A planter was modified for improved flexibility for planting experimental potato plots. The resulting plot planter is a two-row implement that can be adjusted for individual row seed piece spacing and fertilizer rate settings. Hoppers on the planter are equipped with clean-out doors. Uniformity of seed piece spacing was quantified by determining the number of skips and doubles and the coefficient of variation of spacing during planting. The results indicate that the planter performed well when compared to either an older plot planter or to commercial planters.