The tray (101) to hold plants, for storage and transport and watering, has a rectangular shape with a base (103) and side walls (105). Two holders (130) are at each of the parallel narrow sides (106a) for suspension at the struts of a wheeled frame. Each holder lies along the narrow sides, with a free end section towards the longitudinal sides (106b,106c) for suspension. Two of the holders are at the corners (120) of the tray. Two openings (107) carry out any water overflow.