As a courtesy to gardeners in the Chelan and Douglas counties, Washington area, the Master Gardeners Plant & Insect Clinic maintains lists of select services and local suppliers. These include:
- ISA Certified Arborists (pdf) – current as of March, 2025
- Soil, compost, mulch, bark, rocks, sand, gravel sources (pdf)
- Soil analysis laboratories (pdf) – current as of April 2024
If you know of other companies that provide these types of services, contact our Diagnosis team.