Paph & Dendrobium Question

[Bribri]

I need some tips or tricks for 2 different types of orchids I have.

1) My dendrobium 'little green apples'
- Ordered online and have had it in my collection for 2 weeks
- Has 2 buds, they seem to be drying out (bud blast??)
- Facing east in my windowsill
- Watering every 10 days, I let the medium dry out completely. (My humidity is low so the medium dries out within 3-4 days)




Question: Am I watering enough and is the drying of the buds, bud blast? Or is it possible for them to still bloom?
I've read and re-read info on dendrobiums but I feel like I'm missing something. Do I need more patience or is it a slow blooming/growing orchid in general?

2) Paph Hsingying red apple x shin yi heart
- Has been in my collection for almost 2 months
- No changes or growths
- North-east facing window with my phals
- I keep medium damp to almost dry



Question: Again, do I need to keep patient or are my conditions not right for a paph?

I seem to be doing pretty good with my phals and oncidiums. They all have new growths and/or blooming. I feel stumped regardless how much I read or make changes to the environment.