Along the back fence of my garden I have a tricky spot. A dry woodland border of sun that’s tucked under fir trees. The ravine behind the fence slopes up and the fence intersects where the wild woodland ends and my cultivated area begins. So it’s the edge of a woodland, but sunny, and hot. Very very hot. The soil is sandy and drains instantly. Growing plants there has been difficult. Sandy Acidic Soil in Full Sun Normally, we Northwest gardeners don’t mind soil that’s sandy or acidic. It’s better…