It was high eight degree and cloudy in the afternoon. I worked on relocating wild rose plants to set up green fence on the food garden. Food garden in Permaculture should have tall plants and trees around the edge of farm land to serve as fence and protect intruders, block heavy winds. Trees are natural water pump that regulate moisture of soil. They are the foundation of nature biosphere, especially food garden. The more tree the garden has, it becomes more productive and healthy. Birds which are natural predators of insects need trees.