9. Cilantro
Average price per bunch: $1.53 (organic)
Cilantro can be easily grown indoors as well as outdoors. Since you are already researching market for the most profitable crops to grow on a small farm, you can also check whether cilantro (fresh leaves) or coriander (dried leaves) is on the greater demand. Anyhow, it is a great recommendation as a side crop to grow, since it requires minimal space and requirements.