Many years ago I had a watering system somewhat like that for my
greenhouse experiments: one pot was on a scale, and when it lost a
certain amount of weight, it triggered a drip irrigation system for the
whole bench. Obviously, this will only work for potted plants that all
weigh the same, and as I remember, it didn't work very well, period.
Now my experimental plants are on a timer and they can be programmed to
get watered once a day or twice a day, for 1-5 minutes, and if they're
in a big pot, they can have 2 or more emitters. That gives me lots of
wiggle room.

As for my bonsai at home, I have too many to be fussy: the darn things
get watered once a day. They are in a well-draining mix. End of
story.



Gary Huff wrote:
I enjoy the traditions of bonsai as well as the next guy, but I am experimenting with using the
weight of a bonsai to determine when to water them by incorporating a little technology. +++++