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3 Days Ago
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#1 |
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bonsaiTALK Neophyte
Join Date: Apr-2008
Posts: 4
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Chinese Elm problem - repotting is the answer?
Hi All,
I have two Chinese Elm 'mallsai' and both have leaves which are starting to yellow slightly - one more so than the other. I keep them outside and the sun isnt too strong on them yet. Could the problem be the medium they are potted in? When I water (& give them a good watering) and slightly lift the tree out of the pot the soil is still very dry, the soil is an orgainc material and is very clay like. I think Chinese Elms need to be repotted in early spring - have I missed the boat? Or could I get away with repotting them in an inorganic material now? Or could there be another reason for this? It can be quite windy in back garden but they do have fairly good shelter. Any recommendations / opinions welcome guys! Cheers |
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Chinese Elm problem - repotting is the answer? |
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3 Days Ago
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#2 |
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bonsaiTALK Master Chief
Join Date: Mar-2006
Location: West Springfield Massachusetts
Country: USA
USDA Zone: zone 5
Posts: 1,093
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Sounds like you are barking up the right tree, between possibly being rootbound and clay it seems the water is running out around the soil and out the bottom.
Although it should be done before leaf out I think I would look at an as easy of a repot you can, loosening the old soil so the water can get into the root ball. You need to be carefull though, with new soil the water can still avoid the clayed in rootball, hence loosen the clay ball, also the opposite water can run thru making you think it's draining well but keeping the clay (where the roots are) wet. Did this this get fairly dried out as in maybe missed a watering, often as some soils dry out it can be very difficult to rewet them without soaking the whole rootball and soil(ie mallsai instruction for watering).
__________________
If at first you don't succeed -- skydiving is not for you. Always remember that you're unique -- just like everyone else Enjoy this day. Bill |
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3 Days Ago
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#3 |
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10 years of bad pruning..
Join Date: Apr-2008
Location: denver co
Country: US
Posts: 72
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repot. i think it's way better to repot a little late than try to grow it in that mallsai crap for another year!
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-chris- |
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2 Days Ago
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#4 |
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Wanna-B/onsai
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Repotting at this time shouldn't be problematic for you and it's a good idea to get it out of that loamy/clay soil it's in. That said, the yellowing of some of the leaves could be unrelated to the soil. Are the leaves themselves browning or are they yellow with little flecks of green that seems to be leeching out of them? If they're brown then it's probably the soil. If they're yellow with remnants of the green chlorophyl draining away it could be indicative of chlorosis which can be caused by a couple of things. I know for my elms the leaves yellowed from Black Spot fungus. Avoiding the new spring leaves when you water will help avoid Black Spot (you can usually tell it's Black Spot, because, like the name implies, the leaves have little black, mottled spots). Try repotting first and avoid water on the new growth until it's had some time to harden off. If you're still getting yellowing leaves after a month or so, you might want to consider fungicide drench (Daconil is supposed to be good -- can't get it here unfortunately).
Best of luck, Jeremy |
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