The present disclosure relates to a temporary immersion device (10) for growing crops (12) in a liquid substrate (13) and a respective method for temporarily immersing said crops. The device comprises a closed container (15) defining an inner chamber (18) suitable for housing the crops (12). A support member (20) is placed in the inner chamber (18) and is suitable for supporting said crops (12). The device further comprises an actuating pneumatic tool (24) comprising a casing (25) closed with respect to the inner chamber (18) and connected to the support member (20). The actuating pneumatic tool (24) moves the support member (20) between a first position and a second position on the basis of a variation of pressure in the casing (25).
