A wheel assembly for a multi-row planter comprises a wheel, a connection assembly, and a piston assembly. The connection assembly has a mounting surface adapted to engage a mounting bracket for mounting to a planter bar. The a piston assembly is adapted to permit movement of the wheel assembly between a first folded position and a second extended position. The wheel assembly is slidably coupled to the planter bar such that it may be slidably positioned at any point along the full lateral length of the planter bar.