any tips, tricks or cheats on how to make one?
I'm going away fro a fortnight and I have a 10 X 7 greenhouse to water,
tomatoes and chilli plants, some in bags and some directly in the soil.
I have access to lots of tubing etc and time, but very little in the way of
spare cash (need it for my hols!)


TIA

--
Phil L
RSRL Tipster Of The Year 2008