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  • 2 Post By catttan
  • 1 Post By kiwiorchids
  • 1 Post By mauraec
  • 1 Post By mauraec

Dendrobium inflorescences

This is a discussion on Dendrobium inflorescences within the Genus Specific forums, part of the Orchid Culture category; I have a new NOID orchid (of course) Dendrobium with several spent canes, but what ...

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  1. #1
    mauraec's Avatar
    mauraec is offline Senior Member
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    Default Dendrobium inflorescences

    I have a new NOID orchid (of course) Dendrobium with several spent canes, but what really has me puzzle is that the principal spike blooming right now grew from the side of an old, spent spike. I thought only phals did that - are there other plants that will throw out a spike after the principal one is cut back? This particular den has four canes that already bloomed and have been cut back, the fourth one was similarly cut back and then threw up a 24" impressive spike as a pretty amazing afterthought. If this is a common happening, is there any particular care that will improve the chances of more blooms?

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    This isn't a great photo, but I think it shows what I'm trying to describe. All the old spikes were cut back and dusted with cinnamon.

  2. #2
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    catttan is offline Senior Member
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    Nice dendrobe, Maura. Can't help with the ID as there are lots of similar looking phal-type denrobes around. I'm afraid you've cut back the cane instead of just the spike. I'm posting pictures of how to cut back the spike, leaving about 1/2 inch to 1 inch of the spike. As you can see from my pix the old cane is capable of producing new spikes in sequence or multiple spikes all at once or in sequence. The same canes can also produce keikis at the top as well as at the base. I've had keikis growing out from the green stump of the cut spike. You have done the right thing by applying cinnamon to the cuts.
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  3. #3
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    kiwiorchids is offline Plant Nut
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    It sounds as if your confused. Most dendrobiums will flower for a few years off the same canes, some will not flower until the year after the cane grows! Too bad you cut the canes though. Dont cut them unless they look really, really shriveled!

  4. #4
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    Thanks, guys - I'm learning from you so I can hopefully help my one lonely Dendrobium. Once I know better what I'm doing, I think I'll have to try more of these beauties.

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    I can't tell you exactly what the decision=making process was on this dendrobium orchid - I acquired it in the exact condition the photo shows- I wouldn't at this point ever have dared to choose where to cut a spike or cane or any of the part of a new plant. I dusted the cane tops with cinnamon just as a precaution - I didn't cut them back. So.... if I seem confused, it's because this den doesn't seem to be following the rules of all my others and what I've read, but it's really strong and healthy anyway. I have no idea why someone would cut the canes back, or why a spike would sprout out of the side of a cane stub, but this plant is from an orchid nursery, so I (perhaps wrongly) assumed they knew what they were doing. I have 3 other dendrobium/phals and haven't touched the canes on any of them, although I did trim down the spent spikes. They seem to be m happiest orchids, aside from my paphs.

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    I assume that Maura is trying to tell us that her dendrobium regrew a spike from a dormant bud on an old cut inflorescence like a Phalaenopsis, not from the cane which is usual.
    As to my observation I have never seen this happen unless the original stalk tip was damaged before it produced any buds, if that happens another bud will take over, but I have never observed it from spent inflorescence stalks.

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    Quote Originally Posted by Halloamey View Post
    I assume that Maura is trying to tell us that her dendrobium regrew a spike from a dormant bud on an old cut inflorescence like a Phalaenopsis, not from the cane which is usual.
    As to my observation I have never seen this happen unless the original stalk tip was damaged before it produced any buds, if that happens another bud will take over, but I have never observed it from spent inflorescence stalks.
    THANK YOU, AMEY! That's exactly what I was trying to explain. I didn't THINK you could respike a den from a spent spike, but this one somehow has and I now I don't have to spend any more time (or anyone else's) trying to figure out how that happened.

    Maura

    PS - I had started to wonder if the den/phal hybrids had become so heavily influenced by phals that that growth pattern was starting to carry over.

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