Instruct: Classify Amazon reviews into positive or negative sentiment
Query: San Francisco microclimates explored by masters

Local master gardeners lend their insights on the peculiarities and special needs of California Bay Area gardens in BAY AREA GARDENING: 64 PRACTICAL ESSAYS BY MASTER GARDENERS. The San Francisco Bay Area's unique attributes, from mild climate and microclimates to changing soils, lends to a diverse gardening environment in turn: these essays are critical to understanding the Bay Area's special needs and should be on the reading lists and in the libraries of any local gardener.