As someone who loves plants and water, a note that https://www.regionalh2o.org provides some great local resources for Beaverton, Hillsboro, and Aloha areas. Perhaps the best part is the “Water-Efficient Plants of the Willamette Valley” pamphlet, found at https://www.regionalh2o.org/sites/default/files/Waterwise%20Plant%20Guide%202020.pdf
Big file but lots of good info!