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Maple Forums on the UBC web-site

The Dark Side of Propagating Maples

UBC Maple Forum - 11 hours 20 min ago
I've just discovered this method of propagation for Acer grandidendatum. I wonder how it could work for other maple species :

The Dark Side of Propagating Maples

Excerpt :

"In an effort to save the genetics of this tree from marauding squirrels, we are using propagation techniques pioneered by researchers at Utah State University. This species is usually very hard to propagate by cuttings, but by placing dark...

The Dark Side of Propagating Maples

Fertilizing Japanese Maples

UBC Maple Forum - Sat, 15/02/2020 - 01:27
Maybe I haven't been paying attention but I don't remember seeing much advice on this forum about fertilizing Japanese maples. The best thing I can say about the soil mine are growing in is that it drains well, with rock and sand under barely a foot of 'proper' soil. There can't be many nutrients available although I don't see any problems with the trees that would indicate a deficiency. Should I be fertilizing proactively as part of a regular mainenance plan? If the answer is 'yes' what...

Fertilizing Japanese Maples

Peter Gregory, 1929 - 2020

UBC Maple Forum - Thu, 13/02/2020 - 11:56
Peter Gregory has died at age 90.

Co-founder of the Maple Society and for many years its Chairman and Editor of the Newsletter, Superintendent of Westonbirt Arboretum, author of revisions to J.D. Vertrees "Japanese Maples", co-author of the "World Checklist of Maple Cultivars", Peter was surely one of the greatest maple experts in the world, as well as one of the best loved.

For a fuller tribute to Peter please follow the link below....

Peter Gregory, 1929 - 2020

JM buds opening!

UBC Maple Forum - Tue, 11/02/2020 - 00:11
I have a 4.5 foot potted J.Aconitifolium that seems to be opening its upper most buds.. it’s been unusually mild here in the UK this year, hardly any frosts in my central area, so far.. very strange..and worrying if we get late frosts.

I’ll move it to a very sheltered spot.. anyone else experiencing this?

Acer palmatum and wind tolerance

UBC Maple Forum - Sat, 08/02/2020 - 20:46
Hi from Ireland
I have a question regarding Acer palmatum and wind tolerance. I have started a small collection but some of our garden is open to prevailing south westerly winds.We are inland so no salt and our climate is fairly moist, little or no hot dry breezes. Winters are mild rarely below -5.we can get late frost however. I have read mostly that they don't like wind but one noted grower from England says otherwise. My question is out of the following which, if any, can tolerate an...

Acer palmatum and wind tolerance

Maple Society OSI: Limitations and Possibilities for Growing Maples in Poland, by J.W. Tumilowicz

UBC Maple Forum - Sun, 02/02/2020 - 20:29
A first digital edition!

Limitations and Possibilities for Growing Native and Exotic Maples in Poland. By Jerzy W. Tumilowicz, Warsaw Agricultural University, Rogów Arboretum.

This article, reintroduced from the 2002 International Maple Symposium Proceedings by the Maple Society Open Science Initiative, is now available for the first time in digital format. It will by of interest to all growing maples in the challenging colder climate zones, like the US mid-west or Northern and Eastern...

Maple Society OSI: Limitations and Possibilities for Growing Maples in Poland, by J.W. Tumilowicz

Seeds 2020

UBC Maple Forum - Thu, 16/01/2020 - 16:35
I finally received the seeds from the Maple Society. I want to thank all those who collected, sorted them, put them in paper bags and posted them : thank you very much for the time and efforts spent.

Now it's up to me to find the best way to make the best of this seeds galore ;-)

View attachment 170552

PS: I had put some of my own seeds from A. palmatum palmatum directly in a ziplock bag that I put in the fridge on Dec. 5th after having soaked them overnight in water, and two days...

Seeds 2020

Need help to access to the members area?

UBC Maple Forum - Thu, 16/01/2020 - 16:16
If you are a member of the Maple Society and don't know how to access the members area, post your questions in this thread. For information on how to access the members area, see For Maple Society Members

For Maple Society Members

UBC Maple Forum - Tue, 14/01/2020 - 19:09
If you are a member in good standing with The Maple Society, you can sign up for "The Maple Society" usergroup. This gives you access to a private forum where participation is reserved for Maple Society members.

How to Join the Maple Society: Fill out one of the forms on the Maple Society website

How to Sign Up for the Maple Society forums usergroup:...

