The ornamental design for a propagationtray, as shown and described.
FIG. 1 is a front perspective view of a propagation tray;
FIG. 2 is a front view of the propagation tray of FIG. 1;
FIG. 3 is a side elevation view of one side of the propagation tray of FIG. 1;
FIG. 4 is a side view of the propagation tray of FIG. 1;
FIG. 5 is a top perspective view of the propagation tray of FIG. 1;
FIG. 6 is an enlarged detail view of one end of the propagation tray illustrated by area 6 circumscribed within FIG. 5;
FIG. 7 is a bottom perspective view of the propagation tray of FIG. 1; and,
FIG. 8 is a perspective view of the propagation tray of FIG. 1 in a use configuration with environment lines.
The dot-dash-dot broken lines in FIGS. 5 and 6 depict the boundaries of the enlargements that form no part of the claimed design. The evenly spaced broken lines in FIG. 8 depict environment subject matter that forms no part of the claimed design.