6The Montana Gardener's Companion explains how to identify and address common shortcomings of Montana soils, including alkaline soils (the most common soil in Montana), acidic soils (found in some soils in the mountains and near Great Falls), and salty soils (found especially in eastern Montana and in areas west and northwest of Great Falls east of the Divide and in the far northeastern portions of Sheridan County). This book explains the different climates of eastern and western Montana, the effect of elevation on growing seasons, and how Montana gardeners can lengthen their growing seasons through careful plant selection, choosing the correct exposure, planting properly on slopes and using season-extending products.