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 5 of 5

Thread: Dens turning yellow

Click here to increase the font size Click here to reduce the font size
  1. #1
    Join Date
    May 2005
    Savannah GA

    Default Dens turning yellow

    We had a week of cooling nights a couple weeks ago and after the temps dropped into the high 40s-low50s once or twice I decided it might be time to bring the orchids in for the winter.

    All were healthy prior to moving them, but a couple days after bringing them in I noticed the leaves on the Dens had turned yellow en masse.

    Did I rush the move? If so, a move back outside should help/hurt/make no difference at this point?

    Or did the 45-55F temps do the damage and I just saw the effects after bringing them in?

  2. #2
    Join Date
    Jul 2004


    Depends what type of Dens.
    Some Dens(Den nobile & hybrids for an example)do drop thier leaves
    just before they need their rest period prior to flowering.
    Do you know what Dens they are ?

  3. #3
    Join Date
    May 2005
    Savannah GA


    I bought all three at a clearance sale, all were in poor health and all recovered and were beautiful plants until the recent move. Unfortunately only one--the one least affected, BTW--had a name tag and it reads Thongchai Lai. That one was/is in bloom, currently in the final stages, and only the very lowest of its leaves turned yellow. the other two--without ID labels--have 90-95% of their leaves yellowed, almost overnight following the move. Due to the positioning on the clearance table I had assumed all of the plants were the same, but that IS an assumption.

  4. #4
    Real Name
    My Grow Area
    Favorite Orchid(s)
    Join Date
    Jan 2005
    Sydney, Australia
    Member's Country Flag


    I find that a lot of these phalaenanthe type Dendrobium hybrids are very temperature change intolerant!

    I would say that the low 40's temp did the damage and the plants have decided "too cold" and go into dormancy.

    No big deal, they will pop up a new cane when the weather warms up again. Make sure you keep em dryer when it is cold/cooler.


  5. #5
    Join Date
    May 2005
    Savannah GA


    Thanks for the replies. The temps warmed back up so I moved them back out; now the yellow leaves have fallen off and they do look better without them. The canes still look healthy so the temp-change intolerance must have been at work but apparently without seriously damaging them.

    We had a low of 47 last night (days are 65-70) but it will be warmer for the next few days so I'm thinking I'll just leave them out for a bit longer unless someone tells me in no uncertain terms I'm playing Russian Roulette with their health.

Similar Threads

  1. 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
  2. Orchid Leaves turning leathery
    By SunnyNuzz in forum Orchid Ailments / The Compost Pile
    Replies: 9
    Last Post: May 27th, 2009, 05:54 PM
  3. seedling den's leaf turning yellow
    By elissamiranda in forum General Orchid Culture
    Replies: 4
    Last Post: March 20th, 2009, 12:32 PM
  4. NewSheaths turning dark color on Cattelya
    By grayeyes in forum New Growers: Ask the Senior Members
    Replies: 3
    Last Post: December 31st, 2007, 01:55 AM
  5. Phalaenopsis leaves turning yellow - fast
    By wetfeet101b in forum Orchid Ailments / The Compost Pile
    Replies: 10
    Last Post: November 21st, 2007, 08:38 AM

Tags for this Thread

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.