1. Seed tray, which comprises an upper base (3) from which a socket (1) having side walls, bottoms (6) and openings (5) located in correspondence with said upper base (3)； characterized in that the upper base (3) comprises through windows (4) located in areas of confluence of groups of four alveoli (1).1. Bandeja semillero, que comprende una base superior (3) de la que arrancan unos alvéolos (1) que tienen unas paredes laterales, unos fondos (6) y unas embocaduras (5) ubicadas en correspondencia con dicha base superior (3)； caracterizada porque la base superior (3) comprende unas ventanas pasantes (4) ubicadas en unas zonas de confluencia de grupos de cuatro alvéolos (1).
