I surely am not an 'orchid expert' by a longshot, but I may add a few words from my experience. I am an American living in Chaiyaphum Thailand. Right now we are experiencing the hottest weather on record. +40C (+100F) every day with absolutely no rain in the last three months. Our natural water supply (a lake/resoivoir) has totally dried up so we (about 2,000 Thai residents/homes) have no running water. Our community is resourceful and we have water from farmers fields trucked in every day.
Anyway, I have about 40 different dendrobium plants all hanging. We do have very high humidity which is probably saving all our plants.
Yet all my plants (especially the dendrobiums) are doing just fine with a daily dousing of water. I put an aluminum wok/pan underneath the individual plant to collect and reuse the water again for the plants.
Dendrobiums will find their own way to use the water by any watering method.
I agree-- your plant looks very healthy and you shouldn't worry if each stem or bulb is getting enough water.
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