Here in southern Wisconsin we’ve only received 0.14″ of rain in June, and the month is already half over. Any part of the yard that I do not irrigate (basically, anything not around the BTEP plot, my vegetable garden, young fruit orchard, or small reno patch from last fall), is now dormant.
I did let the BTEP go longer than usual without irrigation, to get an initial sense of the more drought-resistant cultivars. This is far from scientific, and all cultivars showed at least some level of drought stress, but there were three cultivars that looked significantly better than the rest. They are:
Interestingly enough, the one cultivar that specifically markets itself as a water miser, Diva, looked like one of the most stressed.
It looks like we will be getting some rain over the next couple of days. I will continue to monitor drought tolerance throughout the summer. Maybe the results will be different next time.