Just an observation, I had always done over head watering, but was worried about how much was evaporating before being absorbed and powdery mildew. I took nozzle off and stuck in center of garden and found it traveled through the network of vole holes in my garden and spread throughout garden from one spot, I also always appreciated how voles aerate soil. They're only interested in eating my crops in the dead of winter when there's nothing else to eat so I leave them alone with the exception of the ones my cat gets. I just thought it was especially awesome that I had free irrigation tunnels in my garden.