Dendrobium parvulum (syn delicatulum)

Also curious about light levels, and also your growing temps. I've got a mounted one that is growing very well, and I'm wondering if I need to do anything different to coax blooms. -Stephen

 

I also want to know! I've got mine mounted growing next to my subuliferum. Didn't seem to like cool temps and defoliated.

 

Ha, I had the same/opposite problem: subuliferum didn't like the warm temps for the parvulum. Also defoliated.

 

Haha, last year I decidedly made the conclusion my ugly foliage and sparse flowering of subuliferum was due to it being cold. Moved it 3 meters towards the warmer end and they responded lovely!

 

It looks fantastic! Congrats!
Anyone knows the diff between delicatulum and parvulum? Recently I received a parvulum(originally from Andy P's listing) and the growths and leaves are almost 2-3X bigger than my delicatulum(from Tom P). Years ago, I had another delicatulum and its growth was the same size like the one I have now.

I grow my delicatulum I/C, bright light /light shade. It grows very well but no flowers.

 

It looks like we are all on the same page except for Marni b/c she can bloom the damn thing. Is there anything that can be said for more success growing it horizontally versus vertically? What are you fertilizing it with and at what ratio?

 

Marni, those are night minima right? Mine is vertically mounted nights around 55° days 80°F bright light. Liberally fertilized, always with a RO flush proceeding that. Mine too was from Tom's. If I recall it was an imported one from Japan, I can't be too sure because when I got it I had suffered a traumatic brain injury a couple weeks earlier.

 

Awesome plant. Does anyone know of a source for this species in the US?

 

I got mine from Andy's maybe 1.5 years ago. It's not on his website, but with Andy it's always best to call and ask anyway. It wasn't cheap, and he didn't have many of them. Good luck.

 

Wonderfully grown Marni!!

I have a pink and blue clone which are both producing alot of foliage, yet, very little roots so far.
Did you notice any increase or decrease of root production when you changed the temperature?

I heard they have been found on (mossy) rocks too and i doubt orientation matters much. I grow mine horizontal too.

 

Hi Marni, That is correct according to Kew. but do you see any differences among all your clones in terms of growth? Those few Den.delicatulum I have seen/grown are significantly smaller than the one(labeled as Den. parvulum) I received a week ago, and I was told this Den. parvulum came from Andy's Orchids. Just curious...

 

Jeff, I used to grow mine on horizontal mount(cork) then I just hanged it up and grow it vertical and a bit more light. I don't think my plant cares much about the position of the mount...it does have lots of roots.
Sorry for the hijack again.

 

Thanks for clarifying Marni.

According to the "oxyglossum book" the species name is D. delicatulum. As for the subspecies: subsp. parvulum is distinguished from subsp. delicatulum by it's significantly larger flowers (more than 1.2cm long). Though, they mention that the differences may not be great enough to keep the two subspecies apart. Red is mentioned as possible flower color too.

We could use some updated literature. I have seen photos of oxyglossums surface online which have color or foliage variations that aren't described yet, new undescribed oxyglossum species are showing up that are not in the book or anywhere else.

Tom: I agree, and in the wild they probably ramble over many types of terrain, both vertical and horizontal.

We got four tiny pieces of supposedly pink delicatulum the last year here, two survived, i don't know if they are seperate clones. I think they will start to pick up the pace once they reach a certain size.