Choose a turtle frame that is the same size, or smaller, than the boxwood you want to shape.
Set the turtle form over the center of the boxwood plant.
Thread the branches through the turtle frame so that the frame will sit firmly on the ground. You may need to gently bend some of the thin wires of the frame or clip some of the greenery.
Pull the branches through the topiary form so the form is covered by greenery.
Clip the boxwood into shape following the outline of the wire form closely.
Fill in empty spaces with boxwood clippings, or let the boxwood fill in the empty spaces as it grows.
Trim the turtle when it begins to loose its shape, usually every couple of weeks.