Growth device for crop, comprising a panel-shaped structure (1), a substrate (2) included in the panel-shaped structure (1) for receiving crop (3), at least one water reservoir (4) included in the panel-shaped structure (1), connecting means (6) to bring the water reservoir in communication with the substrate (2) for moistening the substrate (2), wherein the water reservoir (4) extends substantially above a bottom side (B) of the substrate (2) in a vertical position of use of the growth device. WO 2014/077684 PCT/NL2013/050816 2 la 3 1g 11 K 1b4- - -1d 4-H lb 12 1c w Fig. 1 11 2 T 1g 1a 4 K -iJ 4b 1b 1b 4a 1h 4a - lh -HI 6c 6d 6b-" , ,..-._6b 6 6e B H2 1c 6a 12 Fig. 2