CLAIM The ornamental design for a garden tractor enclosure, as shown and described.
FIG. 1 is a right front perspective view of a garden tractor enclosure showing my new design in use condition;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing around the perimeter of the windows in all of the figures is representative of stitching. The broken line showing of a garden tractor in FIGS. 1 5 is included for the purpose of illustrating environmental structure and forms no part of the claimed design.