Dendrobium laevifolium spots on leaves?

[Tom-DE]

"Tom. I 've got to disagree just a wee bit about the temp range. I think that I/C is entirely suitable for cuthbertsonii, however, laevifolium is a bit warmer. Laevifolium will surely tolerate cool (it may even experience cool in its habitat). However, I think that it really thrives in the range between 50F and 75F ... if you can give sufficiently bright light in the lower temp periods. "

Catwalker, it all depends on your definition of I/C. Yes, it basically is an intermediate grower, but this species is from 400 to 2400 meter alt., so it can handle wider range of temperature and that is why I said I/C but it can handle warmer temperature
My definition of I/C:

Intermediate(I) 55-80F
Cool(C) 50-70F
Warm(W) 60-90F

I am not going to define cold or hot, you should get the whole picture now.





"Tom. your plant is blooming with full foliage (in mid summer) so you must be able to somehow provide the lower temps even when it is very bright and hot outside."

All the flowers on my plant are from leafless pbulbs. It normally starts to bloom in mid/late May and the flowers last for four months under my condition. I don't grow this one outside. The high temperature in my inside growing area is not more than 75F.

" For growers like yourselves in temperate zones, it may be more difficult to achieve any winter growth. In temperate zone low light winters, the plants look like a cluster of smal dried round onions."

Both of my plants don't grow(much) during the cooler months and they drop off some leaves, which it is normal. This species blooms on leafless canes...

"Attached is a photo of a plant I bloomed probably in mid Feb. with 52F to 75 temps and very bright light."

Hmm, that is called intermediate temperature in my book.





"Jason. I agree with Tom about the potting. Your sphagnum might be keeping your roots soggy since they are thin clinging roots rather than fat feeding roots. "

Moss can be used but you have to keep your eyes on the moss condition. Water your plant when the moss is crispy dry at the surface.
Here is photo of my plant(same plant posted on other thread before I divided and mounted this spring) that was potted in moss: