The Six Horticultural Groups of Dendrobium
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The Six Horticultural Groups of Dendrobium
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  #1  
Old 02-06-2008, 02:30 PM
Ross Ross is offline
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Default The Six Horticultural Groups of Dendrobium

As classified by Rebecca Tyson Northern, there are 6 groupings that describe the differences in growing needs of Dendrobiums. I am paraphrasing to avoid copyright infringement.

Type I (deciduous, so-called nobile type) intermediate to warm in summer, cool to cold in winter, full winter rest. Examples: D. nobile, D. chrysanthum, D. wardianum.

Type II (deciduous) intermediate to warm all year, full winter rest. Examples: D. speciosum, D. aggregatum, D. findlayanum, D. heterocarpum, D. superbum (anosmum), D. parishii, D. pierardii.

Type III (persistent) intermediate to warm summer, cool in winter, no winter rest - simply reduce water. Examples: D. densiflorum, D. fimbriatum, D. thyrsiflorum, D. farmeri.

Type IV (persistent) cool all year. Short suspension of water early autumn. Examples: D. bellatulum, D. secundum.

Type V (persistent) Intermediate all year. No rest. Examples: D. antilope and hybrids of type V and type VI.

Type VI (persistent) warm growing all year. Restrict water twice during year. Examples: D. phalaenopsis, D. bigibbum, D. superbiens.

Now, I have little personal success with any, except type II, so I can't help with culture on the others (I kill them more often not not - or they just up and die ) but deciduous type II are said to be the easiest for in-house culture, if one follows their needs strictly. I've found this to be true for D. anosmum. Hope this helps others.
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Old 02-06-2008, 02:47 PM
shams shams is offline
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Thanks Ross,

All this dendrobium alk lately has mostly just confused me, as I didn't know what type meant what. I'm still in the dark as to what I have, but still researching.

Thanks again

niki
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Old 02-06-2008, 02:56 PM
quiltergal quiltergal is offline
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I know this info has been posted before. Can one of the mods please make this a sticky? Pretty please??
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Old 02-06-2008, 03:05 PM
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Quote:
Originally Posted by shams View Post
Thanks Ross,

All this dendrobium alk lately has mostly just confused me, as I didn't know what type meant what. I'm still in the dark as to what I have, but still researching.

Thanks again

niki
Just research the cross (because likely you have hybrids) and compare parents/grand parents to this chart.
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Old 02-06-2008, 03:11 PM
kavanaru kavanaru is offline
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Excellent, Ross! thanks for this info!
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Old 02-06-2008, 03:30 PM
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Great post! I do have a question though - What group do the dendrobiums from the formosae group (the black hair dends/nigrohirsute) belong to? I feel like it is Group IV, but then it's a little confusing because I was just researching dend tobaense (which has an awesome flower btw) and it is stated as a warm grower! So perhaps this group has a bit more range? I'm not sure - I've never grown them before...I've only dreamed of growing them
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Old 02-06-2008, 04:09 PM
Ross Ross is offline
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Group IV is correct. That is represented by D. bellatulum.
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Old 02-06-2008, 06:15 PM
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Great post Ross, very helpful!
I think hobbyists are able to gain a better undstanding about the culturing needs after reading about the 6 different types of dens.
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Old 02-06-2008, 06:25 PM
quiltergal quiltergal is offline
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I have a nigrohirsute that is a cross between group IV & V. It has cruentum and formosae in it's parentage. I grow it as a group V and it's going nuts, blooms all over the place.
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Old 02-06-2008, 06:28 PM
Ross Ross is offline
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Originally Posted by quiltergal View Post
I have a nigrohirsute that is a cross between group IV & V. It has cruentum and formosae in it's parentage. I grow it as a group V and it's going nuts, blooms all over the place.
This is a very helpful post for those with similar Dendros. Thanks for posting this.
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