Hopefully these pics will show why this is so critical. We've had a 20-30% chance of rain EVERY afternoon for the last week, and here is my moisture graph:
The zone didn't water yesterday, went drier than the MAD, and then based on the forecast, decided not to water again today -- it's now 7pm, and the rain appears to be missing me yet again.
Here's how my hydrangeas looked this morning. From what I've been able to research, it's not bad if it wilts a bit during the day but recovers by the morning. This one (along with all my other hydrangeas) did not recover overnight. Luckily I was home to observe this, and I was able to run the zones manually. But I'm soon going to be out of the country, 5 time zones away, with spotty internet service. I am just hoping that everything will survive.