As I may be going to live long enough to go on me holliers after all,
is there a method of watering my balcony plants in any way similar to
this?

A large plastic milk bottle full of water on my balcony floor, with a
tube from it going straight up the wall to plants on shelves.
Is it possible to apply anything like the right kind of pressure
without recourse to electricity and pumps?
--

Mike