For Maple Society Members

Acer (?) id

UBC Maple Forum - Tue, 14/01/2020 - 18:41
Good evening,

I've been told this is a dwarf Acer plant. Is it so, and does anyone happen to know which particular variety it is? Bought in Macedonia, Greece. Leaves went a bit more red before falling in autumn. Pics are from summer. I notice that toward the end of summer the leaves seem a bit greener. Many thanks for your suggestions.

Flower Season is almost here!

UBC Maple Forum - Wed, 08/01/2020 - 19:10
In celebration of our forum having doubled our allowable pictures per post -- that's right, 20 pictures now allowed! -- here are 20 pictures of maples in flower. Can you guess the species/cultivar? I'm not sure I'd get them all right!


View attachment 170471 View attachment 170472 View attachment 170473 View attachment 170474 View attachment 170475 View attachment 170476 View attachment 170477 View attachment 170478 View attachment 170479 View attachment 170480 ...

Flower Season is almost here!

Truncatum VS Mono Germination

UBC Maple Forum - Fri, 03/01/2020 - 07:33
Hi, I have grown lots of Acer mono and Acer truncatum so my practical experience tells me these species are different. Their germination habits demonstrate this. Truncatum has an unusual feature of hypogeal germination, that is the cotyledons do not emerge from within the seed - it just pops out of the soil with its first two leaves. Mono should have 'normal' epigeal germination with cotyledons emerging from the seed and the ground.

However I am stumped to find this documented (from behind...

Truncatum VS Mono Germination

Filigree or Flavescens?

UBC Maple Forum - Mon, 30/12/2019 - 00:23
Hi everyone, I hope you all had a great Christmas.

I am looking at getting a new green dissectum for my garden and there are a few that I do not know much about. I already have a 'normal' green dissectum, which is lovely in Autumn but not so interesting during the rest of the year.

Could someone advise me on the differences between the green varieties. The two I think I like the most are Filigree and Flavescens which I believe have brighter colours in Spring. Also viridis and Waterfall...

Filigree or Flavescens?

JM bleeding...

UBC Maple Forum - Sat, 28/12/2019 - 20:09
Hi, Last week I went out and did a light pruning for those unwanted branches. After the next few days, I started to see some type of fluid bleeding from those cut.
Is this normal for the tree to bleed before healing those wounds or i should wait until later into winter or early spring to prune. The current temp is around hi-40 and lo-50. Perhaps these trees are not going to dormant yet. I hope I didn't hurt them too much.
Any advice is much appreciated. Thanks,

Evergreen Maples at Christmas

UBC Maple Forum - Fri, 27/12/2019 - 18:44
It's always a bit of fun to see which maples are evergreen as we pass through the solstice. It's not always the same group here in the Norman season of mud.

This year many maples are having a hard time getting the sap down: pruning over the last week has cause quite a lot of bleeding on sycamores and anything from Section Palmata. The Platanoidae are nice and dry though.

Anyone else have any maples still in leaf? I wonder what's still green at the UBC botanical garden...

Here are A....

Evergreen Maples at Christmas

Winter Damage - thoughts?

UBC Maple Forum - Fri, 06/12/2019 - 14:19
Hello all. We had a bad storm this week in NJ that produced sleet and ice before snow accumulation. The ice and snow weight ended up snapping the main runner of my new Sango Kaku (coral bark). I have attached two pictures. How will the tree react to the damage? Is it salvageable or will I need to replace it? Will growth be hindered now if it lives?

Thanks for your help!

Anybody seeing any early colour change?

UBC Maple Forum - Tue, 03/12/2019 - 01:35
As I was driving up to my house a few days ago I noticed this leaf on my Osakazuki. People often talk about how stunning the fall colours are on this cultivar and I have to admit that that mine is living up to my expectations.

I will try and take some more pics tomorrow.

Could this be a shirasawanum?

UBC Maple Forum - Sat, 30/11/2019 - 03:46
Found this tree this fall on my maple exploring mission without a label. Could this be a shirasawanum?

Acer palmatum variety to Zone 10?

UBC Maple Forum - Mon, 25/11/2019 - 21:19
I would like to know cultivars names or varieties of palmatums that support zone 10. In my city aprox. 40º C in Agost, although I have semi-shadows places to put in.

In this moment I have an Acer palmatum atropurpureum and other no palmatums like acer pseudoplatanus or acer opalus sub. granantensis.

Thanks in advance.


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