The answer to 'when to fence' is that the best time to install a fence depends on several factors, including your climate, the type of fence, and your landscaping needs. In general, the most optimal time to install a fence is during the spring or fall when the weather is mild and the ground is easy to work with.
Spring is an excellent time to install a fence as the ground is thawing and the weather is warming up. This allows the fence posts to be set firmly in the ground before the hot summer months. Fall is also a great time as the ground is still soft and the weather is cooling down, making it easier to work. Avoid installing a fence during the winter when the ground is frozen, as this can make it challenging to properly set the posts.