plato_03:
-to avoid needing individual pumps and lines for each plant, decide to only use a single pump that can deliver strong pressure, and splitting the water line into 16 water lines with solenoid valves connected to each line... in this way the solenoids can control each individual line instead of individual pumps.
Couldn't you just use a servo motor, attach a pipe and code it so it points to each plant?
Something like this?