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Maple Forums on the UBC web-site

Advice about sick looking acer leaves

UBC Maple Forum - Mon, 27/07/2020 - 09:43
Hi all, new here and would really appreciate any advice from some more experienced gardeners.
I have this acer in my garden for about 8 years, it was tiny when first planted and I really like it.
Seeing this grow has really made me love acers and I am slowly buying more.
Not sure what type this is but see images below. The leaves look sick is there anything I need to do to protect this tree ?

Anyone have issues growing Acer palmatum 'Hupps Dwarf'?

UBC Maple Forum - Sun, 26/07/2020 - 09:20
Hi, does anyone have issues growing 'Hupps Dwarf'? Thanks.

A few questions about japanese maple

UBC Maple Forum - Sat, 25/07/2020 - 21:31
Hello all!

Loving being part of the forum :) I have a few questions about my Japanese Maple - Palmatum Atropurpureum

I bought last weekend to go in this lovely whisky barrel I was given by my mother in law. It's had lots of new growth already, some looks healthy, however some of it doesn't look so great. Hopefully you can see from the photos, any thoughts on this?

I wondered whether it's getting too much sun, it's in a south facing garden in a very well lit spot. When planted it...

A few questions about japanese maple

Identification of my 15 year old red dissectum

UBC Maple Forum - Sat, 25/07/2020 - 20:59
Hi,
I am new here in this forum and I have also no experience with forums yet. But I discovered this forum some days ago and joining it feels like going to `Maple Addicts Anonymous`.

I am from Austria near Vienna and though I planted some Japanese maples 15 years ago I had no expertise in this field and due to the birth of 3 kids in 3 following years also no time. Now I have started to devote more time to our garden and engaged myself in the world of Japanese maples. I recently bought...

Identification of my 15 year old red dissectum

Protect Potted Maples from Heavy Rain

UBC Maple Forum - Fri, 24/07/2020 - 19:21
I'm completely new to caring for plants. Having recently become "interested" in maples, but being the ruler of only a small, roof-less balcony, I am forced to stick to container gardening.

That is why I'm wondering, whether I need to protect my potted trees from heavy rain in any particular way? Or can I just ignore these heavy summer showers, like we had yesterday? Should I be worried if before that, I just watered some of my maples? The limp pose of my hackonechloa grass shown below says...

Protect Potted Maples from Heavy Rain

Is this Autumn Blaze Maple worth saving?

UBC Maple Forum - Fri, 24/07/2020 - 06:55
Hi guys, hope all of you are doing well in these crazy times. I know basically nothing about trees and would appreciate any thoughts on what is going on with the pictured Autumn Blaze Maple. I have done a lot of reading so far, and it looks like the tree was likely planted too deep, with the root flare was covered in mulch. So perhaps that explains most of the issue, but this tree has a sister roughly 30 yards away that was treated exactly the same way, and that tree is thriving. As you...

Is this Autumn Blaze Maple worth saving?

Defoliating maples

UBC Maple Forum - Wed, 22/07/2020 - 21:20
I posted a couple of messages that involved defoliation : it can be accidental (hot wether, lack of watering) or intentional (for bonsai growers and for various reasons).

For instance, this Acer palmatum 'Orange Dream' had leaf spots. At the same time, the leaves were bigger than I wanted, a second flush means smaller leaves. But basically, I was looking for a way to make it healthier :...

Defoliating maples

Any ideas what acer this leaf comes from?

UBC Maple Forum - Wed, 22/07/2020 - 08:35
It's a revert on an Osakazuki but has 8 lobes?

A sickly lace leaf

UBC Maple Forum - Wed, 22/07/2020 - 06:33
I have a 14 year old lace leaf maple in our courtyard Japanese garden. It started having problems about 3 years ago. I have tried everything I know to pull it out of its funk.

The leaf tips are singed and new growth is very limited. The bark on the branches doesn't look healthy. It's not brown green but whitish.

I live in Eastern Washington, which has hot and dry summers and cold winters. My soil is fine sandy loam that doesn't have much natural organic material but is nicely drained and...

A sickly lace leaf

Help with disease identification and treatment

UBC Maple Forum - Mon, 20/07/2020 - 18:51
Good afternoon, could anyone kindly help identify the diseases in my acers and suggest the best course of treatment.

I have an acer which has root rot problem as you can see from the photo 1, I have given it the first treatment with Hydrogen Peroxide yesterday but I am not sure if HP is the best course of treatment, the acer is a red palmatum and over 20 years old so it would be really sad if I loose it.

