More than 4 million acres of U.S. farmland now are devoted to organic agriculture, according to a new report from the market research firm Mercaris, a record that marks an 11 percent increase over two years ago. The number of certified organic farms is close to 15,000, rising just over 6 percent since 2014.

While it may not be shocking that hotbeds of consumer demand for organic food such as California and New York are among the leading states in the total acreage of organic farmland—with 688,000 acres, California is No. 1—that Montana, Wisconsin, and North Dakota round out the top five is something of a surprise. Montana’s 30 percent increase of 100,000 acres of organic acreage since 2014 bumps it into the No. 2 spot, while North Dakota’s increase of more than 40,000 acres pushes it past Oregon, which now ranks sixth. Colorado and Texas round out the top eight.

To be sure, the amount of organic cropland in the U.S. remains but a sliver of the total overall. Organic corn, wheat, and soybeans each account for less than 1 percent of the total number of acres planted with each crop. The largest organic crop, oats, accounts for 3.6 percent of all the oats grown in the U.S.

Read more