Spots and more spots

[silken]

I have also heard copper is not good for Dens. Haven't tried it tho.

[gngrhill]

Originally Posted by Ray

Leaf spotting is almost always a fungus. The spores are easily distributed by air movement, not just by water.

CaliMagic is a good product - I have sold tons of it over the last while - and can help "toughen up" the plants, but is not a cure. Give the Inocucor product a try, as it will introduce beneficial bacteria and fungi that can prey on the bad ones.

I did get the Inocucor from you on a couple of occasions. I got some with the kelp max last week. I have not used it regularly, but did water all of them with it today. Is once a month a good regime or advise me if it should be other. Thanks.
I will check out you web site for the CaliMagic to try also.

---------- Post added at 05:36 PM ---------- Previous post was at 05:35 PM ----------

Originally Posted by silken

I have also heard copper is not good for Dens. Haven't tried it tho.

I have also read not to use copper on Dens.

---------- Post added at 05:38 PM ---------- Previous post was at 05:36 PM ----------

Originally Posted by estación seca

Which Dendrobiums? There are a lot for which 55 F / 13C at night would be too cold. There are a lot for which that would be just fine.

Most are DenPhal hybrids, but a few are Aussies, and a couple of Latouras. (microchip and aberrans )

[silken]

I think those are mostly warm growing ones. Especially the Phal type. My winter greenhouse temps are similar to yours but a tad warmer. I keep my couple of warm growing ones on a heat mat away from any cold drafts and in as warm a spot as possible.

[gngrhill]

I thought I read somewhere that the Aussie Dens like it colder. I do have to balance because I have cool growers and warmer growers all in the same grow space. I am just trying to put the ones that like it cooler near the windows and the warm growers in front of the heater (radiant, not forced air ) where it tends to be warmer, and some of the little ones are on a heat mat. My biggest problem, I guess, is learning which really need it warmer and which need it cooler. I have mostly the Dens I mentioned and several Catts, and then the misc. other genera.