Gulf Coast Humidity: Where Gel Lasts Longer and Mould Arrives Sooner

A landscape contractor in Houston planted 220 live oaks and crapemyrtles along a commercial frontage in October, with 60 g of gel per tree in a 90 litre backfill. The trees did well through winter. In June, three months of 90 percent relative humidity and 120 mm of rain a month arrived, and by Augus…