Tag for questions asking how to look after trees.

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17
votes
7answers
21k views

Why do people paint some tree trunks white at the bottom?

I've seen trees with the lower trunks painted white in a number of places around the world but have never found a definite answer to why this is done. Some suggestions that I've heard are to make them ...
6
votes
2answers
224 views

What is happening to the leaves of my avocado?

I have an avocado plant in my outdoors balcony. It's been growing nicely, but there are small brown dots/holes in the leaves for some time now. I don't see anything in the underside of the leaves, and ...
9
votes
3answers
3k views

Can I move a self-seeded oak tree into a pot to keep it small?

An oak has self seeded in our garden. Has got to about a metre tall and seems happy. We don't have anywhere near enough space for an oak but seems a shame to kill it. Can we move it to a pot to keep ...
2
votes
0answers
20 views

What are the limits to growing plants hydroponically?

I'm working with a group of artists, educators and engineers to develop new methods for STEM teaching in classrooms and museums. Right now, we are trying to design a room-sized model of the carbon ...
1
vote
0answers
34 views

Can these two trees be identified by photo.

I would like know what these tree are. They are located in San Diego county California. The trees may not be native. Thanks, Jon.
0
votes
1answer
66 views

How do I prevent Ficus tree roots from invading other areas?

How far can I cut back the roots on my Ficus trees and maintain their life? Is this even possible? They are approximately 20 ft in height and 10 yrs old.
5
votes
1answer
51 views

Topping a Redwood Tree

Our redwood is about 30 years old and about 4 stories high. I would like to shape and top it to keep under control. Would it be fine to top off about 10 or 15 feet and also shape it? A tree trimmer ...
4
votes
2answers
176 views

How do I stop palm trees from sprouting from the side?

My 6-7 year-old outdoor date palm trees are growing side-sprouts, resulting in multiple trunks. How do I prevent this from happening?
2
votes
2answers
48 views

How do I know if an ash tree can be treated for emerald ash borer or needs to be removed?

I have 16 Emerald ash trees that have been hit with the emerald ash borer. While I have seen the ash borer's bore holes and the epicormic sprouting of branches in random places, I question whether or ...
4
votes
2answers
1k views

How to care for a large redwood?

I just bought a home in the CA bay area. My front yard is dominated by a large redwood tree that seems in good health. I really love the way it looks. By large I mean 5-6 stories in height, planted ...
1
vote
1answer
35 views

Does a birch clump need to be trained?

I planted a clump of three birch trees. Do the trunks need to be trained to get the desired spacing or angle as they grow?
4
votes
1answer
94 views

What is wrong with my lemon tree? [duplicate]

Below is a picture of my lemon tree, which now have some sticky web infection. See left corner on the first picture. On the second picture is a close up of something that is being spread from the ...
9
votes
3answers
3k views

How to deal with suckers on a Bradford Pear Tree?

I have two Bradford Pear Trees at the front of my yard. They were planted ~1997. (The HOA requires all lots in the development to have them.) Little sprouts that keep popping up from the ground ...
0
votes
1answer
67 views

What is this plant with the prune tree?

I have planted a prune tree last year and today when I looked at it, I saw it was made of 2 kinds of plants. I am not even sure which one is which. So my questions are: What are these plants? Should ...
6
votes
3answers
12k views

How should I prune weeping willow?

I prune a lot of of neighborhood trees, but I've come to a small problem. Some people like their weeping willows high enough that they can walk underneath without brushing it. I had been doing this by ...
4
votes
1answer
80 views

What are these red “quills” on my willow tree?

I just noticed several clusters of red "quills" which sort of look like small buds on the main trunk and the two largest lower branches on my weeping willow tree. The little growths are red and ...
5
votes
2answers
3k views

Are my autumn blaze maple trees dying?

We live in Oklahoma and planted some autumn blaze maple trees last fall. They seemed to come out of dormancy fine and the leaves were nice and green. We planted them in an area that stays pretty ...
3
votes
1answer
64 views

Did this saucer magnolia likely suffer a mortal wound?

