In case you thought I was clever
So I figure "Wow, each one of these solenoids is kinda expensive, but I'm right clever, bet I can get more zones with fewer solenoids using some kinda fancy maths and a clever arrangement of pipes."
A matrix! Yaknow, like how Williams used a lamp matrix in their games? Six transistors could supply nine bulbs - you'd have 3 transistors switching power, and 3 switching ground, and to turn on one bulb you'd turn on its power and ground transistors, one to let the electrons in and one to let them back out again.
you mean you were drawing up a plan to have one coil to let the water into the vegetables AND ANOTHER ONE TO LET IT COME BACK INTO THE PIPE
YEAH 'CAUSE IT'S GOTTA COME BACK TO MAKE A CIRCUIT DUH