Growth device for crop, use of such a device, and a series of growth devices

1. A growth device for crop, comprising a panel-shaped structure, a substrate included in the panel-shaped structure for receiving crop, and at least one water reservoir included in the panel shaped structure, wherein the water reservoir extends substantially above a bottom side of the substrate in a vertical position of use of the growth device, the growth device further comprising connecting means to bring the water reservoir in communication with the substrate for moistening the substrate, wherein the connecting means comprise a bottom reservoir extending substantially under the substrate, and wherein the connecting means are further provided with a water flow regulator to regulate water flow from the water reservoir to the bottom reservoir extending substantially under the substrate,

wherein an underside of the substrate facing the bottom of the growth device is in direct contact with water present during use in the bottom reservoir, such that this water can be sucked up into the substrate.

2. The growth device according to claim 1 , wherein the water suction means comprise one or more water suction cords or capillary means.

3. The growth device according to claim 1 , wherein the water flow regulator is designed to work autonomously, without supply of electrical energy.

4. The growth device according to claim 3 , wherein the water flow regulator is designed to work under the influence of gravity.

5. The growth device according to claim 1 , wherein the water flow regulator comprises valve means.

6. The growth device according to claim 5 , wherein the valve means comprises a regulating valve for closing off a water passage in a closed position and releasing it in a release position, while the position of the regulating valve is controllable under the influence of a float located in the bottom reservoir and coupled to the valve.

7. The growth device according to claim 6 , wherein the float is coupled to the valve via an operating arm.

8. The growth device according to claim 1 , wherein the panel-shaped structure is provided with a framework surrounding the substrate and the water reservoir.

9. The growth device according to claim 1 , wherein the panel-shaped structure is provided with support means extending behind the substrate.

10. The growth device according to claim 1 , wherein the substrate is of panel-shaped design.

11. The growth device according to claim 1 , wherein a height of the water reservoir is at least equal to half a height of the substrate.

12. The growth device according to claim 1 , wherein the water reservoir extends at least partly or partly above a top of the substrate in a vertical position of use of the growth device.

13. The growth device according to claim 1 , wherein the substrate is designed as a cassette, wherein the cassette is removably included in a receiving opening in the panel shaped structure.

14. The growth device according to claim 13 , wherein the cassette comprises a plant receiving part and a rear part, and wherein between the plant receiving part and the rear part, at least one capillary cloth is provided.

15. The growth device according to claim 1 , wherein the substrate is provided with a number of mutually spaced apart openings for receiving crop.

16. The growth device according to claim 1 , provided with an aerator to aerate the water reservoir.

17. The growth device according to claim 16 , wherein the aerator is provided with an upstream air inlet.

18. The growth device according to claim 17 , wherein the upstream air inlet is located in the bottom reservoir to receive air therefrom when the water level in the bottom reservoir reaches a threshold value.

19. The panel-shaped structure according to claim 1 , wherein the panel-shaped structure is provided with a first cavity for receiving said substrate, and at least a second cavity for the water reservoir, and wherein said connecting means is included in said first cavity.

20. A growth device for crop, comprising a panel-shaped structure, a substrate included in the panel-shaped structure for receiving crop, and at least one water reservoir included in the panel shaped structure, wherein the water reservoir extends substantially above a bottom side of the substrate in a vertical position of use of the growth device, the growth device further comprising connecting means to bring the water reservoir in communication with the substrate for moistening the substrate, wherein the connecting means comprise a bottom reservoir extending substantially under the substrate, and wherein the connecting means are further provided with a water flow regulator to regulate water flow from the water reservoir to the bottom reservoir extending substantially under the substrate, and

wherein the substrate is provided with water suction means which reach from the substrate into the bottom reservoir to draw water therefrom.

21. The growth device according to claim 20 , wherein an underside of the substrate facing the bottom of the growth device is in direct contact with water present during use in the bottom reservoir, such that this water can be sucked up into the substrate.