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

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2
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1answer
16 views

Should I remove brown, cap-shaped Birch Polypore mushrooms from my tree?

I learned from this question that my birch tree is infested with Birch Polypore mushrooms. For two reasons, I'm wondering if I should remove them. First, even though they grow because the tree is ...
3
votes
0answers
22 views

Avocado leaves drying out from edges

I recently moved into a house in the South SF Bay Area in California, with three large avocado trees. I've noticed that the leaves on one of these trees is drying out from the edges: Here's another ...
-1
votes
1answer
39 views

Why is my lemon tree losing leaves after I gave it tomato feed?

There are pale blotches on the leaves of my lemon tree. There are no pests or mites, but all leaves have fallen from tree. I have tried a tomato feed with no results.
1
vote
1answer
40 views

What is the best growing temperatures for an avocado plant?

I live in a very warm climate (Phoenix AZ) and I was wondering what the best growing conditions (temperatures) are for an avocado plant? Are the extreme heat summers here to much for an avocado? We ...
2
votes
2answers
29 views

Can I use 12-6-9 fertilizer sticks for a Ficus Bonsai?

I have a bunch of plant food sticks described as "compound organic and inorganic NPK 12-6-9 fertilizer with micronutrients for ornamental plants". I wonder if this is suitable for a Ficus (Ginseng?) ...
7
votes
1answer
472 views

What are these brown, cap-shaped mushrooms on my birch tree?

I live in Massachusetts and have several birch trees in my yard. One of them has brown, cap-shaped mushrooms growing in groups up and down the trunk. As you can see, the tree has a big crack in the ...
3
votes
1answer
52 views

Is it really that important to prune deadwood from trees? If so, why?

It seems like every time we bring arborists onto a property, the first thing they want to do is to remove all the deadwood from the tree canopies. What are the reasons for doing this, and is it really ...
3
votes
1answer
39 views

How do I take care of my very small Kaffir lime tree?

What is the general care of Kaffir lime (Citrus hystrix) trees? I have a very small tree that I'm growing as a houseplant. How do I care for it? Does it need a bigger pot?
4
votes
2answers
65 views

Can I water indoor fruit trees with aquarium water?

I have kiwi, lemon, orange, mandarin and avocado trees, grown from seed from normal fruit which I have eaten. I also have an aquarium with turtle. I've treated aquarium water with ReptoSafe and ...
3
votes
1answer
41 views

What is the name of this tree? - currently a bonsai

I'm trying to find the name of this tree. It's currently a bonsai and isn't doing very well, indoors or out. It came with no identification and very basic instructions like "don't let it dry out." ...
3
votes
1answer
36 views

How close to a mature douglas fir can I place a septic tank and leach field?

I have two mature douglas fir trees (40') on my lot. How close to them can a septic tank or leach field be placed safely to avoid root invasion?
4
votes
3answers
138 views

What is the name of this tree found in Switzerland?

What is the name of this tree? They are quite common in Switzerland. The second picture refers to Lugano. Here a couple of pictures in summer (with leaves):
2
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0answers
44 views

My avocado tree is not doing well [closed]

My avocado tree has been growing for a year just in the last few days the top has started to droop and bend over sideways the rest of the tree looks healthy but my healthy leaves are falling off. I ...
4
votes
1answer
38 views

How should I prune a common fig for best productivity?

Figs have a unique fruiting cycle, fruiting on old wood first, all at once, then on new wood for the rest of the season. What's the best pruning system for these, to maximize production? Is it best ...
7
votes
2answers
156 views

What is a sucker and how does it differ from a water sprout or branch?

In a post about renovating mature pear trees there is a diagram (below) showing tree nomenclature as it pertains to pruning. In it, the letter "A" indicates suckers, and "E" marks shaded interior ...
6
votes
2answers
98 views

Renovating mature pear trees

Of the descriptions about renovating mature fruit trees these two seem useful: Ohio State University Extension Fact Sheet - Pruning Mature Apples and Pears & Fedco Trees Tips for Renovating Old ...
3
votes
1answer
36 views

Is it possible for an almond tree to grow in a tropical country?

