Questions tagged [trees]

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

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4
votes
2answers
1k 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
3answers
966 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
3k 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.
7
votes
1answer
193 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." ...
8
votes
3answers
6k 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 ...
5
votes
1answer
373 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 ...
4
votes
1answer
431 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
4k 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
394 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
6k 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
769 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?
5
votes
1answer
148 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
votes
0answers
176 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 ...
10
votes
2answers
3k 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
3answers
5k 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 ...
6
votes
3answers
4k 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
1answer
777 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
67 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?
8
votes
1answer
5k 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 ...
14
votes
3answers
19k 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
votes
0answers
301 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.
7
votes
1answer
5k 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 ...
7
votes
1answer
593 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
2answers
93 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 ...
12
votes
1answer
1k 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
2k 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
64 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
217 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 ...
4
votes
1answer
2k 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
10k 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 ...
12
votes
1answer
2k 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 by ...
3
votes
2answers
440 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 ...
10
votes
1answer
2k 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 ...
5
votes
1answer
184 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, but ...
6
votes
2answers
1k 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
3k 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 ...
3
votes
1answer
724 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 ...
5
votes
3answers
798 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 (...
3
votes
1answer
3k 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 ...
4
votes
2answers
2k 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
4k 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, ...
4
votes
1answer
530 views

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
votes
1answer
263 views

Should I be concerned about twisted galls on my lombardy poplar trees?

We have lots of large twisted galls on our lombardy poplar trees' leaf stems. I've heard that twisted galls on poplar trees are not a threat to the tree. So, I'm not worried about them killing the ...
5
votes
1answer
102 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
votes
1answer
762 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 ...
3
votes
1answer
310 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 ...
15
votes
1answer
2k views

How do I know if a fertilizer treatment is burning my trees?

I started using fertilizer spikes on my dwarfed citrus trees in small pots. (Details may be found in this question.) As suggested, I used half a spike for each pot and I put the spike as far from ...
1
vote
1answer
147 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 (...
4
votes
2answers
142 views

What's the most hardy red fleshed apple for the Pacific Northwest?

I had two wonderful red fleshed apples in Birch Bay, Washington. We've moved to St. Helens, Oregon and I can't find any here. I'd love to replace them. Does anyone know where I might find these and ...
8
votes
3answers
713 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 ...