Now, the title does say "Arduino Powered" vertical garden, so I suppose I should get to the Arduino part. I haven't actually started on that part yet, though here are my plans with it. I'm going to hook at solar cell scavanged from a solar powered deck light to the analog input of the Arduino for use as a sun meter. The more voltage I see on that analog input, the brighter it is outside. I live in Florida, so it's always humid... The brighter it is, the more water I need to hit the plants with.
I was originally going to use a simple garden hose timer to water everything, but given I have the yard sprinklers on another Arduino Mega in the house anyways, I might as well hook this up as well.
Anyways, I'm having a tough time finding local suppliers of 3 3/4" net pots to fit in my 3 1/2" holes. So I'll have to order them online and wait for a bit. On the bright side, my Home Depot had Dig brand drip irrigation supplies on sale for about 80% off! 50ft rolls of 1/4" microtube for $0.99 instead of $4.99, score!