I have been searching in Google, but I got neither information or reference regarding this issue. I'm wondering is it possible for an almond tree to grow in a tropical country such as Indonesia? If ...
1
vote
2answers
50 views

What equipment do I need to transplant a 20' tall pin oak?

I knew a guy who moved 7 or 8 large (for moving) 20-35' pin oaks. He used a backhoe, digging out around the rootball, while leaving it intact. While this was successful, and the trees did very well, ...
3
votes
0answers
37 views

What is yield of a tea tree? [closed]

I would like to plan plantation of tea. I would like to know how much tea a tea tree would yield. What is the quantity / frequency?
3
votes
3answers
63 views

How do I control suckers on pear trees?

I have several ornamental pear trees of which one keeps producing suckers. I have tried cutting them off as low down as possible and have even resorted to weedkiller but they just seem to keep coming ...
3
votes
0answers
24 views

How often can I harvest coppiced black-locusts?

I would like to coppice some black locust trees (Robinia pseudoacacia) for fence post production. The conditions are fairly good. This is USDA hardiness zone 6b, with good clay based topsoil, and ...
4
votes
0answers
95 views

What is this plant called? [closed]

I am doing a project about plants and I am new at this. I found this in a park in Cairo, Egypt. Would be great if someone can identify it.
3
votes
2answers
122 views

Bay Leaf Tree (Laurus Nobilis) with severe scale

I'm new to gardening as I have just bought my first house. I inherited a very large (about 6m tall) Bay tree that is severely sick. I took a sample to my local garden center and I was told that it ...
5
votes
1answer
50 views

What to do against my Catalpa rooting in the neighbour's garden?

I have a Catalpa tree in the center of my yard. Today the neighbor showed me it's roots are showing in his (vegetable) garden. He went looking for it after noticing that his crops were smaller at ...
3
votes
1answer
32 views

What to do with a this tree which has become to big for its current position?

I've got an tree (see this question for ID) which has been planted by the previous owner in a position where it now has outgrown. I would like to remove it from there and like know what are my ...
5
votes
1answer
93 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 ...
3
votes
1answer
71 views

Can this tree be an eucalyptus tree growing in Central Europe?

I have this tree in my garden. The previous owner, who planted it, told me it is a kind of eucalyptus. When rubbing a leave between the fingers it indeed has the smell I know of eucalyptus-sweets. 3 ...
4
votes
2answers
55 views

How far apart should I space Thuja 'Green Giant'?

If I wanted to plant several Thuja plicata x standishii 'Green Giant', how far apart should they be placed, or does it matter? Some evergreens seem to like being planted close together (and growing ...
4
votes
3answers
53 views

Does a Japanese maple require special care when a post-hole is dug in the root system?

I need to put a post down to support a carport. The post would be embedded in a concrete block approx. 60cm x 60cm. This is 3 metres from the trunk of a Japanese Maple about 5 metres tall. Is there a ...
3
votes
1answer
189 views

What is the term for this pruning technique that causes stubby, clublike branches?

These Platanus × acerifolia trees (London Planetree) were pruned to have this short, stubby branch structure. What is this called, and how is is done?
5
votes
4answers
137 views

Can I graft a branch of a sweet orange onto a sour orange tree to get sweet fruit?

I have two old citrus trees, one bears sweet navel-type oranges and the other has hundreds of impossibly sour, tiny oranges. Would it be possible to chop off a branch from the sweet tree and attach ...
2
votes
2answers
47 views

Do sumacs transplant well?

We are having difficulty sourcing sumacs (Rhus copallinum) larger than 6-7' locally, so we are considering digging some from an old field. We can find 8-10' plants in the ground fairly readily. Are ...
3
votes
2answers
85 views

What is apical dominance?

When pruning trees, most notably conifers, you must be aware of a phenomenon known as 'apical dominance', when choosing your pruning technique, and selecting shoots for the permanent structure. What ...
8
votes
1answer
130 views

What is this woody plant with spicy, citrus flavored twigs?

I was out hiking today, and, as I often do, I absentmindedly chewed on twigs that I broke off from around shoulder height. I noticed that one twig had a spicy, citrus flavor. It reminded me of ...
2
votes
1answer
48 views

What evergreens will tolerate alkaline clay soil in USDA zone 4?

