After struggling to gain consumer acceptance, Monsanto on Wednesday announced that it would try to sell its business of producing an artificial growth hormone for dairy cows. The company will focus instead on its thriving business of selling seeds and developing ways to improve crops.

The decision comes as more retailers, saying they are responding to consumer demand, are selling dairy products from cows not treated with the artificial hormone.

Wal-Mart, Kroger and Publix are among the retailers that now sell house-brand milk from untreated cows. Almost all of the fresh milk sold by Dean Foods, the nation’s largest milk bottler, also comes from cows that were not treated with the artificial hormone, a spokeswoman said.

Monsanto officials said the decision was not related to the retail trend and that business for the artificial hormone, sold under the brand name Posilac, remained brisk. Monsanto, which is based in St. Louis and is the only commercial manufacturer of the hormone, declined to provide sales numbers.