Melilotus officinalis Melilotus officinalisCommon name(s): Yellow Sweet Clover, Yellow or Ribbed or Common MelilotSynonyme(s): N/AOrigin: Europe to Asia, naturalized in other regions.USDA hardiness zone: 5 (-23 °C / -10 °F)Height: Up to 1 meterMore infos: N/A