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Repotting a cymbidium

This is a discussion on Repotting a cymbidium within the General Orchid Culture forums, part of the Orchid Culture category; Today on the menu there is this cymbidium... Obvious signs that there is a problem ...

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  1. #1
    Nordic's Avatar
    Nordic is offline Member
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    Nico Daneel
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    Default Repotting a cymbidium

    Today on the menu there is this cymbidium...
    Obvious signs that there is a problem with the medium is yellowed and browned leaf tips not just at the very top, were you'd expect sunburn.

    Also the medium looks all compacted and is blocked by sand and stays moist enough for clover to grow in. (this is an outside 'chid).

    Also it is just past flowering so an ideal time in mid spring.



    I let it outside in the sun for a few days (was not too hot this week), which helped to get it out of the pot easily.



    Adjusting the hosepipe sprayer to a low power beam I rinsed off the sand.
    Eventualy you will see some "open" spots through wich you can nudge the medium stuck in the centre. The roots grow mostly on the outside where they can form capiliry channels with the container and each other... This helps them retreive and store water, but also makes them prone to rotting in the long term.



    The obvious side to start at is the side with the backbulbs, as they should have no active roots by the time they have no more leaves... I leave the bulb on until it has dried out completely and comes out with just a slight tug... at that point the rhizome between it and the rest of the plant is long dead. Do it too early and you will see the living rhizome you just tore through.


    Take care not to desturb fresh growing tips. Yes, that is indead a peach pip medium. Have not seen a single pip degrade regardless of how old the pots look. They just seem to be problematic if not repotted at least every few years. My mom would take a big pot and just let them grow into it until... keeping enough around not to be bothered with the waiting for flowers.

    Pick the dead roots from the backbulbs and then proceed to any other dead or decaying roots... if its not firm and solid after a good watering like this, it is a gonner...


    Give it a good washdown to clean the crud you could not get to in the first step. Try to remove all the blackened roots right to the stem. I left a few where I saw some new roots started growing in... but I stilled trimed them... This plant did not so much have a problem of retaining too much water, it rather exluded too much so the rotting process for the most part seemed pretty natural and harmless, more a dry rot than a mouldy soggy mess. I think that they will not be a problem and will be a source of nutrition and moisture.... Will inspect tthem in about a month to see if I was right.



    Trim and tear of old leaves and sheaths... take care though not to break off any new baby groths under them... I found one on this plant.. I had tyhe good fortune on tearing one off on the second plant I repotted wich locked this check in for me.

    At this stage you may want to use something like physan or a willow twig tea soak and then it is ready for repotting





    After the trim it obviously had to go to a smaller pot, basicaly the roots just fitted inside and had a little room for growth, would have like a taller pot but, have to make do with what I have.

    Place old pseudobulbs against the rim of the pot as ther is no roots and should be no more growth in that direction. New growth has ample space towards the centre of the pot. For small shop bought cymbs you need to go realy tight with the potting... this one seems robust enough to come to its own equalibrium in the longer term.


    And you are done...



    Keep it in a shady place for a while until the new roots start forming.

    Finaly place it with the old bulbs facing the most sun and shading new blulbs and roots.

  2. #2
    Bikerdoc5968 is offline Senior Member
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    Thank you so much for this repotting lesson. It is really excellent with pictures that demonstrate exactly what to do....excellent!

  3. #3
    Nordic's Avatar
    Nordic is offline Member
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    I left out, after repotting keep an eye out for excesive yellowing of the leaves, this indicates the plant is not getting enough moisture.... and will soon be followed by death if not reversed... I suspect new potting mix is more prone to drying out and may need a bit more often and more thourough waterings. Healthy leaves are apple green.

    I am experimenting with a mix of some diffirent bags of potting mixes I found in the garage... all seem to be horrible when used alone... but I think I found a nice mix than keeps things damp, not moist for longer... gotta remember to ask her what some of the stuff is called.

  4. #4
    wetfeet101b's Avatar
    wetfeet101b is offline It's not dead! It's just permanently dormant.
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    Good job with the repotting instructions.

    Yup, looks like you caught the plant just in time. One more growing season and it would have girdled itself to death.

  5. #5
    Brutal_Dreamer's Avatar
    Brutal_Dreamer is offline Dreaming with my eyes open...
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    Nice instructions, Nico! I just sent you a PM regarding this post.

    Cheers,
    BD

  6. #6
    cdayinflorida's Avatar
    cdayinflorida is offline Senior Member
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    Excellent!

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