For questions about trees: selection, planting, care, diagnosis, pruning, etc.

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Is it important to deal with gall wasps on oak trees? If so, what is the best method?

Gall wasps are a common problem here on the east end of Long Island. Oaks are a dominant species around here, and many clients rely on them for shade around their houses and yards. What should be done ...
3
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1answer
32 views

How can I determine the variety of an apple tree that hasn't fruited?

Perhaps 10 years ago I planted several apple trees on my farm. These may have been bought at the local blue or orange store and I've long since forgotten the varieties planted. I didn't keep such ...
5
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1answer
190 views

Should I plant a Common Hackberry tree in my front yard for shade?

My front yard (in Northern New Mexico, zone 7a) is in desperate need of a shade tree. The soil is relatively poor and there's not a lot of water. I'm making a list of trees that I think would work in ...
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1answer
29 views

Will coppicing a Siberian elm tree get rid of bacterial wetwood (slime flux)?

Will coppicing a Siberian elm tree cure it of bacterial wetwood or slime flux? I know you can coppice Siberian elm trees and they will grow back (if what I've read about people trying to kill the ...
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1answer
19 views

In graft hybridisation does a younger stock facilitate more extensive hybrid effects in the scion?

There are anecdotes and articles where one kind of tree fruit scion has been grafted to the stock of another kind, perhaps with an interstock, and properties like flavour and shape have been affected ...
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3answers
571 views

Do pine beetles kill healthy pitch pines, or is it safe to plant seedlings to replace trees killed by them?

We need to remove a number of trees that have been killed by some kind of pine beetle - presumably black turpentine beetle - on eastern Long Island. These trees had suffered injury from salt spray ...
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2answers
90 views

What is this white flowered tree?

Could anyone identify this white-flowered tree please (planted in the UK), I was told the name and I think it begins with an 'S' but I can't remember it
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1answer
45 views

What's wrong with this Photinia fraseri tree?

I've got 3 photinia fraseri trees in my yard in Tucson, AZ. They were planted last May (2013) and one of them is turning entirely brown and losing all its leaves (over the course of the past month or ...
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1answer
149 views

Why Do Trees In Swampy or Wet Areas Change Color Earlier?

Not a gardening question per-se, but I believe this is the best exchange for it. It had been my observation here in the northern temperate zone that trees growing in low-lying, wet areas change to ...
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3answers
126 views

Can I cover mature tree roots with fresh wood chips?

We are having trees trimmed and the branches put through a wood chipper. Can we use the resulting mulch to cover exposed roots on mature trees as soon as the come out of the chipper?
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1answer
138 views

How should I care for a new Mimosa tree growing out of an old Mimosa stump?

We lost an old Mimosa to borers and it fell over in a wind storm. This spring it started a new growth out of the cut stump.It looks healthy but is growing RAPIDLY and it does not have much space. We ...
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2answers
92 views

What's this seed? Maple? Sycamore?

The seeds pictured below fall around my neighbourhood every Autumn (Southern Hemisphere - New Zealand). The seeds are blown over quite a vast area and I haven't been able to identify the tree(s) ...
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1answer
119 views

What kind of tree is this?

Asking from northeast New Jersey. Sorry I couldn't get a better picture of it - I'm hoping this is enough to identify it. These pictures were taken from below the tree branches. The tree is in the ...
6
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1answer
131 views

Can anyone identify this seed/fruit and what tree it has come from?

I was given this seed/fruit by a friend who found it on a walk through the countryside. I have no clue what plant it is from and want to plant it. I'm from Ireland but I'm pretty sure it is not a ...
3
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1answer
63 views

Is it possible to graft together a self-pollinating cherry tree?

Earlier today I asked this question: How do you tell if a tree is male or female? because I've been looking into fruit trees and learning about what is needed for them to bear fruit. So based on this ...
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1answer
1k views

How do you tell if a tree is male or female?

I was reading through some of the questions on fruit trees, because I've been thinking about getting some blueberry bushes and cherry trees, and I see a lot of people mentioning that the trees don't ...
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2answers
93 views

What small pines and deciduous trees are suitable for terrarium culture?

