OK, I've got some water in place though at 1000 litres it'll need topping up (by Michel) during the season. Some lessons learned from the very first season's watering. A good concept (reasonable tree growth and also some fruit) that needs much more work. The homemade watering collars need to drip, not flow. Putting nutrient in the tank is a bad idea. Light, warmth, water and nutrients leave the tank full of green scum at the end of season. Karchering that lot out wasn't fun. So for 2011 the plot was brown dripper hose collars around the trees. Osmocote around the trees and clean water in the tank. Camouflage netting over the tank to reduce the light. That's why they sell black tanks but you'd then have to paint it white. The 2011 result was quite encouraging. Reasonable crop of Concorde pears, Spartan equivalent apples and the Victoria plums had been eaten by the time we got there. However the very low pressure means that there is only so many trees that one can irrigate at a time. So the current plot for the 2012 season involves two Gardena timers, each with a sensor and doing half the trees each. The current tree count is, at various levels of maturity. One good and one not so good Victoria. Bird cherry, Stella cherry, rose and yellow cherry and a white cherry (theory is that the birds can't see it. Two apples. Nectarine. Vine peach. Agen plum. Concorde and William pears. Greengage. Fig. Mulberry.