What happens next?

How to clean a wood fence
Cover the ground around the fence with plastic.
If you have plants you care about or you decide to use a chemical cleaner, you'll want to cover the area around the fence with plastic. Go to your local hardware store and purchase enough plastic sheeting to cover the plants and grass up to at least 3 feet (0.91 m) from your wood fence.

OPT: -- Lightly tap the plastic all over the area. Use an electric drill to separate the plastic from the wood and add it to the ground.. -- Avoid insulating your fence area with plastic sheeting. This does not give the chemical cleaner a chance to seep down through the plastic and into the ground.. -- At minimum, cover the entire fence with plastic, especially when it rains. Leave at least an inch of excess plastic at the bottom for drainage.. -- Purchase just enough plastic for one section and move it with you when you move to the next to save money. Remove heavy debris with a wire brush..
Purchase just enough plastic for one section and move it with you when you move to the next to save money. Remove heavy debris with a wire brush.