The adobe garden bed, seat and oven are examples of using local resources to create a garden feature. These features were each created with volunteer labor.
Recipe for creating adobe mix (adapted from Education for Sustainable Living, 1999)
1. Ingredients – Cement and Earth – clay, rotten rock, river sand, sawdust etc. The earth needs to have a minimum of 30-50% grit content or courser material. Texture and strenght can be added with string, straw, bamboo, cabbage tree leaves, etc.
2. Ration – 1 part cement to 7-20 parts earth. The ratio depends on how strong or how fast you want it tot set. 1:10 or 1:15 is common. Think about the end use of the structure, will it be load bearing?
3. Mix the cement and earth well. Add water a little at a time, avoiding cement lumps