Help caring for Acer Japonicum Aconitifolium

Discussion in 'Maples' started by Lisa Harry, Jul 15, 2020.

  1. Lisa Harry

    Lisa Harry Member

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    Hey @Luke’s Maples @Acerholic @emery here are some updates pics of my tree that is a concern. We have had 4-5 days of good weather (they now call it a heat wave, only in Vancouver when you have two months of rain does 5 days of sun in the summer equate to a heat wave- hilarious!). None the less we went from cool wet to sunny and 30 Celsius, no transition just a shock. The tree has new growth which has been happening for a while. It is properly watered I feel. I only water in the morning (4:30am) if I know it’s going to be a Hot day and if I stick my finger a few inches in the soil And it comes out Mostly clean, will I water. I will mist at night if it’s been hot but I want to wait to water in the morning. I noticed some slimy moss on one side Of the top of the soil so i removed it, strange thing is, that’s the same side that has the leaves with a heavy curling. The rest of the tree is off colour but no significant curling. Do you think there is a root issue or possibly wind burn To the leaves and No connection to the soil.
     

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  2. Lisa Harry

    Lisa Harry Member

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    Here is a full picture of the tree today
     

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  3. Acerholic

    Acerholic Esteemed Contributor Forums Moderator Maple Society

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    @Lisa Harry, good morning Lisa, IMO this tree needs re potting, it has the look of being pot bound. I think that if you lifted it out. You would see a mass of roots and no soil / compost.
    You could slip pot it at this time of the year into a larger pot, or in the Autumn do a root prune and fresh potting medium. This will be a heavy job as the pot is a glazed, it may also only come out with breaking it unfortunately due to its shape. If you want to keep it in this pot and you get it out without damage , a root prune is the only way to add the medium and reinvigorate this maple for next season.

    Any work done now and in the coming weeks is all for next Spring etc, you are not going to improve the aesthetics this year. It is getting a bit late for new growth.
    After repotting do give this tree as much protection from the sun as possible, especially in August and give it support. It is a top heavy tree that needs some help from strong winds.
    Hope this has pointed you in the right direction of what I think you should do Lisa.
     
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  4. Lisa Harry

    Lisa Harry Member

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    Thanks again @Acerholic you think it would be pot bound already? I slip potted this in may this year it was severely pot bound, but this New pot was 3 inches on all sides larger and deeper. maybe it was so pot bound it hasn’t stretched out in this new pot but just keeps twisting into itself? I have found a new place that I think it will much prefer I just have to move it there and convince someone to help me. I don’t want to keep it in this pot I want to put it into something that will make root pruning easier and have a wider base.
     
  5. Acerholic

    Acerholic Esteemed Contributor Forums Moderator Maple Society

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    @Lisa Harry, good afternoon Lisa, then there is a good chance the roots have not taken into the new compost. As you say round and round, that can be a problem when slip potting. I do definatly think that this tree needs an Autumn root prune and re pot. Or it has been scorched by being in the direct sun after you repotted it in the Spring. It does look very sun exposed in that position. I always place mine in shelter especially after repotting.
    Either way, aesthetically I dont think you are going to get anything out of this tree this year now, I'm afraid.
    Time to plan for 2021 with this one. Definatly move it into more shade if that is possible Lisa. It really does not like it there. The delicate new roots will bake where it is.
    Sorry I don't have any quick fix ideas for you.
     
  6. AlainK

    AlainK Generous Contributor Forums Moderator Maple Society 10 Years

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    That might be the case. I also think repotting would do it good, either after leaf fall if your winters are not too harsh, or preferably in late winter/early spring when buds start to swell. When done in late February/early March (here), that's the best, and you can prune the roots rather drastically without much risk.

    If your winters are very cold, an option would be to dig a hole in your garden, remove the tree from the pot without messing too much with the roots and putting the tree in that hole with a very sandy soil. then you can uproot it, prune the roots and put it in the right pot with the right mix.

    This is what we call "mettre en jauge", that's for trees that must wait before being planted at the right time. If anyone knows how to translate it into English, I'd be grateful, the translations I found online were not really satisfactory... ;°)
     
    Last edited: Jul 28, 2020
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  7. Lisa Harry

    Lisa Harry Member

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    Ok thanks @Acerholic and @AlainK I can re plant this fall, I can probably relocate it before that. I believe @Luke’s Maples gave a suggestion for soil mix I’ll have to go look it up again. So wait until the leaves all fall off then Root prune and change pot, Id like one that’s better for regular root pruning. Should I add a transplant fertilizer when doing this? My winters are typically not too cold we get between 2-4 decent snow falls that are normally wet and heavy. Our cold is very damp. Not often below 10 degrees Celsius. I had plans on wrapping the pots during winter with a flexible foam insulation. Our winters are normally dark and wet between late October and May. Our snow is typically January/ February. I believe we are an 8b, I’d have to double check. Thanks for the help.
     
  8. kbguess

    kbguess Active Member 10 Years

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    "mettre en jauge" is maybe the equivalent process of "heeling in?"
     
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  9. AlainK

    AlainK Generous Contributor Forums Moderator Maple Society 10 Years

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  10. Lisa Harry

    Lisa Harry Member

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    Hi @Acerholic so I convinced my partner to move the “rescue tree” with me to a new hopefully more suitable locations. Here are some pictures of it’s new spot. Please excuse the poor condition of the back yard I do have some hard landscaping being done in the fall. My front yard was a major project and using the back as storage destroyed it. Plus I work 6 days a week on average so hard to make “beautiful” this season. Previously this tree had full sun from 6am to roughly 5/6pm accompanied by a respectable breeze. Now it has that morning sun 830am then A filtered sun/ shade around noon then more evening sun about 4:30/5pm for about 2 hours. Let me know your thoughts. The first picture is take at 08:30 the 2nd at 1pm and the last at 5pm. Thanks
     

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  11. Acerholic

    Acerholic Esteemed Contributor Forums Moderator Maple Society

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    @Lisa Harry, good morning Lisa. Your tree is going to be a lot happier in that location, especially seeing the large trees behind giving it some protection from the thing maples hate the most and that is direct sun and wind. I like the fact that even when the sun is at it's hottest around 5pm, it still has dappled light.
    Always remember that maples are an understory tree, if you keep that in mind for any planting, it is hard to go wrong.
    A good move Lisa, next season you will see such a difference.
     
  12. Lisa Harry

    Lisa Harry Member

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    Thanks @Acerholic i really hope it does better. I’ll try to root prune it in fall when it’s leaves fall?
     
  13. Acerholic

    Acerholic Esteemed Contributor Forums Moderator Maple Society

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    @Lisa Harry, excellent idea Lisa, do post photos of how you get on.
     

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