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saving my chinese elm...

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Old 22-Feb-2007   #1
jackied
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saving my chinese elm...

Am all new to this!
I bought a little chinese elm bonsai on impulse, as you do. I read a bit, which warned hugely against overwatering, so I didn't. I underwatered. Its leaves went crispy.

I read some more. I watered very carefully and I think some leaves are growing back. I inspected the rootball, which seemed horribly congested and the remaining soil nothing but sand. So I potted it up in a slightly bigger pot with fresh bought bonsai compost. I am also starting to train some little ficus plants as bonsai and I root pruned them and potted them up in it too. That was earlier this week.

Then I got another bonsai book and read some more! I think the compost I bought is very spongy and peaty. My gut feeling is that the ficus will be fine in it (they were growing in ordinary peat based compost before so it will be what they are used to) but that it may be too soggy for the elm.

Should I knock all the compost off again and repot it again, or leave it to rest and regrow for a bit and just be very careful not to over-water it in the meantime?
The plant, by the way, is on the coolest windowsill in the house.

Thanks very much

Jackie
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Old 22-Feb-2007   #2
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Leave it for now. Water it well, then let it get somewhat dry before watering again. You can stick your finger, or a chop stick, into the soil to see how damp it is at the bottom. You want it to be as damp as a wrung-out towel, but when you do water it, you want to give it enough water that it runs out of the drainage holes for a minute or so. In other words, flush it with water.

Hope this helps!

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Old 22-Feb-2007   #3
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If you have a fast draining soil you will eliminate overwatering issues. Generally, soils are made up of a combination or organic and inorganic components that are sifted for size. Do a search on this forum on soils to get a start on what is considered good soil. Compost right out of your bin, or out of the nursery bag is not good. It will contain to many fines, stay to wet, and restrict oxygentation.
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Old 22-Feb-2007   #4
malik
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Hello Jackie,

It sounds to me like you are experiencing a common fact about bonsai.....you are going to read a lot of contradicting facts about Bonsai! Everyone is going to give you a different answer about the same subject. Thank God that bonsai has a basic truth about it's cultivation. Here is what you need to know.

About repotting: Everytime you repot a tree you shock it. If you did any root pruning then the level of shock was more intense. If you recently transplanted the elm, then leave it alone for a while and be careful to only water when it is slightly dry. You can observe this by sticking a toothpick into the soil and checking every other day or so. When the pick is drying out then it is time to water. For now, let the tree rest and you will see it producing new growth sooner or later. Also, since the roots have been disturbed, they will not be absorbing as much water. This is why it is best to mist the elm so that it can obtain the water it needs through the leaves.

About the soil: I have never heard of "bonsai compost". In fact, i would think traditional bonsai soil mixes and compost contradict each other. Bonsai soils tend to be fast draining while compost retain much more water for longer periods of time. The ficus can grow in many different soils, but the elm might not like so much water retention. The next time you repot, use more of an inorganic mix. I use a mix of equal parts turface, lava rock, and pine bark.

About location: As soon as the temps warm up you need to place the tree outside if you can. Sure elms can be semi-deciduous, but even indoor bonsai benefit a lot from staying outside during the warmer months. Especially in your elms condition, it will need a more natural enviroment to get well faster.

Hope this was some help.
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