Why your Japanese maples die if overwatered

Discussion in 'Maples' started by whis4ey, Jul 11, 2008.

  1. whis4ey

    whis4ey Well-Known Member 10 Years

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    Northern Ireland
    When a plant becomes waterlogged and dies, it actually dies of dehydration. When the roots are submerged in water they get no air. When the roots get no air they die. But when the plant loses its roots it has no way of drawing up water into the plant to replace the water lost in transpiration from its leaves. Hence it dies from dehydration.
    That is why over-watered plants wilt in the same way as those that have not been watered enough, and it is difficult to tell which is the problem
    This is why plants need soil that allows little pockets of oxygen to co-exist with the root system i.e. a loose well draining medium
    For example ... plants can in fact grow in water if the water is kept oxygenated .... hydrophonics uses this principle
    Now ... what do you think of that?
    (personally I didn't know all this until a day or so ago, but I thought it was logical and true so I share it with you :))
  2. alex66

    alex66 Rising Contributor Maple Society 10 Years

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    ROME Italy zone9/b
    interesting question!i know that natural habitat of jm is mountain near small river,
    i presume that maples die if overwatered in lowland..
  3. mattlwfowler

    mattlwfowler Active Member Maple Society

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    South Carolina, USA
    It is also important to consider the root rot fungi that contribute to this as well. Phytopthera (sp?) and others feed on roots in the soil constantly, but when excess water is present they spread significantly faster by spores which causes a rapid decay of the root system. This is actually more common than pure drowning IMO.
  4. mr.shep

    mr.shep Well-Known Member 10 Years

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    San Joaquin Valley, California
    Sometime people in this forum should
    venture over to the UBC Citrus forum
    and spend some time reading up on why
    oxygen is so important in our soils, in
    our potting soil mixes and why waterlogged
    soils and soil compaction problems are
    some of our biggest nemesis to deal with
    in Citrus and Maple growing culture.

    We do not see too much water mold or
    dry rot issues with soils that have lots of
    aeration to them.

    There are several posts on CHC in the
    Citrus forum that provide some of the
    best insight online, mostly from Millet,
    as to why and how CHC can be a rather
    important, revolutionary in its own right,
    soil amendment for our potting mixes
    for growing palmatum type Maples. I
    have some issues with the CHC as to
    how well it will hold up in very warm
    and dry growing conditions and what
    changes we may have to make to better
    accommodate the usage of it. Then again
    I like using liquid forms of fertilizers
    only during the hot Summers for my
    container plants and herein is why
    I would want to experiment a little
    with the CHC hand mixed and added
    in with my soil mixes for Maples. It
    may seem outlandish but I sense we
    in Maples may be able to get a longer
    term benefit from the CHC than many
    of the Citrus growers will. We may
    have Maples grown long term inside
    a greenhouse again because of it..


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