Links to more information
- DNR Seed Zones webpage – This website has maps and descriptions of the seed zones for some of the more common tree species.
- USDA NRCS Plant Materials Program
- Washinton Hardwoods Commission
- Western Hardwood Association
- Washington Native Plant Society
- Society for Ecological Restoration Northwest Chapter
- WSU Puget Sound Forest Stewardship
- Plantas Native – Native Seed