Not all lumber is the same, and you can't expect to hammer a few random planks of wood together for a fence that will last. Some may have beautiful appearances, but will rot away without proper treatment—or may not take well to treatment at all. Here are a few wood options to understand what you're getting aside from just the appearance.
One of the most expensive and sought-after wood types is redwood. The color is vibrant, and it's one of the strongest, heartiest lumber types available to the mass market.
Money is the only object here, but you will still need some wood treatment for redwood fencing. Although wood rot and insect infestation is a bit less likely with redwood, it can still happen, and the effects will ruin the appeal of the wood far worse than most other wood fencing materials.
Rot is noticeable on almost all other mainstream fencing options, but redwood's reddish-brown appeal is its major draw. When fungal rot and other forms of decay and infestation take over the wood, it changes to a grayish color that looks worse than going with the cheapest pine or spruce. Make sure that any redwood is treated with clear stain or weather treatment coating to protect your investment.
This is a strong, dense wood that is often used for horse corrals. Horses chew on pine posts and can get through it fairly easily, but black locust seems to be a less tasty chewing option and can stand up against abuse.
The maintenance required for black locust is fairly low, which can make up for the slightly higher than average cost. When using black locust as a fencing material, be sure to have it professionally cut or take a course in cutting the wood properly. Due to the strength of the wood and the cellular make up, it's easy to splinter, unevenly cut, and tear the material without a proper blade speed and cutting angle—and this doesn't necessarily mean going with the strongest saw on the market.
Weather treatment can become a chore, and it's easy to miss a fading layer of wood treatment after months have passed. If you want a sturdy wood that can last long enough for you to forget a few seasons between treatment, white oak is your option.
The only major downside of white oak for its price point is that it warps and bows easily. This means that any fences you build should avoid tension, such as tying fence boards or banding the boards unless you want some intentional wood curve.
Contact a custom fence professional at a company like York Fence Co for wood fencing options that go beyond just a few planks of pine.