Spruce fence is the least expensive of the wood fence options. Spruce is useful as a building wood, commonly referred to by several different names including North American timber, SPF (spruce, pine, fir) and whitewood .Because this species has no insect or decay resistance qualities after logging, it is generally recommended for construction purposes as indoor use only (ex. indoor drywall framing). Spruce wood, when left outside can not be expected to last more than 12–18 months depending on the type of climate it is exposed to. https://www.dfwfencecontractor.com/spruce-and-pine-wood-fences/