While the appeal of cilantro's flavor may be up for debate, one thing we do know is that cilantro is a cool-season herb. As the temperatures rise, culantro is a savory alternative. This herb grows best in summer heat and thus fills the flavor void for cilantro lovers who still want garden-fresh flavor.Culantro (Eryngium foetidum) is a biennial herb commonly grown in the Caribbean and Central America. In Puerto Rico, where it is used in a variety of dishes, it is called recao. Other names for this herb include Puerto Rican coriander, black Benny, saw leaf herb, Mexican coriander, fitweed, or spirit weed. Here's a fun fact: culantro is a key ingredient in the popular sauce sofrito, which also includes garlic, onions, and peppers.