An enhanced-stability, A-frame-shaped plant support for the support of plants such as tomato vines, or other fruits and vegetables growing in soil which, while supporting plants laden with heavy fruits or vegetables, is stable and greenhouse tent wind-sail resistant, in part because of a readily usable starting width gauge indicator on detent latch members operable to controlling the ultimate width between pivotable opposing halves of the plant support during installation to a desired depth in the soil. After use, when removed from the soil, the A-frame-shaped plant support collapses, pivoting about preferably hog-ring type interconnection rings between the opposing halves of the plant support for facilitating easy removal from the ground and folding flat for easy storage.