I am building a terrarium for some ex-Oregon family members. I really want to capture Oregon with its moss, ferns, trees and of course pine trees. I don't know of really any small pine trees that ...
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1answer
117 views

What is this tree with alternate leaves, and large green fruits?

I was told it was an almond tree, but after looking almond trees up, I don't think that's what it is. The green drupes turn yellowish/brownish and partially split open and drop. When I open them, ...
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2answers
166 views

How do I kill this salt cedar?

The front yard of my New Mexico (USDA zone 7a) house has a salt cedar (Tamarix ramosissima), which is growing like a huge bush. Its salt uptake appears to be preventing anything else in the vicinity ...
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1answer
113 views

What is causing yellow spots with 'hair growth' on the underside of the leaves on my tree?

I've slowly been bringing this tree back from some devastating summers 5 years ago where several large branches died. I've been diligent about pruning and feeding. For lack of a better description, ...
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3answers
181 views

Small Baby tree growing its roots right next to the base of my house. Should I be worried? [duplicate]

Should I pull out the tree? It stands at roughly 10 feet tall. With green colored branches. The stem of the tree is indeed brown and wooden. I have no clue how deep the roots are. Will the roots ...
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4answers
241 views

Why is my new Acer tree dying?

I recently bought a small red Acer and moved it into a more permanent pot. It's about 2 1/2 feet tall and since I've moved it, the leaves have have started to brown and shrivel like a dead leaf would ...
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1answer
81 views

Why is the leaf on my avocado tree drooping? [duplicate]

I have had an indoor avocado tree for a couple of months, but it doesn't look like the pictures on Google. One leaf is almost touching the tree. The new leaves on top are fine but when others appear ...
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2answers
84 views

What zone 5 trees and shrubs produce the most pollen?

Is some pollen more likely to provoke an allergic reaction than others? We are thinking of planting a tree or shrub like a smoke bush (Cotinus) and would like to know if this means more sniffing in ...
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3answers
105 views

Are my Emerald Arborvitaes recoverable?

I bought 31 thujas a couple of months ago and some of them are really struggling. I installed a drip line a week ago, but am wondering if these trees are completely dead. Here's a bunch of pics: ...
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2answers
383 views

What is the name of this tree and is it dangerous for our daughter?

We have two identical big trees right behind our property in Southern California that just started dropping their pods and seeds into our yard and we're having a hard time to keep our two-year-old ...
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3answers
459 views

What kind of tree is this and what's wrong with it?

The developer in my neighboorhood was so kind as to plant trees in everyone's yard. But after 3 or 4 years all but one or two (so probably 180 or so) look scrawny and pathetic. I know nothing of ...
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1answer
185 views

How do I get rid of root suckers in my yard from my neighbor's big tree?

My neighbor has a tall very leafy tree. The leaves are kind of heart-shaped, or larger at the top than at the bottom. They are arranged on the stem. I am finding little mini trees growing all over ...
4
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3answers
382 views

How do I remove oak seedlings which sprouted in my garden?

I have an oak tree at the bottom of my garden and it has produced small trees due to fallen acorns in the grass. I need to remove them. How do I do that?
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2answers
142 views

Will Arborvitae regrow to their usual shape after being partially eaten by deer?

I planted a bunch of Arborvitae in my yard and last winter the deer ate the bottom portion of 2 or 3 of them. I did some Googling to see if they'd grow back, and while most sources say that they will ...
4
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3answers
121 views

How large can potted patio trees grow in the US northeast?

I have a large sunny patio that I would like to shade with the largest potted trees that I can grow practically in the northeast of the U.S. (New England, 6a). What trees are suitable and how large ...
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1answer
115 views

What is this small tree with purple leaves and small green fruits?

I'd like to get one of these for my back yard but I'm not sure what kind of tree it is... anybody know?
2
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1answer
54 views

What should I do about a newly planted avocado tree that stopped growing?

