The weather has been unusual this year (2018), with the summer heat arriving over a month early, May rather than July. The plants have had a difficult time, especially the main vine which suffered heat stress along its main branch where the leaves have withered. I have been trying to find a drop-by-drop watering system for some long time, and eventually bought, at a heavily discounted price, a length of hose at Kips, one of the main hardware stores/ builders merchants. Unfortunately Kips had run out of the little sprinklers and nozzles to fit into the hose to allow the water to be directed where it is needed (if they ever actually had them – perhaps that was the reason for the heavy discount on the hose!. Will take a month to arrive, assuming they actually do order the parts, by which time we will have consumed an awful lot of water in more traditional ways of distribution (hose and watering cans).