Soil, Mulch, Compost and Fertilizing

Build healthy soil with compost and mulch

Healthy plants grow in healthy soil, growing deeper roots in soil that holds more water and nutrients. So building your soil is the best way to save water and work in your lawn and garden. Learn about:

Quick tips

More Information

Growing Healthy Soil guide (pdf)
Get to Know Your Soil (pdf)
Composting at Home guide (pdf)

Questions? Call the Garden Hotline at (206) 633-0224 or email

Links to Other Sites

Seattle Public Utilities’ Backyard Composting has extensive home composting information

Soils for Salmon for landscape designers Building Soils for builders show how to protect and restore soil on construction sites, to meet Washington State’s requirements