A trench closing assembly for a row unit of an agricultural planter, the row unit having a row unit frame supporting an opener disk for opening a seed trench in a soil surface as the row unit travels in a forward direction of travel, the trench closing assembly comprising: a main frame supported by and extending rearwardly from the row unit frame with respect to the forward direction of travel; first and second closing wheels (254-1, 254-2); and an actuator; wherein said main frame comprising: a connection bracket for mounting the main frame to said row unit frame; an attachment bracket connected to said connection bracket; and a frame member pivotally connected to said attachment bracket, the frame member having first and second side arms (1526-1, 1526-2), wherein said first closing wheel is rotatably supported from said first side arm on a first side of the open seed trench and wherein said second closing wheel is rotatably supported from said second side arm on a second side of the open seed trench, said first and second closing wheels (254-1, 254-2) configured to cooperate with one another to close the open seed trench with soil as the row unit travels in the forward direction of travel; wherein said actuator is supported between said attachment bracket and said frame member such that when actuated, said actuator causes said frame member to pivot downwardly relative to said attachment bracket thereby applying a down force to said first and second closing wheels (254-1, 254-2). a main frame supported by and extending rearwardly from the row unit frame with respect to the forward direction of travel; first and second closing wheels (254-1, 254-2); and an actuator; wherein said main frame comprising: a connection bracket for mounting the main frame to said row unit frame; an attachment bracket connected to said connection bracket; and a frame member pivotally connected to said attachment bracket, the frame member having first and second side arms (1526-1, 1526-2), wherein said first closing wheel is rotatably supported from said first side arm on a first side of the open seed trench and wherein said second closing wheel is rotatably supported from said second side arm on a second side of the open seed trench, said first and second closing wheels (254-1, 254-2) configured to cooperate with one another to close the open seed trench with soil as the row unit travels in the forward direction of travel; wherein said actuator is supported between said attachment bracket and said frame member such that when actuated, said actuator causes said frame member to pivot downwardly relative to said attachment bracket thereby applying a down force to said first and second closing wheels (254-1, 254-2). a connection bracket for mounting the main frame to said row unit frame; an attachment bracket connected to said connection bracket; and a frame member pivotally connected to said attachment bracket, the frame member having first and second side arms (1526-1, 1526-2), wherein said first closing wheel is rotatably supported from said first side arm on a first side of the open seed trench and wherein said second closing wheel is rotatably supported from said second side arm on a second side of the open seed trench, said first and second closing wheels (254-1, 254-2) configured to cooperate with one another to close the open seed trench with soil as the row unit travels in the forward direction of travel; wherein said actuator is supported between said attachment bracket and said frame member such that when actuated, said actuator causes said frame member to pivot downwardly relative to said attachment bracket thereby applying a down force to said first and second closing wheels (254-1, 254-2).