The grades of 3 Food Products stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

This week, Calavo Growers, Inc.’s (CVGW) ratings are up from a C last week to a B. Calavo Growers, Inc. markets and distributes avocados, prepared avocados, and other perishable commodities, as well as manufactures and distributes processed avocado products in the United States and internationally. The company also gets A’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of CVGW stock.

Blue Buffalo Pet Products Inc (BUFF) gets a higher grade this week, advancing from a C last week to a B. The company also gets A’s in earnings growth and return on equity. For more information, get Portfolio Grader’s complete analysis of BUFF stock.

This week, Adecoagro S.A. (AGRO) pushes up from a C to a B rating. Adecoagro S.A. engages in planting, harvesting, and selling grains, oilseeds, rice, wheat, corn, soybeans, cotton, and sunflowers to grain traders; and provision of grain warehousing and conditioning, and handling and drying services to third parties. For more information, get Portfolio Grader’s complete analysis of AGRO stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.