Catch crop \Catch crop\ Any crop grown between the rows of another crop or intermediate between two crops in ordinary rotation in point of time. -- {Catch"-crop`ping}, n. Radishes . . . are often grown as a catch crop with other vegetables. --L. H. Bailey.
catch crop n : a quick-growing crop (e.g. lettuce) planted between two regular crops grown in successive seasons or between two rows of crops in the same season