Understanding how invasive plants adapt to variable habitats can improve our ability to manage existing invasive populations and predict future invasions. Thus far, variability in aboveground traits have demonstrated the capacity for cheatgrass (Bromus tectorum L.), an invasive annual grass, to adapt to a wide range of habitat conditions. This project asks if root architecture shows similar trait variation, and if this variation associates with habitat climate. A global panel of genotypes was grown in a common garden in the Great Basin (Idaho, USA). Root-rhizosphere samples of three-leaf seedlings from 15 of these genotypes were collected, and root architecture was scanned. A Principal coordinates analysis was used to examine the associations between cheatgrass root architectural traits, as well as environmental conditions from the genotype site of origin. The preliminary analysis suggests that root architecture of genotypes from arid climates shows adaptations characteristic of drought adaptation. Future steps include amplicon barcoding of the rhizosphere microbiome associated with these samples and a greenhouse rhizobox collection of intact root-rhizosphere systems.