Shop Orchid Care OrchidTalk Orchid Forum Links Nursery

Welcome to OrchidTalk Orchid Forums


The Friendliest Orchid Community on the Internet!


  •  » Learn to Repot your Orchids
  •  » Learn Orchid Care Tips and Secrets
  •  » Find the perfect Orchid for your Growing Environment
  •  » Chat with Orchid Growing Professionals

OrchidTalk - "Bringing People Together to Grow Orchids Better!"


Let us help you grow your Orchids better; Join our community today.


YES! I want to register an account for free right now!


Register or Login now to remove this advertisement.

Results 1 to 9 of 9

Dendrobium Lori's Star - leaves yellow and dropping

This is a discussion on Dendrobium Lori's Star - leaves yellow and dropping within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I purchased this plant -- in bud, with glossy green leaves. It now has leaves ...

Click here to increase the font size Click here to reduce the font size
  1. #1
    EllenGST is offline Member
    Join Date
    Feb 2017
    Gender
    Female
    Location
    Massachusetts, US
    Posts
    42

    Default Dendrobium Lori's Star - leaves yellow and dropping

    I purchased this plant -- in bud, with glossy green leaves. It now has leaves turning yellow and falling off.

    I had it in a bright room - south facing, but a few feet away from glass sliders. Yesterday I moved it to a sunnier spot - south facing solarium. Today we're having a blizzard, and I worry that this could be too much light and too warm on a sunny day.

    Name:  Den Lori's Star #2resized.jpg
Views: 653
Size:  295.5 KB

    Advice on how to restore this plant's health would be greatly appreciated.
    -Ellen

  2. #2
    sciencegal's Avatar
    sciencegal is offline Senior Member
    Real Name
    Karin
    Join Date
    Apr 2015
    Gender
    Female
    Location
    New Mexico
    Posts
    701

    Default

    I'm wondering how you are keeping it. Does it just sit on its roots on the table? Was it in that pot that it's sitting next to? It could be getting dehydrated.
    Posted via Mobile Device

  3. #3
    Chris in Hamilton's Avatar
    Chris in Hamilton is offline Senior Member
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Dendrobium, Cattleya
    Join Date
    Jul 2014
    Gender
    Male
    Location
    Ontario, Canada
    Posts
    5,019
    Member's Country Flag

    Default

    What I'm seeing could be normal leaf die off on an old cane but you mention that you bought it in bud. Did it flower? Have you had new growth since you got it?

  4. #4
    EllenGST is offline Member
    Join Date
    Feb 2017
    Gender
    Female
    Location
    Massachusetts, US
    Posts
    42

    Default

    Thank you to those who've responded. Sorry for the lack of detail in my post - accidentally lost my original post and omitted detail when starting over. I bought it on Jan 28, it is in a small plastic pot - think it needs a larger pot when finished blooming as it is top heavy and prone to toppling. This is in our 2nd home (which is currently occupied by my parents) I've watered it weekly at the sink - running water through it, then letting it drain. It's potted in bark, which does not appear to be rotted at all. The roots seem healthy - not dehydrated.

    The house temperature here is a bit erratic - if sunny, the house is very warm, if not, it doesn't heat up well, but seldom falls below 64 daytime or below 58 nightime. Can get into 80s in daytime if sunny. I'm only here part-time. Am probably going to move the plant to our other house after my parents move, so that I can keep a closer eye on it, but need to time that to avoid super cold weather. (in Falmouth, on Cape Cod.)

    It was on the mantel - about 5-6 ft away from south facing sliders. I moved it yesterday afternoon to our passive solar/solarium space, but think that could be too much sun.

    Name:  Den Lori's Star resized.jpg
Views: 507
Size:  279.4 KB

  5. #5
    Aeronaut is offline Senior Member
    Join Date
    Jan 2017
    Posts
    304

    Default

    How often do you water? What water do you use? These dendrobiums grow best with a 10 to 20 degree temp drop at night
    Posted via Mobile Device

  6. #6
    Chris in Hamilton's Avatar
    Chris in Hamilton is offline Senior Member
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Dendrobium, Cattleya
    Join Date
    Jul 2014
    Gender
    Male
    Location
    Ontario, Canada
    Posts
    5,019
    Member's Country Flag

    Default

    Everything looks good from what I can see. Try to water it as soon as the medium is dry. That is probably a bit more often then once a week. Wait to repot until you start seeing new roots growing. When you do, don't tear apart the root system trying to get all of the old medium off. It looks like it is in a 4" pot so I would go up to a 6", nothing bigger. Dendrobium like having their roots crowded when they are in a pot. Try to match the old medium as closely as possible when you select the new one.

  7. #7
    EllenGST is offline Member
    Join Date
    Feb 2017
    Gender
    Female
    Location
    Massachusetts, US
    Posts
    42

    Default

    Thank you, Chris. I think your comment may have helped me figure out the problem. I took a closer look at the pot and see that there's a small round pot inside the 4" square pot. This is going to be challenge - the pots are stuck together, and I think I'll have to carefully cut them away from the roots. It looks like the medium is chunks of porous rock - not something I've experienced before. Between the medium and the too small pot, watering is likely the culprit.
    I'll have to figure out a way to water more often - a challenge when I'm back and forth between 2 houses, but not impossible.

  8. #8
    Chris in Hamilton's Avatar
    Chris in Hamilton is offline Senior Member
    My Grow Area
    Windowsill
    Favorite Orchid(s)
    Dendrobium, Cattleya
    Join Date
    Jul 2014
    Gender
    Male
    Location
    Ontario, Canada
    Posts
    5,019
    Member's Country Flag

    Default

    Possibly lava rock. Lava rock is not going to decompose the way most mediums will but it can absorb mineral salts and other nasty stuff. I would cut away the 4" pot but not the smaller one. Just put that into a new 4-5" with a bit of medium under the small one so the rims are even. You should be able to get lava rock at any garden center. Be sure to wait until you start to see new roots growing. Are the growths on the longest pseudo bulb keiki?

  9. #9
    EllenGST is offline Member
    Join Date
    Feb 2017
    Gender
    Female
    Location
    Massachusetts, US
    Posts
    42

    Default

    The longest cane has 3 flower buds - you might be able to see that one is lighter - closer to blooming. There is something that might be a new root starting - will watch it to see what it does.

Similar Threads

  1. Phal suddenly yellow and dropping leaves
    By solus in forum Phalaenopsis ('moth orchid') Information
    Replies: 4
    Last Post: April 14th, 2014, 11:39 PM
  2. help with dendrobium lori's star
    By acanigs in forum Dendrobium Information
    Replies: 5
    Last Post: July 28th, 2012, 07:58 PM
  3. Phalaenopsis dropping leaves - is it the cold?
    By robertinventor in forum New Growers: Ask the Senior Members
    Replies: 5
    Last Post: May 4th, 2012, 05:19 AM
  4. Dendrobium Lori's Star (Dawn Marie x Lori Tokunaga)
    By gardenguysorchids in forum Dendrobium Information
    Replies: 5
    Last Post: January 31st, 2010, 07:39 AM
  5. orchid leaves are turning yellow and dropping off
    By beck in forum New Growers: Ask the Senior Members
    Replies: 5
    Last Post: June 7th, 2009, 10:42 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
OrchidTalk --An Orchid Growers Discussion Forum brought to you by River Valley Orchidworks. A World Community where orchid beginners and experts talk about orchids and share tips on their care, cultivation, and propagation.