Abstract: A flexible, expandable putting green including interlocking panels. In various aspects of the invention, the interlocking panels are flexible pads or mats having a foam backing underlayer covered by a simulated grass surface overlayer. The interlocking panels provide flexibility in design to allow a user to construct a putting surface of any desired size or shape. At least one of the panels includes a removable portion that forms a hole in the panel into which a cup may be inserted such that it is recessed in the putting surface to receive a golf ball. In various embodiments, multiple panels may be compiled into a starter kit including materials for a basic putting green and expansion kits to provide unlimited expansion possibilities.