The ornamental design for a planthanger, as shown and described.
FIG. 1 is a perspective view of a plant hanger showing my new design, the
broken-line showing of the flower pots being for illustrative purposes
only and forming no part of the claimed design, the top hook element being
shown broken-away to indicate indeterminate length;
FIG. 2 is a side elevational view thereof, the side opposite being a mirror
image; and