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

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3
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3answers
297 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?) ...
8
votes
1answer
591 views

What does 'standard' mean when referring to shrubs and vines?

I often see shrubs and vines for sale labeled as 'standards'. What does that mean? Examples: Roses Rose of Sharon Trumpet Vine Wisteria And so on.
6
votes
1answer
129 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." ...
6
votes
3answers
1k 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 ...
4
votes
1answer
141 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 ...
0
votes
1answer
133 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.
2
votes
1answer
186 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 ...
4
votes
1answer
216 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 ...
2
votes
1answer
1k 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 ...
4
votes
1answer
160 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?
5
votes
2answers
962 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):
3
votes
1answer
217 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
1answer
97 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 ...
2
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0answers
79 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 ...
9
votes
2answers
488 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 ...
7
votes
2answers
219 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 ...
6
votes
4answers
1k 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 ...
4
votes
3answers
430 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 ...
2
votes
2answers
301 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
50 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?
5
votes
2answers
605 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 ...
8
votes
1answer
1k 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 ...
9
votes
3answers
8k views

How should I prune this overgrown pear tree?

I have a pear tree, which is very zealous. Whatever it decides to do, it does in excess. First in the spring it sends out all sorts of new branches--all of them vertical. I snipped them off after they ...
4
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0answers
216 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.
6
votes
1answer
754 views

What is this tree with ovate-elliptical, serrate leaves, and racemes of small berries?

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
votes
1answer
114 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 ...
5
votes
1answer
187 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 ...
5
votes
3answers
72 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 ...
9
votes
1answer
693 views

How to prevent regrowth of elm saplings from concrete foundation?

At the base of our old garage where the concrete foundation meets an asphalt slope down to the alley behind, we've had small elm tree saplings grow as weeds over the past three years. I've never ...
5
votes
1answer
518 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?
3
votes
2answers
56 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 ...
9
votes
1answer
170 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 ...
3
votes
1answer
541 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 ...
7
votes
1answer
272 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 ...
9
votes
1answer
1k views

How can I love a Silver Maple?

I'm reading this question What is the average lifespan of most maple trees? and the answer mentions: Silver maple 100 years (I cannot imagine why you would want to plant this species) followed ...
4
votes
2answers
2k 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
2answers
178 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 ...
9
votes
1answer
1k views

What are the best deciduous shade trees for Phoenix, Arizona?

I'm looking for a medium sized deciduous shade tree to plant in Phoenix, Arizona to shade part of my house. It needs to be deciduous so that it will let the sun through in the winter and provide shade ...
4
votes
1answer
126 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 ...
2
votes
1answer
2k 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 ...
5
votes
1answer
137 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, ...
5
votes
2answers
318 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 ...
5
votes
2answers
644 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 ...
2
votes
1answer
110 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 ...
6
votes
1answer
766 views

Cedar Hedge drying from the inside

We planted a cedar hedge this spring (4 months or so ago). The trees were fine this summer, some of them had one or two dried branches; nothing out of ordinary. At the end of the summer, some trees ...
4
votes
3answers
269 views

What's wrong with this Photinia fraseri tree?

I've got three Photinia fraseri trees in my yard in Tucson, Arizona. They were planted last May (2013) and now in September (2014), one of them is turning entirely brown and losing all its leaves (...
6
votes
2answers
127 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 ...
3
votes
1answer
748 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
2answers
767 views

Which species is this Eucalyptus?

I noticed this spectacularly blue Eucalyptus tree growing in Seattle (USDA zone 8). It is partially shaded by a large Douglas fir and a building. Does anyone know Eucalyptus well enough to identify ...
4
votes
3answers
792 views

Should I remove the suckers from the base of my new tree?

I bought a new tree this summer. Lately I've been seeing this little sprouts coming out of the very base of the tree. Should I chop them off or leave them? What will happen to them over time? Also, ...