Royster-Clark's shareholders tendered 98.6 percent of their shares by Agrium's deadline on Wednesday February 8th, for a total purchase price of about $616 million.
"We are very pleased to have concluded this accretive acquisition and will immediately start the integration process in order to provide a smooth transition for our new employees and customers," Agrium CEO Mike Wilson said in a release Thursday morning.
"As the new industry leader in direct-to-grower agricultural retail sales, we are confident that we can create significant value for our customers, shareholders and employees."
Agrium said it intends to acquire the remaining common shares of Royster-Clark, as allowed under Ontario law.
Agrium is a major Canadian dealer in seed, chemicals and fertilizer.
Virginia-based Royster-Clark is a U.S. retail distributor of agricultural nutrients, seed and crop protection products, and provider of farm services to U.S. growers, with about $1.15 billion US in sales last year.