it at first but stopped. I've added a picture of the stem. I think the other ...
5
votes
1answer
63 views

What’s wrong with my mango tree?

The mangos sometimes fall off, but most of them develop like a split right in the middle where it’s curved (dry, then it falls off). This did not happen last year. We water it 2-3 times a week, ...
5
votes
1answer
2k views

What is happening to our potato plants? (going black, wilting)

We have a row of 3 different heirloom potato varieties, 50 originally, of which we've lost about 15 to a problem we'd like to identify. The following photos show the start of the issue, through to a ...
5
votes
1answer
121 views

What is wrong with my Cherry blossom tree?

My cherry blossom tree's trunk is not looking very healthy and the leaves at the top are being eaten :(
5
votes
1answer
116 views

What is the powdery mildew and why are my cucumbers not growing beyond 1 inch?

I have a healthy cucumber plant to all appearances. There is some powdery mildew which I am trying to contain with a spray for that disease. However, I have lots of buds which turn into tiny ...
4
votes
0answers
26 views

What is this rock-like fungus?

About the size of a rock - I actually thought that's what it was at first. The inner brown markings amazed me thinking the internals were eroded and exposed. But touching the surface with my shoe ...
4
votes
0answers
25 views

Acidic soil containing chalk?

I’ve recently bought a property in a ‘dry chalk valley’. It’s an old barn with a paddock out the back. I bought an electronic soil pH meter (two prongs with an analog dial meter) and followed the ...
4
votes
0answers
37 views

Why do my Roma tomatoes look like this?

I basically just planted this plant and let it grow all summer more or less untended. It's become extremely viney, and has a ton of aphids. We live in a very dry area, near Sacramento, and I'm curious ...
4
votes
0answers
27 views

What's wrong with my fairy castle cactus?

My cactus used to be really thick and dark green but now it's so much skinnier and starting to shrivel up. Some of the arms are turning a dusty kind of brown and they're all leaning away from the stem ...
4
votes
0answers
29 views

Why are my basil leaves turning black?

Seeking all the experts out there. Just while I was going out to water my basil plant just now, I realised that some leaves have developed dark spots as shown in the pictures. I have immediately ...
4
votes
1answer
81 views

Identifying plant species (cactus)

I would be grateful if someone could help me with identifying this cacti I bought. I did some research and concluded it could be Pilosocereus chrysostele. But I am not really sure as there are some ...
4
votes
0answers
65 views

What would strip the bark off a 20+ foot American Elm tree overnight?

I have a 20+ foot tall American Elm tree. I believe it was unharmed yesterday. Today the bark was stripped almost entirely around the several-inch-wide trunk and in various places up to a height of ...
4
votes
0answers
110 views

What's this tree with slightly hairy green leaves with white veins and borders?

I got a hold of this tree recently (it was in my backyard when I moved in), and want to find out what specific tree it is so I can make sure my care is appropriate. Click to expand pics: As the first ...
4
votes
0answers
30 views

Could my courgettes have mosaic virus?

This was my first time (attempting) to grow courgettes. I used Cucurbita pepo Black Beauty seeds and all seemed ok to start with. I possibly planted them out too early (mid April) as had some ...

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