my greenhouse:
photo on the left was taken 4 weeks ago
photo on the right was the jungle I found when I got home from Japan!
(they look like different locations, but it is same photo taken from same position)

A few weeks before I went to Japan I set up two sprinklers on a timer, and tested them for 2 weeks to make sure they would be reliable. They never missed a beat, and I discovered just 3 minutes each morning was enough ‘rain’ so when I went to Japan I was reasonably confident that it would all be ok while I was away… but if it failed, everything would likely die!
I have documented the making of my greenhouse and will post it next week, as it has been a great long term project… Mine is fitted with a roof vent which auto opens when temperature reaches 15 degrees C… but while I was away I couldn’t open the door or window to let more air flow, so I was a little worried as to what might greet me on return. But wow – so much growth!! So great to be eating fresh veges from my garden!