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  #1  
Old 09-08-2014, 11:47 AM
Atzau Atzau is offline
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Dendrobium winter rest? Female
Default Dendrobium winter rest?

Hi all, sad to say but the colder temperatures are starting to dawn upon us after a not so hot summer.. .where did that summer go??? anyhoo, my 2 dendrobiums are starting to get slightly yellow leaves here and there. I'm assuming this is their signal that they want their winter rest? They are noids that my mom got me (at a flower show none the less! You'd think they'd have tags! ) so I'm not sure what they are but i did post them up in the id section when i first got them and i believe the consensus is that they are nobile type dendrobiums and would require a winter rest. So no fertilizer and no water? Or just less water? I'm in Toronto. Would it be too early to start with the winter rest?

Here are the lovelies in bloom when i first got them...


And...
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  #2  
Old 09-08-2014, 01:12 PM
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Ray Ray is offline
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As long as the plants are blooming, they're still active.

Once the flowers drop and the leaves begin to do the same, then it will be in its dormancy period. Water or mist lightly to keep the canes hydrated, but under no circumstances apply any fertilizer until new growth resumes.
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  #3  
Old 09-08-2014, 02:17 PM
Cntry Cntry is offline
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Your dendrobiums are very pretty. I wouldn't mind having one as pretty as yours is myself.
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Old 09-08-2014, 03:01 PM
Atzau Atzau is offline
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Yes, the flowers have dropped for awhile now... Sine then they've sprouted a cooler if new canes each but lately I've noticed one or two yellowing leaves. I guess that means to start cutting down on the water... Thanks for the confirmation!
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Old 09-08-2014, 03:03 PM
Atzau Atzau is offline
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Thank you cntry, these are my first dendrobiums. Hope I'll be able to get them to bloom for me!
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Old 09-08-2014, 06:46 PM
NYCorchidman NYCorchidman is offline
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Yes, these are nobile type hybrids.
I love these plants very much and I have a bunch myself.

Well, you don't have to water much anyways because even when your plants were in bloom, I see they all had completely mature cane, which you can expect flowers out of in the coming spring.

During the winter rest, you still want to water but much less because plants are not in active growth mode and therefore do not need as much water.

Some say no water the entire winter, but I highly recommend against this. People do not correctly understand what "dry" rest means. Dry is more like "drier than", rather than "bone dry".

The back bone species of these hybrids come from area where they grow rapidly during the hot rainy summer and during this time (summer monsoon) they will get poured down on every day.
Once that season passes, the rain is much less frequent and this weather continues throughout the winter into the spring.
However, during this time, plants received a lot of water in the form of very humid air and early morning dews. They are basically watered every singly day in the wild just like many other orchids.

In the cultivation, you want to learn from this and try to simulate as much as you can.

For an easy comparison, my nobile hybrid growing in a 4 inch pot with bark chips are watered almost daily during the summer while it is growing actively. or if I slack off, say I forgot to water for three days (during hot summer days this is long enough time for the newly and acitvely growing leaves to wrinkle and stick together) I would soak the entire pot for a while.

Once I see the very last leaf on top of the cane, which is usually around late summer into fall, I start to reduce watering to, I don't know, about twice a week.
During the winter, watering frequency is up to how cold you keep your plants.
These are very hardy plants and will survive near freezing just fine. When you are keeping them this cold, you only need to water occasionally, and do it in the morning on sunny day.

Yamamoto dendrobium website says 14.4 C (58F) is the minimum night temperature for their hybrids. A bit colder, and you will be guaranteed to have a great blooming.

Anyways, I now grow my nobiles in my apartment that does not get cold enough for them. So I water at least once a week.

Let the canes be your guide.
I water enough so that the canes are all plump.
Slight wrinkles won't harm them, but not recommended.

Good luck!

Regarding the name, the first one looks to me like Country Girl I have.

The second one might be Violet Fizz 'Luna'.
Just my thoughts.
It's odd that plants sold at a show come with no tag.
Whatever they are, they basically take the same nobile hybrid culture I shared on this post.

Last edited by NYCorchidman; 09-08-2014 at 06:56 PM..
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  #7  
Old 09-08-2014, 07:08 PM
Atzau Atzau is offline
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Thanks for all the info NYC. Much appreciated! Will follow the guidelines and water lightly.
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Old 09-08-2014, 07:22 PM
NYCorchidman NYCorchidman is offline
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My pleasure.
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  #9  
Old 09-08-2014, 07:58 PM
Optimist Optimist is offline
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I will be doing the thanksgiving till valentines day schedual. They are still outdoors for September, early November.
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Old 09-09-2014, 12:25 AM
SoCalOrchidGirl SoCalOrchidGirl is offline
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This is slightly off topic...I have noticed many other people's dendrobium nobles have straight canes. Mine is curved at the top, is there a reason why mine does that and is it something I need to worry?
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