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

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4
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2answers
107 views

Are some varieties of Paulownia sterile?

Is it true that some varieties of Paulownia are sterile? And if so, where are they sold?
4
votes
1answer
417 views

What is the root span of Dwarf Southern Magnolia 'Little Gem'?

I can't seem to find any consistent information on the root structure of these guys. We were given one as a housewarming gift and would like to get it into the ground as soon as possible, however I'm ...
3
votes
2answers
861 views

Is it okay to grow English ivy on the base of a tree trunk?

In one place in the yard, there is a carpet of ivy under a black walnut. Would it harm the tree in any way to let the ivy up to the base of the branches? I would like to do this so that the whole ...
8
votes
1answer
215 views

Are there any tips for helping unhealthy trees?

My new yard has a lot of trees, probably 20-30. There are apple, pear, peach, pine, plum, and a few others. Most of them are fairly old (50+ years). Some of them don't seem to be very healthy (dead ...
5
votes
1answer
555 views

Mushrooms in mulch: that's OK, right?

We gave up on grass for much of our front yard after a disastrously hot and dry summer last year. (I couldn't morally live with the idea of soaking the yard with enough water to keep the grass alive, ...
5
votes
2answers
99 views

How do I start tree seeds?

I've got some thornless honeylocust seeds (about 20). They've been stratified, and I'm ready to plant, but I'm not sure what the best approach is. I haven't started trees from seed before. Will they ...
3
votes
3answers
468 views

How to protect against my neighbour's trees

My neighbor has planted a row of pine trees along our boundary. The trees (perhaps 10 of them) will grow to 14m tall, yet are barely 4m from my house (and 2.5m from his). The ground is heavy with ...
11
votes
1answer
242 views

How are Japanese Maple Trees cultivated?

I have mature Japanese maple trees in my yard that are extremely fertile. I find dozens, if not hundreds of saplings all over the yard. Some have even grown several feet tall. Is there a way I can ...
13
votes
1answer
891 views

What are the ideal soil conditions for planting giant sequoia saplings?

I've already germinated giant sequoia (Sequoiadendron giganteum) seeds for 6 weeks. What's the ideal soil conditions for planting the saplings?
13
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1answer
461 views

What are these red cocoons in my trees leaves?

The tree In my garden as lots of red cocoons on its leaves, I assume these are insects, do I need to be concerned or are they harmless?
8
votes
1answer
308 views

Should the aerial roots be trimmed on my ficus tree?

I have a couple 3 foot tall ficus trees which have some thin aerial roots descending from the branches. I keep both indoors, and they do not get a lot of sunlight. However, when I purchased them 2 ...
4
votes
1answer
2k views

Is it a good idea to build a paver patio near a large established tree?

I would like to build a paver patio next to a large tree that has a 3" wide root at ground level. I do not want to damage the roots of the tree, so it seems like my only option is to build a raised ...
6
votes
2answers
201 views

How do I use sassafras?

I have a lot of sassafras growing, and they drop a lot of branches. I have been piling them up and burning them, and using the ashes in the garden. Is there a way to use the branches like propagation ...
2
votes
2answers
419 views

What is wrong with this Norway spruce?

This Spruce tree is very odd. I have a few questions about it. First of all, how did the branch segment pictured below grow there? It grows right out of the smaller trunk into the larger one, without ...
6
votes
1answer
529 views

Is it possible to graft fruit/flowering trees onto a well established jacaranda tree?

I have a large jacaranda tree in my front yard (perhaps 30-50 yrs old). I recently pruned a few branches that were about 2" thick. You can see one fresh cut in the picture below and there are a few ...
7
votes
1answer
91 views

Can multiple arborvitaes be made to grow uniformly to the same height?

Arborvitaes grown in rows often grow unevenly with some growing twice as much as others of the same age and with the same care. Is it possible to prevent this, and make all the trees in one row look ...
7
votes
1answer
143 views

What problems can come from a tree with its graft union 5 inches above the soil line?

I planted a grafted apple tree in a pot and shortly thereafter realized the graft union is about 5-6 inches above the soil line. My gardening books and online searches recommend the union be no more ...
8
votes
1answer
1k views

Is there any cure or treatment for a queen palm tree diagnosed with fusarium decline?

