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Acer shirasawanum 'Johin'

UBC Maple Forum - Sat, 20/06/2020 - 13:15
This summer has been particularly sunny and hot in my area. We have had daily highs above 30°C (86°F) for 90% of the days since July 1st, with many days above 35°C (95°F). It has been a testing time for Asian maples.
I would like to share the extraordinary behavior of Acer shirasawanum 'Johin' which is shown in the first two pics. It is in a wooden pot and is exposed to full sun all day next to the swimming pool. It has taken this heat and sun without any signs of leaf scorch...

Acer shirasawanum 'Johin'

Viable Acer Griseum (Paperbark) Seeds?

UBC Maple Forum - Thu, 18/06/2020 - 20:06
To start, I know paperbarks are difficult to propogate, that you'll only get a 5 to 10% germination rate from seeds. I've also read that most samaras will be empty if you crack them open hence the difficulty.

So I have a question about the samaras I picked from my tree. I have a very large bag I'd put in the freezer. I thawed them yestereday and this morning cracked open 5 or 6. Had they all been empty or dried up and shrivelled I was going to toss the bag.

Well, none were empty, 4 of them...

Viable Acer Griseum (Paperbark) Seeds?

Should I be worried by these blackened tips?

UBC Maple Forum - Thu, 18/06/2020 - 18:49
As per the subject.

Thank you.

How to plant Japanese maples in sandy soil

UBC Maple Forum - Wed, 17/06/2020 - 00:27
We hear a lot lately about planting trees and shrubs in the existing soil without amending a small circle because the roots will be reluctant to grow beyond the amended soil into the often less-fertile soil beyond. The caveat is that if the native soil is awful, you can replace it with something suitable - but that involves digging a large hole to accommodate future root growth.

So, to get to my question . . . would amending a fairly large area of sandy soil with sphagnum peat moss (say a...

How to plant Japanese maples in sandy soil

Too wet?

UBC Maple Forum - Tue, 16/06/2020 - 18:04
We have had a very, very wet spring here in East Tennessee, and several of my maples which were repotted into, what I thought, was better draining media in late winter have browning of the leaf tips as if they’ve been too dry, but I know that isn’t the case. I believe damage from too wet of roots can look similar to damage from being too dry. Does this appear to be the issue?

Can a Ukigumo be so green?

UBC Maple Forum - Tue, 16/06/2020 - 13:34
I saw this specimen today; 5 feet, healthy and nicely shaped. BUT I was not expecting to ever see such solid green for a U. (At this nursery it is in lots of shade).

So could it be a Ukigumo or is it likely mislabelled?

And say for argument sake it is a Ukigumo. What is the chances that it will remain as is ie all green "forever"?

Red Dragon JM trunk issue

UBC Maple Forum - Sun, 14/06/2020 - 21:44
New to this forum and look forward to learning from you all. I’m a Japanese Maple enthusiast in Dallas TX—have 43 of different varieties on my acre lot currently. Last fall I added this Red Dragon to the family (see pics). At the time of planting I didn’t notice any trunk damage, but in the last week or so I noticed bark peeling away from one side of the trunk. I’m familiar with squirrel damage from some of my other Japanese maples (dang rats with bushy tails!) but this doesn’t appear like...

Red Dragon JM trunk issue

Paperbark Maple

UBC Maple Forum - Sun, 14/06/2020 - 20:20
Hi, I wanted to post a picture of a maple seedling I found under my female mature tree to make sure it is a paperbark. I potted him this morning but right now he isn't looking too healthly. :(
My neighbour has an extremely large Norway and as we know, they are invasive so I wondered if this seedling is from my Acer Griseum.
I have about 8 other smaller seedlings but the leaves haven't split...I see on this bigger fellow that the first leaves on him aren't split either.

Paperbark Maple

Deceased Wilsons Pink Dwarf

UBC Maple Forum - Sat, 13/06/2020 - 16:57
I purchased one in the summer of 2019 and all was fine until this spring. When all of my other acers were growing leaves the Wilson's Pink Dwarf failed to grow many and any that did grow were shrivelled up. I pulled these dead leaves off hoping new ones would grow but, alas, the tree has now perished.

Any ideas what could have been the cause of this? The tree was in morning sunshine but afternoon shade.

2 x Acer identifications pls

UBC Maple Forum - Fri, 12/06/2020 - 21:40
1st (2 pics) is growing from my Acer Palmatum Garnet.

2nd (3 pics) is a new purchase but had no name on the label.