Although the area where I live is famed for it's white pine they grow in sandy soils. My garden has a thin skim of topsoil over six feet of compact alkaline (ph 7) clay. My dwarf white pine is doing ...
5
votes
1answer
65 views

How do I treat and care for trees infested with borers?

One of my apple trees recently started to look like it's dying (leaves dying when they shouldn't, bark peeling, lack of fruit, new branches growing and then quickly dying). My neighbor looked at it ...
3
votes
2answers
150 views

What happens when a chainsaw chain meets a nail or piece of steel wire when cutting through wood?

Assuming any of the following: there's an unnoticed steel nail in a log used in some structure or there's an unnoticed steel nail in a tree body (often happens when people attach illegal ads to ...
3
votes
1answer
61 views

Help me to identify these two trees in my back yard?

I have two trees in my backyard that I need help identifying. My home is in Port Saint Lucie, which is on the eastern coast of the southern half of Florida. Hardiness zone 10a. My home backs into a ...
2
votes
2answers
60 views

Which high-desert-friendly tree should I plant beside my driveway?

My property (New Mexico, climate zone 7a) has a patch of ground between my driveway and a fence that's begging for a tree to be there. It's about 11 feet wide. Apparently a tree was there before, as ...
1
vote
1answer
105 views

Is it normal for palm trees to drip a brown gummy sap?

Our apartment in Tenerife has palm trees surrounding it and these trees are continuously dripping a brown gummy substance, we presume from their leaves, onto our tiled floor. We are informed that ...
3
votes
0answers
48 views

How much should I water an avocado plant guided by a moisture meter?

I have a moisture meter that registers readings from 0.0 to 9.9 (driest to wettest). I cannot find a listing for a potted avocado tree. Can you give me info as to what percentage is optimal for the ...
2
votes
1answer
67 views

Are these trees some type of poplar?

Here are a few pictures of some trees in my yard. I am trying to determine what type they are. I'm fairly certain they are some type of poplar tree. But I am not sure of the specific type. This is in ...
5
votes
2answers
494 views

Is this an Oak Tree?

I've got this tree down in my back yard and I cannot figure out what type it is. The bark looks like Oak but the leaves I'm not sure about. There have been no nuts/acorns drop from it that have been ...
4
votes
1answer
95 views

What are these trees in the front of the picture?

Here are the trees I'm wondering about: They are growing in Hong Kong. They have moderate length leaves pointing downwards, and are twice as tall as road signs. They look like young palm trees, ...
4
votes
2answers
67 views

Do I need to change the irrigation for my Shamel Ash trees?

I have three Shamel Ashes in my yard, all planted at roughly the same time and all irrigated in the same way. Despite professional care they haven't shown any substantial growth in over a year. If ...
4
votes
2answers
85 views

How do I get ready for a stump grinding, and how long afterwards should I wait to replant?

The city has cut down my dead ash tree and are coming to remove the stump (I believe by grinding). They have advised me to "remove landscaping features" so they aren't destroyed in the process. How ...
1
vote
1answer
40 views

My Emerald Arborvitaes are Yellowing on the Inside! [duplicate]

I live in Utah and the weather is getting a bit colder. About a month ago all my of trees were going very strong, all green throughout, but now they are starting to yellow from the inside out. This ...
3
votes
1answer
130 views

Can the roots of a Redwood tree lift up the foundation of my house?

I have a large (80 years old) Redwood Tree in my front yard, approximately 10 feet from the house. My house is a ranch style house and I can see the roots of the tree go under the house in the front ...
3
votes
1answer
115 views

Is dolgo crabapple a dwarfing rootstock?

Emerald Spire crabapple is produced by grafting onto Dolgo crabapple stock. I know that apples are commonly grafted onto crabapple rootstocks to dwarf them. On a Dolgo root stock the tree nominally ...
4
votes
2answers
68 views

Is early October too late to plant a Pussy Willow in southern Ontario?

I have a pussy willow that has rooted. It was part of a floral arrangement that I used to stage my condo while I was selling it. Now I have moved to a house with a garden so I would love to plant the ...