A "certified arborist" looked at the tree (>20ft high) and determined that this was the cause. Some of the fronds in the tree seem frozen in place, while most have actually drooped down completely ...
11
votes
3answers
1k views

Is it possible to indefinitely limit the growth of trees, hedges, and shrubs?

Now that I've lived in my very nicely landscaped first home for over 10 years, I have several "overgrown" trees, hedges, and shrubs (mostly, but not all evergreens) in my landscaping, and at this ...
4
votes
1answer
941 views

What is the best way to keep a tree growing straight?

When most trees get over ten feet tall, they seem to be trying to grow every way but up. Staking would be impractical because of scale, and pruning often helps but does not force the tree to grow up. ...
11
votes
2answers
1k views

Will it kill my potted tree if I use tree fertilizer spikes?

I recently bought some tree fertilizer spikes to feed my potted dwarf kumquat and lime trees. After I got them home, I read the following warning on the side of the box: NOTE: Never apply within 30" ...
6
votes
1answer
2k views

Why didn't my maple leaves change color in the fall after transplanting?

I just bought and planted an October Glory maple sapling with a trunk about 1.5" in diameter. I did everything the nursery worker told me to while transplanting it: I dug a hole twice as wide as the ...
5
votes
2answers
795 views

What time of year to mulch/feed trees?

This answer recommends putting down a layer of compost mulch in the fall in order to slowly feed the tree. (In addition to the unmentioned weed control and moisture regulation.) It makes sense to me ...
15
votes
5answers
400 views

How can I naturally encourage birds into my garden?

We love having our garden filled with birds, thus we have put up a variety of bird feeders. We also make lots of water available for the birds. The result is a 2½ year old that can identify about ...
4
votes
1answer
107 views

How can I limit my Norway Spruce to one top (trunk)?

I have a Norway spruce that is about sixty feet tall and is beginning a second trunk. I like them to have only one top, but this particular tree is not climbable. How do I control this?
10
votes
1answer
582 views

Damaged Tree Heather: can it survive?

I have a tree heather (Erica arborea) in my rockery (acid soil) which I grew from a seedling about twenty years ago. Until it was severely damaged by a prolonged freeze-up last winter, it was about ...
10
votes
1answer
129 views

How should I choose which trees to cull?

I harvest firewood from a small woodlot behind my house. I almost exclusively cut "culls" -- dead, dying, or diseased trees that aren't going to yield much additional wood in the future anyway. My ...
13
votes
2answers
992 views

How do I prevent the seeds on my Japanese Maple from falling off?

I have a 6 ft tall 'Bloodgood' Japanese Maple in my yard. It gets a lot of afternoon Californian sun, but the leaves are a nice color and are healthy. I wanted to collect some seeds this fall (to try ...
16
votes
2answers
1k views

Will dumping paint destroy a nearby tree?

One of my neighbors complained that another neighbor killed a tree in front of her home by dumping paint in the soil. (Never mind that his trees are fine and there seems no way the paint could be ...
10
votes
2answers
1k views

How can I control Viburnum Beetle on my Snowball tree?

I have a mature Snowball tree (Viburnum opulus) that is stripped of its leaves and severely weakened several times a year by the viburnum beetle. The Royal Horticultural Society recommend several ...
9
votes
1answer
2k views

How can I grow maple trees from seeds?

I have a mature maple tree in my yard. Every year it drops seeds which start growing in the most inconvenient of places, like my gutters. Next season I would like to actively cultivate these seeds and ...
9
votes
1answer
1k views

What's the fastest-growing variety of cherry tree?

I really want to add a tree to my garden, but logistics and budget demand that I plant a sapling and nurture it into a healthy tree. I really like cherry blossom, so a cherry tree would be ideal. ...
6
votes
1answer
1k views

How I can persuade an olive tree to flower?

I have an olive tree that was a mail order gift about four years ago. Unusually for mail-order florist "living plant" deliveries, this one has survived more than a few months! It came with two olives ...
12
votes
1answer
1k views

Best help for a tree with stunted growth?

I have a few trees on my property which are at least five years old (sorry I don't know the kinds yet). Compared to other trees in neighboring lots, planted at the same age at the same time, they are ...