Megachile rotundata

UBC Maple Forum - Fri, 12/06/2020 - 20:15
This bee seems to like Acer cappadocicum :

View attachment 180432

I already noticed that last year, it's the only maple species I've spotted that on. I really don't mind, that means they're well and alive in my garden ;°)

FR : Megachile rotundata — Wikipédia
ENG : Megachile rotundata - Wikipedia

Since I don't use pesticides, I also have "black" bees, the native...

Megachile rotundata

Sherwood flame

UBC Maple Forum - Thu, 11/06/2020 - 10:48
Dear all

This is my first post :)

Firstly, let me congratulate you all on such a wonderful community. I've learnt so much browsing the forums recently!

I've always loved gardening and ever since we've entered the Covid 19 lockdown in UK, I've been spending soooo much time working in the garden....and have recently got more obsessed about JMs :D

I have 3 of them already: Atropurpureum, Orange Dream and some unknown one.

They're all around 5 years old and add great colour to the...

Sherwood flame

This has to be intentional - maple trunk damage

UBC Maple Forum - Wed, 10/06/2020 - 07:46
This is my SECOND tree that been getting this type of trunk damage to it. No way this was done by mother nature (animals, wind, etc).

Seems intentional.

Noticed this on my newly planted tree today. What's going on?

Just a month or so ago, similar damage was done to my Bloodgood maple.

This damaged looks fresh?
View attachment 180220

This happened a month ago.
View attachment 180221

Hopefully the tree survives. Almost half of the trunk "caldium" or whatchumacallit was trimmed off.

Ornamental samaras

UBC Maple Forum - Sun, 07/06/2020 - 07:57
Here are two trees in Stanley Park in Vancouver that have so many red samaras that they look like red-flowering trees from some small distance.

The first is an Acer palmatum of some sort. Leaves are around 7cm in length and width.
View attachment 179965 View attachment 179966 View attachment 179964

And here is an Acer pseudoplatanus. This species very common around here, but I needed help on this one, which looks so different from sycamore maples I've seen that I was sure...

Ornamental samaras

Japanese Maple, Black Spots on Cut Tree Limb

UBC Maple Forum - Sun, 07/06/2020 - 07:34
Hello all,

About a month ago we cut a dead branch off our Japanese Maple.

Looking at the exposed branch there are now some black spots (won't rub off) on the cut surface.

Is this anything to worry about? What is it? Recommendations are appreciated!!!!

Splitting Japanese maple

UBC Maple Forum - Sun, 07/06/2020 - 06:42
Hi I inherited a Japanese maple and noticed it is splitting. Can someone suggest a remedy for this guy? I can send a video or more pictures.

thank a lot!![
View attachment 179938 View attachment 179939 View attachment 179940

2019 seedlings

UBC Maple Forum - Thu, 04/06/2020 - 07:36
The two on the left are from the 2018 MS seeds exchange, I put those that didn't germinate in a pot in 2019 and I got these. The others were collected from various trees in a local arboretum but I couldn't label them, and anyway they don't look like the ones I saw there as far as I can remember :

View attachment 179683

Two more, UBC and local arboretum :

View attachment 179684

I have a couple of dozen more, A. tataricum - easy to identify, A. palmatum, more or less like the plain...

2019 seedlings

Acer circinatum not on Vancouver Island?

UBC Maple Forum - Wed, 03/06/2020 - 21:19
0soyoung said: I have one planted in my landscape that seeds prolificallyClick to expand... Does anyone know why Acer circinatum is almost non-existant on Vancouver Island? If you look on this E-Flora BC map, you can see that it grows prolifically on the BC mainland and in Washington State - but hardly at all on VI. I brought one with me when I moved to to the Island 14 years ago which has grown tall but never produces seeds. Very strange, wouldn't you agree?...

Acer circinatum not on Vancouver Island?


UBC Maple Forum - Mon, 01/06/2020 - 20:42
I purchased this tree on the weekend, it’s got very well established nebari, trunk is 5.5cm and root flare 10cm.It’s in a 15 litre pot, which is clearly too small. Whilst I often leave trees in the pot they arrive in until they have gone dormant, as per standard protocol, with potential root bound trees I tend to repot straight away so that it can form good root growth over the summer, I’ve never had an issue doing this.

Thoughts welcome, it wasn't cheap I dont want to kill it!


UBC Maple Forum - Mon, 01/06/2020 - 20:21
I went to a garden center this afternoon to buy flowers for my mother's balcony and I saw several maples labelled 'Extravaganza' (with 2 "Z"s I think). I tried both spellings in the search engine and got no return.

Has anyone heard of this before ? It's a bit like 'Shirazz', Geisha (with less pink variegation on the edges from the photos posted here) and other variegated cv.s
I made a quick search and it is apparently available from RHS plants or FlorAccess (for professionals)...



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