To Let Wither
To Kill A Plant, To Let Something Dry Up
transitive verb, godan verb
からす
枯らす （からす） To Let Wither, To Kill A Plant, To Let Something Dry Up
烏 （からす） Crow, Raven
枯れる （かれる） To Wither, To Die
枯らす only ever means To Let Dry. To Kill only applies to letting vegetation dry. To Season only applies to letting lumber dry over the course of multiple seasons.