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

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5
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2answers
43 views

white material on roots of apple tree?

When I dug up a young apple tree to move it to a sunnier location, I noticed some sort of white material on the roots. Is this cause for concern?
5
votes
3answers
145 views

What is this large, woody plant with compound leaves, found in zone 6a?

In the early summer of 2014, I was on vacation in Pine Grove (PA), and saw this large plant by the side of the road. It is huge. For scale, the pokeweed in the pic is about 7' tall. This weed is ...
3
votes
1answer
29 views

Index of photoperiods

I planted a Sequoiadendron giganteum (Giant Redwood) sapling today, and I was wondering how many hours of daylight the little guy needs. I found this answer, which mentioned photoperiods of different ...
12
votes
3answers
19k views

Can I grow a pistachio tree from seed?

I live in Las Vegas, Nevada. So I know I have the right soil and conditions to grow pistachio trees. But can I just plant a pistachio seed and grow a tree or do I have to go buy the tree?
6
votes
1answer
46 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 ...
20
votes
5answers
3k views

What is a fast-growing deciduous tree for shading house in summer? (Long Island, NY)

My town recently took down a large 80 year old maple tree that sat on the south side of my house. Unfortunately that tree provided much-needed shade and now I have already noticed very high ...
3
votes
2answers
139 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
59 views

Can I allow a pine tree to share root space with a group of birch trees? If not, which should I cut down?

I have a group of birch trees, with a pine growing in the midst of them, in my front yard. My friend is telling me the pine must be cut down to save the birches. I see her concern, however: I think ...
5
votes
2answers
177 views

How can I help my young mulberry tree grow a thicker stem?

I have my young mulberry tree, which is a little more than a year old. I grew it from a seed, and have it indoors in a large pot at the moment. It is growing tall and thin, needs a stick to support ...
3
votes
2answers
40 views

How should I deal with carpenter ant damage on my old almond tree?

I have an almond tree on a house I purchased. The tree looks very old and the large bulk of it didn't have much green - looked very dead. It was growing sideways and near the base of the tree some new ...
2
votes
3answers
48 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?) ...
5
votes
1answer
100 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.
18
votes
4answers
552 views

How is an Avocado plant started?

I find ourselves buying one or two Avocados twice a week. It's one of these things that I've been wanting to do for a long time: grow an avacado plant. What is the ideal climate or exposure to ...
4
votes
1answer
65 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." ...
4
votes
1answer
58 views

Why are my avocado's leaves drying out from the 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 ...
8
votes
1answer
509 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 ...
6
votes
3answers
284 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 ...
3
votes
1answer
27 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 ...
6
votes
2answers
2k 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 ...
-2
votes
1answer
50 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
44 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 ...
3
votes
1answer
57 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 ...
1
vote
1answer
258 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 ...
3
votes
2answers
154 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 ...
4
votes
2answers
69 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
46 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
3answers
153 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
43 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
46 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
48 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 ...
7
votes
2answers
163 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
112 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
39 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 ...
5
votes
4answers
219 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 ...
3
votes
3answers
68 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 ...
1
vote
2answers
54 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?
4
votes
2answers
62 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 ...
5
votes
1answer
102 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 ...
8
votes
3answers
5k 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
97 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
167 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 ...
5
votes
1answer
52 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
78 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 ...
3
votes
1answer
33 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 ...
4
votes
3answers
57 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
2answers
5k views

Why is my pine tree turning brown?

I have 4 pine trees (not sure the type but they look like Christmas trees) in my back yard. They were planted at the end of May by the people that we bought the house from. One of them has turned ...
9
votes
1answer
475 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 ...
3
votes
2answers
111 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 ...
3
votes
1answer
198 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?