Also my other acers have lots of marks and while spots in the branches and trunk,...

Help with disease identification and treatment

ER : slip-potting

UBC Maple Forum - Mon, 20/07/2020 - 17:21
I lost my first Jerre-Swartcz after a rude winter. I was very happy with my new one, but me stupid moved it from 90% shade to 60% shade, except that it was in a place with no other maples, and I just fogot it for 2 or three days.

When I found it again, I was aghast : all the leaves were brown (but the sky was not gray). Stuoid me !

Well, when after a few days the leaves stick to the branch, no hope.

When when you pass your hand around the branches and the leaves fall, there's hope. It...

ER : slip-potting

looking for help with a cultivar ID

UBC Maple Forum - Sun, 19/07/2020 - 20:25
Someone in my neighborhood is looking to have this maple removed. I was considering giving it a new home. Any thoughts on the particular cultivar? Since I'm very new to this, I'm unsure of if it can be easily identified or if it could be one of several. Apologies for the low res photos

Bloodgood Alternative for Balcony

UBC Maple Forum - Sun, 19/07/2020 - 19:01
Is there some maple that has similar nice, deep red foilage, is more or less stable over the year, and with a similar shape as a Bloodgood but which does not grow as big/fast. Ideally, I'm searching for something which grows V style, with less leaves on the bottom and more concentration on to the top, and which I can keep in control, growing in a container on a east facing, roofless balcony (receives much light, will install shade cloth). I.e. it would be nice if it grew more upright then to...

Bloodgood Alternative for Balcony

Pine fines source

UBC Maple Forum - Sun, 19/07/2020 - 04:14
Does anyone have a source for pine fines they could recommend for me here in the states? I once bought a small bag online from some bonsai source, I believe it was called something like Bonsai Jack, and they were great. Perfect size and seemingly great quality. But I have far more trees now, and the bag was so little and pretty expensive. I’ve found a few bags at relatively local garden centers, but the quality is far from bonsai jack, which is to be expected as they are much cheaper....

Pine fines source

Washington post photo

UBC Maple Forum - Fri, 17/07/2020 - 19:37
Our dog never poses like that...

Silver maple and in-ground pool project

UBC Maple Forum - Fri, 17/07/2020 - 19:31
Good morning from Montreal - I am a new member to the UBC Botanical Garden and I have been directed to the Maple Forum.

I have a specific question about my silver maple which is about 4.5 ft in diameter.

What would be the safe distance from the trunk of the tree to dig for the installation of an in-ground pool? We want to preserve that tree forever as it is majestic in back our yard.

We have heard about the AirSpade technique for making a clean cut to the roots before the heavy machinery...

Silver maple and in-ground pool project

New member requesting help with identification of a JM

UBC Maple Forum - Fri, 17/07/2020 - 17:42
Hello. I'm a new member of the forum. My first post. Moved to Seattle a few years back and was luck enough to have a nice Japanese maple planted in the yard. My enjoyment of it has continued to grow and I've begun to expand my collection. I've added a Red Spider, Ukigumo, Shirazz and a Autumn Moon to my collection.

I'm writing to ask for help with identification of the tree that I didn't buy. Please see the attached photos. The photos showing more green/bronze color and were taken...

New member requesting help with identification of a JM

Culture and Propagation of Japanese Maple

UBC Maple Forum - Fri, 17/07/2020 - 11:49
Some may find the following information useful found in the attached PDF.

Title: Culture and Propagation of Japanese Maple
By: Guy Phillips
Professional Paper submitted to the Faculty of the Virginia Polytechnic Institute and State University in partial fulfillment of the requirements for the degree of
Master of Forestry

Table of Contents
-Introduction
-Japanese Maples: Value and Appeal
-General Culture
-Soils
-Climate / Microclimates
-Container Cultivation and Transplanting
-Economic...

Culture and Propagation of Japanese Maple

Powdery Mildew or something else on Japanese Maple??

UBC Maple Forum - Fri, 17/07/2020 - 07:25
View attachment 183892 View attachment 183891 Good evening folks ,

Over the past week or two I’ve noticed a mildew forming on some of the branches on my Tamuke-yama maple . The mildew is white and not thick and can easily be wiped off with a finger . The best way to describe it as a frosty effect . I’ve asked local garden centres who informed me it’s most likely powdery mildew and to use lime-sulfur but I’m hesitant for the reasons I don’t want to damage my tree it’s young , and I’m not...

Powdery Mildew or something else on Japanese Maple??

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