A one-piece, integrally formed tie apparatus is provided in which a line engaging portion releasably engages line (14) and a vine holding portion releasably loosely holds vines (19). The vine holding portion includes an elongate flexible arm (18) integrally depending from the line engaging portion and elastically deformable to define a loop. A spherical locking head is formed at a remote end of the flexible arm (18) and a complementary locking part (40) engages the spherical head to close the loop completely to surround the vines (19). The complementary locking part (40) is also responsive to application of predetermined amount of force to the flexible arm substantially in at least one direction, within the range of directions (75), to permit pulling of the spherical head out of its engagement with locking recesses (such as 56), in the pair of sidewall extensions (50, 52) and pulling of the spherical head between the sidewalls (46, 48). This opens the closed till loop and permits removal of the vines (19) whilst leaving the tie apparatus on the line (14).
