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orchids yellow leaves and brown bottom stem

#1 User is offline   tanny 

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Posted 15 February 2015 - 07:12 PM

Hi
I know this topic is probably covered before and I notice that my orchids.. can't name the name but it's not the purple white ones. its those that comes in cluster bunches when flower.
They are under filtered afternoon sun that shines at angle to the orchids. I notice that the bottom of stem is soft and brown but the top stem us green still. I think it is spreading upwards. another pot has limp yellow leaves. I have since move the yellow leaves pot into more shade.

I spray hormones and fungicide every week.

Pls advice
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#2 User is offline   furret 

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Posted 15 February 2015 - 07:53 PM

View Posttanny, on 15 February 2015 - 07:12 PM, said:

Hi
I know this topic is probably covered before and I notice that my orchids.. can't name the name but it's not the purple white ones. its those that comes in cluster bunches when flower.
They are under filtered afternoon sun that shines at angle to the orchids. I notice that the bottom of stem is soft and brown but the top stem us green still. I think it is spreading upwards. another pot has limp yellow leaves. I have since move the yellow leaves pot into more shade.

I spray hormones and fungicide every week.

Pls advice

If Im not wrong it is some kind of virus caused rot
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#3 User is offline   digitalgate 

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Posted 15 February 2015 - 08:31 PM

agreed.
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#4 User is offline   AhSeng 

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Posted 15 February 2015 - 09:08 PM

A picture of it will be useful. First, we need to identify the plant. Is it a type of Oncidium ? The common types of oncidium blooms with yellow flowers, example Oncidium Goldiana , Oncidium Sweet sugar etc.
Or is it a type of cattleya ? epidendrum ? or vanda ?
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#5 User is offline   tanny 

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Posted 16 February 2015 - 02:07 PM

I am still trying to work out how to post pictures here? I have photo bucket but dunno how to upload here. anyone to share?
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#6 User is offline   sixthbrand 

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Posted 16 February 2015 - 02:31 PM

View Posttanny, on 16 February 2015 - 02:07 PM, said:

I am still trying to work out how to post pictures here? I have photo bucket but dunno how to upload here. anyone to share?


There should be a copy link function, just copy and paste it here.
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#7 User is offline   AhSeng 

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Posted 16 February 2015 - 10:02 PM

View Posttanny, on 16 February 2015 - 02:07 PM, said:

I am still trying to work out how to post pictures here? I have photo bucket but dunno how to upload here. anyone to share?


http://i57.tinypic.com/zty7c.jpg

Firstly,upload your picture to photobucket.Copy the link of the picture from photobucket. There are four links, Choose the "Direct" that one. Click "reply" to your thread, and this screen comes out. Click on Icon pointed by me. Then highlight the "http://" and delete it. Because you will have extra http if you don't delete it. Then paste your photobucket link into there and Click "Insert image". see if it works.

This post has been edited by AhSeng: 16 February 2015 - 10:06 PM

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#8 User is offline   boonboon 

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Posted 16 February 2015 - 11:56 PM

You can sign up for photobucket at www.photobucket.com and download your pics there. Then you cut and past their image url which is enclosed in [IMG][/IMG] into here and the pic will be shown when you click 'PREVIEW' or "SUBMIT'.
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#9 User is offline   tanny 

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Posted 17 February 2015 - 03:15 PM

http://rs1060.pbsrc....niy.jpg~320x480

can u see my orchids?
http://i1060.photobucket.com/albums/t446/Tanny_Tait/Mobile%20Uploads/2015-02-15%2010.00.01_zpsnbenbniy.jpg
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#10 User is offline   tanny 

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Posted 17 February 2015 - 03:20 PM

http://rs1060.pbsrc....f6l.jpg~320x480
soft brown stem on orchid pls advice How to treat
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#11 User is offline   digitalgate 

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Posted 17 February 2015 - 05:06 PM

fanny, I have edit for u. Use the code from the page and paste into your posting . Anyway ,u can only use your hand to yank it off the mother and plant to a fresh charcoal media . Also please put the pot any from soil.the mother plant is beyond hope.
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#12 User is offline   AhSeng 

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Posted 17 February 2015 - 06:06 PM

