Azospirillum canadense is a free-living nitrogen-fixing alphaproteobacterium in the family Rhodospirillaceae, first isolated from Canadian corn rhizosphere soil. It is capable of colonizing plant roots and fixing atmospheric nitrogen, potentially stimulating plant growth as a biofertilizer. Like other Azospirillum species, it produces phytohormones including indole-3-acetic acid that promote root growth and nutrient uptake.