The objective of this work was to evaluate soybean r(Glycine max (L.) Merr.)] genotypes adapted to tropical conditions for their potential commercial use in Puerto Rico. Twelve experimental lines and three cultivars of Maturity Group VI and later maturities were planted at three locations in two planting seasons during 1988 and 1989. A randomized complete block design with four replications was used at each planting. Data were collected on dates of flowering and maturity, plant height and seed yield. Significant differences in seed yield among entries were observed between years and planting dates and locations. None of the experimental lines were superior in yield to the cultivars used as checks. The importance of continued variety and experimental line evaluation for Puerto Rico is discussed.