The ornamental design for a gardeningtoolhead, as shown and described.
FIG. 1 is a front view of a gardening tool head showing my new design;
FIG. 2 is a rear view of the gardening tool head;
FIG. 3 is a right side view of the gardening tool head;
FIG. 4 is a left side view of the gardening tool head;
FIG. 5 is a top view of the gardening tool head;
FIG. 6 is a bottom view of the gardening tool head; and,
FIG. 7 is a top front side perspective view of the gardening tool head.
The broken tines are included for the purpose of illustrating portions of the gardening tool head and forms no part of the claimed design. The dot-dash broken lines in FIG. 7 are for the purpose of illustrating a symbolic break. The portion between the break lines forms no part of the claimed design.