One of the most important steps in planning a restoration project is careful selection of ecologically adapted native plant material. As species-specific seed zone maps are not available for most species in the Artemisia tridentata ssp. wyomingensis (Wyoming big sagebrush) ecoregion in the Great Basin, USA, we are employing a provisional seed zone map based on annual precipitation and mean maximum daily growing season (April through September) temperatures. We plotted known populations of three potential restoration species over this map to demonstrate its value as a decision support tool for identifying populations of each species that may be used individually or pooled to create restoration seed sources for immediate use or for seed increase. Provisional seed zones may also be used with other resources to identify in situ conservation sites and collection gaps for ex situ conservation or genecology research.