For depth, Soilutions recommends:
- When preparing soil for new lawns or amending vegetable gardens: 3-4 inch depth.
- Topdressing established lawns and flower beds: 1/2-1 inch depth.
- New mulch applications: 4 inch depth.
- New raised beds and gardens: minimum depth of 16 inches.
If you are in-between round numbers, we recommend you round up. Always better to have a bit too much for a project than to wind up short. Plus, every plant in your yard will love a helping of compost, soil or mulch. Don't forget those bushes over there...