Manufactured soilsâ€”formulated to provide highly predictable and consistent performanceâ€”are a means to stretch topsoil resources while also improving the horticultural performance and sustainability of soil environments. Today, many landscape architectural designs must use manufactured soils to meet sustainability and high performance project requirements. Bob Pine and John Swallow have designed manufactured soils for projects throughout the United States and worldwide. They will describe the opportunities and challenges of modern soil design with the objective of helping landscape professionals better understand their options and the process of specifying and using these soils, on Wednesday, March 23, beginning at 6 pm in the Hunnewell Building at the Arnold Arboretum, Jamaica Plain, Boston. Offered with the Boston Society of Landscape Architects. Fee: $25; Free to BLSA and Arnold Arboretum members. To register, call Marc Devokaitis at 617-384-5209, or email firstname.lastname@example.org.