Greenleaf Forestry & Wood Products DOES NOT offer pressure treated wood, but we suggest locally applied wood preservative where it is needed (specifically where the wood can get wet from the elements).
Near or in the ground - The best treatment is copper napthenate. See www.poles.com for the description of the product and purchase information.
Above ground treatment - We suggest Total Wood Protectant (TWP) 1500. This can be found online at www.usetwp.com/products/twp-1500-series/. It comes in many different colors. Soak it in and re-apply every few years.