While we are now back in the oven with temperatures in the 90s during heat wave number six, last week provided a welcomed respite from this tough summer weather. Most of us focus on these daily high temperatures, however the nighttime lows can be equally important to the turf.
Below is a chart showing the temperatures of #1 green at a 2" soil depth from the end of July through the first week of August. Suffice it to say that when the "coolest" the rootzone gets is 80 degrees at night, there is pretty much zero chance of any recovery from the daytime heat.
In contrast to the end of July, the beginning of August actually had some daytime high soil temps peak at around 80 degrees, accompanied by much cooler nighttime low temperatures in the 60s. This may have been just a quick break for the turf, but we will take it.
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