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  • 2 Post By orchidpeople
  • 1 Post By Cjcorner

repotting a cymbidium

This is a discussion on repotting a cymbidium within the General Orchid Culture forums, part of the Orchid Culture category; I'm about to repot this cymbidium, all the new growth is towards the center of ...

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  1. #1
    Teena's Avatar
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    Default repotting a cymbidium

    I'm about to repot this cymbidium, all the new growth is towards the center of the plant. There are a couple of old crowns. My question is this, do I leave those crowns or do I cut them out to give the plant room to grow?


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  2. #2
    orchidpeople is offline Member
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    Default

    General rule for dividing and repotting is to leave at least 3 bulbs together. Can be one 'Back Bulb (those that look dormant)' and two green ones. As far as removing the Back Bulbs, I remove a few but be sure to leave one or two as these supply food for flowering. Say there are 4-5 Back Bulbsd and 6 green bulbs. I'd divide the plant in two with 3-4 bulbs on each and then remove 2-3 of the back bulbs. You can germinate the back bulbs with a fair amount of success. I take presoaked bark (only bark) and fill a quart ziploc about 1/3 with the moistened bark. Then take the cleaned back bulb that has dried for a few days (be sure to be careful of any eyes on the base of the bulbs) and bury them 1/3 of the way in the bark. Seal the ziploc. Let sit for a few months in a place with indirect light. When they germinate pot them up. As always when repotting remove any rotten roots. I usually cut the roots half off to make dividing easier. They will regrow. Also remove dead matter from the sides of the back bulbs if you can. Scale can live there so it's good to inspect.

  3. #3
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    Thanks Bob, I've been working on the roots for the past 3 hours, this plant was severely root bound, it's been a very tedious process getting to the dead stuff in the center.

    martha

  4. #4
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    I found a great video on you tube awhile back on repotting cymbidiums. I was so shocked, the guy took out a saw and cut off about 2/3rds of the roots. Just hacked them off. I think a big thing with cymbidiums is getting a pot that is tall and slender like they come in. Someone once suggested using kitchen trash cans and plastic ice tea pitchers for repotting them in. You can use a soldering iron to melt holes in the plastic containers large enough for drainage and air exchange.

  5. #5
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    The first big adventure for Maura and me was repotting her cymbidium that had old bulbs on the outside and the new growth on the inside. We did research talked to experienced cym. growers as well as watching those you tube video's. Some of the best advice we got was actually from a You Tube video in which they said not to molly coodle the plant and that using a saw was perfectly fine, in fact it is the only way to get through those compacted roots. We cut off 3/4 of the roots toward the top, rearranged the back bulbs and put the new bulbs on the outside of q slightly larger container than it was in before and it never missed a beat. I was nearly certain that the foliage would 'fall out' by seeming to die back, but it never did and is pretty as it has ever been (except when in bloom). Now if we can get the temp. differential correctly it should set some spikes late autumn and early winter. So go ahead and chop that thing up and cut off much of the old roots, just remember to place the old bulbs in the center and the new bulbs toward the outside of the container. Good luck with this project and special good luck finding a proper container.

    Phillip

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    Wow, a saw, ouch, how horrific for the plant. No, I just sat there for 3 hours nudging at the roots one by one, I'd soaked the plant for 6 hours prior. Every now and then I'd drop it back in the bucket of water to soak for a 10 minutes or so. Eventually I started to get to the dead stuff and cut it away. I finally got to a point that I could start to separate it at the top, I had to get out the single use hobby knifes to cut into it and then let it rip. I'm proud to say that I only lost 1 long root. BUT I ended up with THREE divisions instead of two since the root ball of 1 side was just too large to fit into the new pot so now I'm on the hunt for a third pot. Which means another trip to the garden center but luckily in another greenhouse from where that orchid table is. Good thing since I now have about 3 more orchids than when I started repotting since I also split a dendrobium! Need more room.

  7. #7
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  8. #8
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    Thanks Bruce, Actually I started there first but my plant was completely roots when I got it out of the pot, no medium whatsoever. In the end there was some completely decomposed medium in the very center.

    martha

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