This morning my wife told me that the landscapers for my townhouse complex hit a saucer magnolia tree on our property with their truck while doing their work. My wife said that the tree was knocked ...
3
votes
1answer
53 views

What determines the year-to-year growth in girth of any particular tree?

I'm growing some apple trees from seed and started this year. I'm worried that the width of their stems (or trunks, but they're too small to really call them "trunks") is too small in proportion to ...
3
votes
1answer
189 views

Holes in leaves of Yoshino Cherry

I have just started gardening. My first tree purchase was a Yoshino Cherry (Prunus y yedoensis Ivensii). After potting it into a larger pot, it has started to have lots of holes appear in the leaves. ...
2
votes
1answer
330 views

What's causing the bark on my maple sapling to split?

I planted a Maple sapling in my front yard in November 2011, and it hasn't shown very much growth since. It gets leaves during the spring, but they seem to fall off earlier than all the other trees in ...
3
votes
1answer
93 views

Relocating an apple tree - when should this be done?

A long time ago (about ten years), I put some apple seeds in the ground, and now I have an apple tree. The only problem is that it is too close to the neighbour's house, and might do some damage to it ...
1
vote
1answer
92 views

How do I deal with a pine tree infestation?

My pine tree is heavily infested with some kind of white stuff. It looks like some kind of scales or white powder that is covering all the pine needles. Anyone know how to deal with this without ...
20
votes
2answers
716 views

How can I revive a tree that's been stripped of bark?

I've got what I think is a cedar tree in my backyard that is missing most of its bark on one side from the ground to about 4' up. (Thanks to my puppy who is a shredding machine.) The branches next to ...
5
votes
1answer
313 views

Can I get rid of sap stains on my mulberry tree?

My mulberry tree was leaking sap earlier and it left ugly black stains down the trunk. The tree has deeply furrowed bark. Can I remove this?
4
votes
2answers
216 views

What kind of palm tree is this and how do I care for it?

I bought a new house and have this palm tree in the front yard. No one lived in the house for over two years so it's been neglected but still looks healthy. What's the best way to clean it up and have ...
4
votes
2answers
734 views

Is there a way to save this half-dead evergreen tree?

I just moved into a home and this tree is planted in the yard. Half of it seems to be in good shape but the other half has no leaves and seems dead. I'm not sure what, if anything, I can do to save or ...
3
votes
1answer
77 views

How to best care for mature trees?

I've got several mature trees in my yard. I just moved into the home and for the last two years not a lot of care was given to the trees. As a first step I've removed all the trees that were scattered ...
1
vote
2answers
681 views

How can I rejuvenate a privet and hawthorn hedge?

I have a mixed hedge which is about 6 feet high. I think it is privet and hawthorn. Currently, it is very top heavy in terms of the growth, and it has a lot of bare stems lower down. Please see the ...
2
votes
2answers
493 views

When to repot a young juniper bonsai?

I live in an area of the United State where it's never really safe to say that winter is over. Just when you think it's spring, it can be blizzarding and below zero. Anyway, should I wait until it's ...
8
votes
2answers
216 views

What to do when an animal dies inside a hollow tree?

We have a beautiful Shag Bark Hickory next to the house with a large hole about 18' up. A family of raccoons moved in a few weeks ago and had a litter. Recently we've seen a lot of domestic ...
6
votes
1answer
919 views

what care should I give my lemon and orange tree after 8 months neglect?

In July I moved into a new house with an established lemon tree (about 4-5 m high) and orange tree (3-4 m high). Apart from collecting the last crop we have left them alone. The previous tenants grew ...
2
votes
1answer
351 views

Schefflera Arboricola (Umbrella Tree) in bad shape :(

I've had it for 7 years and in the last 2-3 months it has been losing all of its leaves. In an attempt to save what is left of it, I transplanted it today into a larger pot with fresh organic soil. i ...
5
votes
1answer
530 views

Pruning a mimosa

I have a mimosa and I have to prune it. I'd like to be less invasive and do this "operation" in the best way. Which is the best weather to prune mimosa? Which is the best time to do it?
9
votes
2answers
15k views

How do I encourage my plum tree to produce fruit?

