| Hi Sharyn,
To clarify, there is no such thing as a "Yamamoto-type" Den. in the sense that we have phal-type and nobile-type Dens. Yamamoto is a famous grower and breeder of nobile-type Dendrobiums (as you probably know). So if someone says they have a Yamamoto Den it means it came form him, not that it's a particular kind of Dendrobium as being seperate form nobile or phal or other types of Den. You probably know all this but I just want to keep things clear for anoy others who happen to be reading the thread.
I have read posts form Jerry indicating that nobile-type Dens that come from Yamamoto are not as particular about their dry period and don't seem to be adversely affected by year round watering (although less in winter). They are, nonetheless, nobile-types and so that should probably be the point of reference for culture.
The thing about not fertilizing from August on (Northern Hemisphere) comes from the fact that many nobile-types will throw keikis instead of bloom if they receive too much nitrogen in Autumn/Winter. I don't know how much nitrogen worm tea contains. As it is usually used in a fairly diluted state, I wouldn't think it would contain much. Hopefully Jerry will be along soon to comment.
Cheers
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