Yours is a dendrobium orchid. I've repotted a dendrobium recently.
When you remove the three pseudobulbs at the top, there is a wound. Sometimes, need a fungicide or some chalk powder, or talcum powder apply on the wound. but you can don't apply anything for this case. Wait a day before watering. Put same level as charcoal pieces and tie down with raffia string. or support with a piece of bamboo stake or two. I usually wash and soak the charcoal in water for a day, and dry it before use.

http://i57.tinypic.com/n3x4jm.jpg

The base of the pot of your plant has some young pseudobulbs. Those can still grow up as it is ,after you cut off the diseased stem. Eventually, you may need to repot the healthy pseudobulbs. It is better not to grow the pseudobulbs deep under the charcoal, as I find that it may rot.
The pseudobulbs at the base maybe need a little more light.

This post has been edited by AhSeng: 17 February 2015 - 06:56 PM

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#13 User is offline   tanny 

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Posted 17 February 2015 - 10:10 PM

Thanks so much. so much. sounds like I cut the bottom stem and save top 3 bulbs and bottom and repot them not too deep.

I wouldn't have known!
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#14 User is offline   AhSeng 

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Posted 18 February 2015 - 12:36 AM

seaweed extracts can make the roots grow and stick to the charcoal rapidly.
When you are thinking of fertilizing the plant with a liquid orchid fertilizer, water the plant thoroughly with plain water first, wait a while like 15 minutes, then spray the fertilizer dissolved in water on the plant and roots. This is to prevent the roots from damage from fertilizer salt.
Seaweed extract no need. I mean for other type of npk liquid fertilizers.

This post has been edited by AhSeng: 18 February 2015 - 01:08 AM

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#15 User is offline   tanny 

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Posted 19 February 2015 - 04:34 PM

http://rs1060.pbsrc....320x480?t=14242 48346
I have shift my orchids to fully shade. usually it's under filtered sun on bench. is it too much sun? I have been growing for years no problem only lately?
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#16 User is offline   AhSeng 

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Posted 20 February 2015 - 11:41 PM

View Posttanny, on 19 February 2015 - 04:34 PM, said:

http://rs1060.pbsrc....320x480?t=14242 48346
I have shift my orchids to fully shade. usually it's under filtered sun on bench. is it too much sun? I have been growing for years no problem only lately?


I think you can repot them, as you mentioned that you have grown them for years. However, if repoted, the leaves will still turn yellow and drop off. Hope after repotting, new shoots will form rapidly and grow roots. Your plants currently don't have any new pseudobulbs, as seen in the picture. Observe if any growing root tips. The root tip is green in colour or red/brown tip for some types of orchids. If you water the plants sufficiently and there is no growing root tips, probably means the roots isn't healthy. so maybe repot or maybe need to flush the pot thoroughly and regularly using a water hose.

Anyone got a suggestion for this yellowing leaves ?

This post has been edited by AhSeng: 20 February 2015 - 11:43 PM

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#17 User is offline   Camou 

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Posted 12 March 2015 - 03:42 PM

I was browsing through and i found this thread,i hope thread starter
wont mind if i throw in a few questions.Do these
orchid type need full and partial sun? I have one of those but
my place is north south facing so there is no direct sunlight.
Will it able to survive and flower?
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#18 User is offline   digitalgate 

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Posted 12 March 2015 - 04:29 PM

your place has max 3 hours of sunlight depending on time of year . The sun rise from south east to northeast from next month .
dendrobium prefer partial shade for 4.5 hours a day . U might want to grow phalaenopsis which does well in shade condition .
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#19 User is offline   Camou 

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Posted 12 March 2015 - 06:09 PM

Thanks for the reply.
However my place get no direct sunlight,it is almost perfect north and south facing.
So the dendrobium will not grow? phalaenopsis look good if it fit my corridor condition
then i will definitely get it.
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#20 User is offline   keff 

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Posted 12 March 2015 - 07:36 PM

View PostCamou, on 12 March 2015 - 06:09 PM, said:

Thanks for the reply.
However my place get no direct sunlight,it is almost perfect north and south facing.
So the dendrobium will not grow? phalaenopsis look good if it fit my corridor condition
then i will definitely get it.


Since you already have the dendrobium, why not just try it out? Sometimes it is very difficult to judge the amount of light available at your place without visiting it in person. You might just be surprised what you can grow.
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