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| Orchid Ailments / The Compost Pile Discuss, My Sickly Dendrobium at Orchid Culture forum; So I've had this dendrobium for about 9 months now ... |

08-04-2008, 12:22 PM
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Join Date: Mar 2008
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Location: Eastern Oregon
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My Sickly Dendrobium
So I've had this dendrobium for about 9 months now and it has been doing just amazing. But over the last three or four days, the base of the new cane turned black and the whole cane has gone over sideways. There's obviously a problem but I don't know what it is! And It's also apparent that I've lost the cane so I don't know what I should do for the thing...
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08-04-2008, 03:02 PM
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Orchid Wrangler
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Join Date: Sep 2007
Favorite Orchid(s): Paphiopedilum
I grow my orchids: On a Windowsill.
Location: Dayton, Ohio
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Sounds like a bacterial or fungal infection. Can you post a pic of the plant? You should probably cut that cane off with a sterile knife, and then treat the rest of the plant with Physan 20. How often are you watering your dendrobium? You might also want to check the condition of the potting media. If it is broken down, it won't dry out very well, which can cause fungal problems.
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08-04-2008, 05:11 PM
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I'll get a picture here soon. I don't think the potting medium is the problem, It's only like a 2 or 3 months old so practically brand new. It drains really well.
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You know how the saying "eyes bigger than your stomach" well I've got the same problem with my ambitions, lol
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08-04-2008, 09:15 PM
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Senior Member
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Join Date: Dec 2007
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Quote:
Originally Posted by Newbiegreenthumb
I'll get a picture here soon. I don't think the potting medium is the problem, It's only like a 2 or 3 months old so practically brand new. It drains really well.
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Well, if you got it at an orchid nursery, then the medium is probably still good. However, if you purchased it at a grocery or big box store, even though it seems to drain well, there's probably a big ball of sphagnum in the center wrapped around the roots, which will take forever to dry out. If that's the case, I would suggest unpotting the plant, cutting off any infected parts of a plant, using a new, sterile razor blade for each cut. Then, repot it into a better medium.
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Geoffrey
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08-04-2008, 11:42 PM
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Dreaming with my eyes open...
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I have found it is always better to repot your new orchids even if they come from a trusted source. Putting your plants into your own mix is winning half of the battle. This way your orchids are all going to withstand your watering habits.
Cheers,
BD
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We could learn a lot from crayons: some are sharp, some are pretty, some are dull, some have weird names, and all are different colors....but they all exist very nicely in the same box. ...Hmmm? .
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08-05-2008, 06:42 AM
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Senior Member
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Join Date: Jun 2008
Favorite Orchid(s): Den. phalaenopsis
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Location: McHenry Co. Illinois
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Quote:
Originally Posted by Newbiegreenthumb
I'll get a picture here soon. I don't think the potting medium is the problem, It's only like a 2 or 3 months old so practically brand new. It drains really well.
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Did you recently repot the den? Dendrobiums grow best in pots small for the size of the plant. They like to be potted firmly in the medium, with the roots getting ample drainage and aeration. Unlike phalenopsis, dendrobiums store water in their pseudobulbs (canes with and without leaves) and do not need frequent care. My Den. phals want to be very root bound and very close to completely dried out before they get watered.
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08-05-2008, 12:46 PM
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Senior Member
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Join Date: Dec 2007
Favorite Orchid(s): Like I could really choose...
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Quote:
Originally Posted by Brutal_Dreamer
I have found it is always better to repot your new orchids even if they come from a trusted source. Putting your plants into your own mix is winning half of the battle. This way your orchids are all going to withstand your watering habits.
Cheers,
BD 
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I agree fully. Not only do you get to repot into a mix that you understand and are familiar with, but also you never know what is inside of someone else's mix. I once unpotted a Phrag seedling only to find a centipede hanging out in there. That's fine if I were growing all mine outside, but I grow indoors, mostly. I don't want to bring centipedes inside if I can help it...
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Geoffrey
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08-05-2008, 01:49 PM
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I did repot it in my own mix. That's why I know what the age of it is. I water about every six days or so, that's about how long it takes for the medium to dry out. I'm gonna order some Physan so that I can treat it, it's just so GRRR!!!! Ya know?
Oh and has anyone encountered new growth coming out of last years cane?
__________________
You know how the saying "eyes bigger than your stomach" well I've got the same problem with my ambitions, lol
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