I have a victoria plum which I planted almost 3 years ago and hasn't produced any fruit. Last year (1st summer) it produced a small amount of blossom. This year it produced a lot of blossom but no ...
12
votes
4answers
19k views

How far (on average) do tree roots extend out from the base of the tree?

I a looking to plot out my new garden site for next year and am wondering how far I need to be away from some nearby trees. The trees are a few different types (apple, oak, pine etc.) and anywhere ...
10
votes
1answer
1k views

Is there a traditional method/style for pruning a Chocolate Silk tree?

I have a containerized Chocolate Silk (a.k.a. Summer Chocolate) tree that is two years old (i.e. it was planted in its present container from a branchless and rootless stalk two years ago). It has ...
4
votes
1answer
406 views

Is my tree bleeding to death?

Our builder planted this tree, and I have no idea what kind it is. The bark seems to split and a lot of sap runs out of the tree. Since I don't know what kind of tree this is, I haven't been able to ...
3
votes
4answers
153 views

During a heat wave, is it good to use an atomizer during daylight to spread water on the leaves of my Acer Palmatum?

I couldn't resist, I offered myself an Acer Palmatum one week ago. And now we face one of the hottest heat wave nowadays in Europe. I noticed some leaves are already dry, some of them are burnt. I ...
3
votes
1answer
266 views

oak tree white fuzz

Any idea what this is on my oak tree?? We are in the middle of a drought in central illinois and I've been seeing this on the back of my leaves.
4
votes
1answer
232 views

Is there a way to encourage needle re-growth in fir trees?

My wife bought a potted "Christmas Tree" last year in the week running up to Christmas. It wasn't in the best of shape when we got it and about a week after being inside the house, it shed the ...
8
votes
1answer
1k views

How can I determine which trees are unsafe in strong winds?

We had some fairly extreme weather in the UK, enough wind to blow over a tree. Luckily nobody was hurt as the trunk rested larger branches, narrowly missing the neighbours fence. The trunk and ...
2
votes
1answer
212 views

Chinaberry stump

I had a 30 ft chinaberry removed that the previous owner left for me, four months ago. It had multiple split trunks at the bottom that made every arborist that looked at it concerned, and it was ...
4
votes
1answer
178 views

What are some recommendations for a potted orange tree?

My wife and I would like to have a potted orange tree. We live in the San Diego area so the climate for citrus trees is near perfect, but we don't know what kind of tree we should buy. Also, how large ...
1
vote
1answer
172 views

How can I make my seedling jacaranda recover

I've grown a jacaranda tree from seed a few months ago. It was developing ok until a few days ago when I found it in a really bad condition. I guess it was the cold weather (I'm in South America and ...
5
votes
2answers
662 views

Can I put a compost pile under a tree?

The most convenient spot for my new compost pile happens to be under a young apple tree. I would put it there, but I have a few questions first. Will I be able to make successful compost in heavy ...
12
votes
3answers
6k 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 ...
5
votes
1answer
2k views

Are tar based products really useful in treating tree wounds?

There are a lot of articles on the web ranked highly in searches that advocate the use of tar/tar based products to seal tree wounds such as pruning cuts. For example — "Homemade tree wounds". ...
10
votes
1answer
209 views

How are Japanese Maple Trees cultivated?

I have mature Japanese maple trees in my yard that are extremely fertile. I find dozens, if not hundreds of saplings all over the yard. Some have even grown several feet tall. Is there a way I can ...
5
votes
1answer
127 views

Are lichens healthy for trees?

I've always thought lichens were neutral to tree health, and I think they are attractive, but someone recently told me to get rid of them, because they will cause rot and harbor disease. Do they ...