Choosing the right seeds for revegetation projects can be a challenging decision for managers.
Comparing the weather conditions of a seed source to the planting site is a common guide for deciding which seeds to plant in the Southwest at a restoration site. However, a new study by the USGS Southwest Biological Science Center shows that climate is not the only factor that determines how well a plant survives.
Scientists tested several populations of three native southwestern plant species in an experimental garden to see how geographic distance from seed source, climate, and soil conditions affect survival. They found that moving seeds over long geographic distances led to lower survival for all three species. Additionally, each plant species responded uniquely to climate conditions, local soil texture, and soil pH of their new home.
Read the paper "Rethinking seed selection based on climate matching during restoration: Geography, soils and climate explain species-specific mortality" here:
doi.org/10.1017/dry.2026.100…
📸: SBSC technician Morgan Andrews collects native hairy false goldenaster (Heterotheca villosa) seeds for data and restoration research near Moab, UT in September 2021. Photo by Shannon Lencioni, SBSC, USGS.