Not worth the $ as a soil surfactant, unsure as humectant
By Adam on 08/30/2015
I tried this on some heavier clay soil. For the day or two after application, it did make a big difference in water absorption into the soil. By two weeks after application, water was once again flowing on top of the soil rather than being absorbed. As for humectant effects, we've had rain regularly over the last month, so impossible to tell any difference. May test during peak summer stress next year, but at $30 for one application to my whole yard, it is a big "maybe."
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