An anchor for securing the lower end of lift cords to the bottom rail of a vertically retractable covering for architectural openings includes features enabling the anchor to be wedged into a blind hole formed in the top surface of the bottom rail. The anchor can be one piece or two pieces and in the event of a two-piece anchor, a main body has spreadable legs and is engaged by a cam member to spread the legs after the anchor has been inserted into the blind hole. In the case of the single-piece anchors, there are legs or fingers engageable with the side wall of the blind hole upon insertion of the anchor into the blind hole to wedgingly secure the anchor in position.