The new avocado tree that I bought isn't growing well since I planted it in the ground. Should I put more soil around it to build the ground up?
3
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1answer
68 views

Why does my apple tree not bear fruit?

I currently live in southern Massachusetts. When an apple tree in my backyard blossoms and the little apples begin to show, they all disappear and begin to fall on the ground. FYI, there are also ...
4
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1answer
76 views

Is inosculating trees for shape practical for the home garden?

I've recently discovered a very cool method of tree training in which saplings are trained to a rigid form, and fused (inosculated) at certain points, to become a desired shape. If I follow the basic ...
3
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2answers
198 views

How do you know when a tree has died?

A tree trust planted 2 trees for me along my fence-line. One hasn't budded at all this spring, the other tree has a few small leaves on one of the lowest branches. I have a lot of ...
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4answers
118 views

What's this gash on a Maple tree?

What's this gash on a Maple tree? It seems almost "infected" compared to the "normal" splitting I see on the other Maple tree right now. NOTE: It's been raining all day. That second photo is ...
3
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1answer
106 views

What variety of plum tree do I have? [closed]

I bought house in central Oklahoma 4 years ago. It has a plum tree that sits alone in front yard. 2 years ago it produced the best plums I've ever had but none since. I've tried to find out why which ...
2
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2answers
61 views

What is this tree seedling (White Oak, something else?) from Piedmont Region, MD?

I'm gradually trying to get invasives removed from our property, replacing with natives to this area. I believe this is a tree seedling, and I think it's white oak (which would be good for this area). ...
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1answer
96 views

What conditions cause trunk sprouts on oak trees?

I asked a similar question here, but something annoying is catching my attention. Almost all of the pin oak trees in my area are sprouting up and down the trunks like crazy this spring, many of them ...
2
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1answer
43 views

How do I treat a rose tree that appears to be in shock but still has rose hips and has plenty of root suckers?

I have two Sunny Knock-out rose trees that were transitioned from pots to sunny landscape areas in the front of my home. The trees appear to be in shock. If not for the Sucker roots extending above ...
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0answers
47 views

What is eating my orange trees? [closed]

I have 3 navel orange trees in my backyard and the leaves are being eaten by something. What is it that is eating the leaves, and what can I do to prevent this?
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2answers
72 views

Is it possible for a transplanted baby Maple to grow into a Bonsai tree?

My understanding is that a real Bonsai tree is already very old living in a crevice somewhere, naturally tiny then transplanted. In 50 years living in these pots, what would these Maples look like ...
2
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2answers
66 views

What should I do with a wind-harmed tree that will not regrow leaves?

This tree was planted in May 2011 in Dallas, Texas. Unfortunately the month or so following were some of the windiest we've had and all of the leaves it had at the time were blown off and the tree ...
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1answer
86 views

How can I save my dying palm tree?

My palm tree started to become yellow in the last couple of months and I don't see any improvement. I've tried with some spike fertilizers for palm trees, but didn't seem to help. Here are some ...
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1answer
58 views

What plant will grow to about 3' in the shade from a pepper tree and oleanders?

Is there a low light plant, that will grow under a pepper tree, and between two oleanders, that grows about 3-5 feet tall, in southern California?
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1answer
54 views

What kind of trees can be kept in an apartment?

I live in an apartment and I want to have some indoor trees in my apartment. We have a large window that faces to the north-east and has curtains. What kind of trees can be kept in an apartment?
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1answer
55 views

How to heal this needled plant?

This little guy is suffering and I'm not sure how to help him out. Any ideas?
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2answers
301 views

Can a lemon tree become an orange tree?

I feel stupid to ask this, as there are many posts on Google about this, and I can't tell, if people are writing these stories for fun or it is real. Some claim that if you have a many old lemon ...
6
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1answer
74 views

How close should a maple tree sapling be to marked utilities?

Last summer I planted a maple sapling in my yard. I foolishly did this without calling 811. This month I have other work to do and had my utilities marked. When the marking was done I discovered that ...