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The recommended height for a garden fence depends on its primary purpose. For pest control, the necessary height varies by animal. To keep out small pests like rabbits, a fence should be at least two to three feet tall. If you live in an area with deer, you will need a much taller fence, at least five feet high, to prevent them from jumping over. If the main goal is privacy, the fence should be at least seven feet tall. For purely decorative fences, the height is a matter of personal preference.

In most cases, trees need to be protected from deer all year round. This is especially true if you want to protect small trees from deer or if you just planted some fresh, new trees. Once a tree is a few years old, you likely do not have to worry about protecting it from deer as it will be stronger and can handle a little damage.

The lifespan of a picket fence largely depends on its material. Wooden picket fences typically last 10 to 15 years with regular maintenance, while vinyl and composite picket fences can last 20 to 30 years or more due to their resistance to weather, rot, and pests. Metal picket fences often exceed 30 years, especially when properly coated to prevent rust or corrosion.

Pickets should sit at least 2 inches off the ground to encourage groundwater to flow underneath. Pickets can sit as much as 6 inches off the ground, but setting it any higher could let pets in or out of your yard unintentionally. These are not to be confused with the fence posts anchored underground with soil or concrete footing.