A twin row planter (10) comprises a drive (14) and a pair of planter units (16,18) powered by the drive (14). The planter units (16,18) include seed metering wheels (66,68) that are synchronized to discharge seeds in a predetermined staggered pattern along a harvesting row. One of the planter units is adjustable relative to the drive so as to achieve the desired pattern. In particular, the adjustable planter unit includes a connector that is configurable into a plurality of discrete indexing positions. The connector positions determine the relative angular offset between the metering wheels and, thereby, control the spacing of seed within the pattern.
