A support frame for growing plants comprises a framework supporting a plurality of shelves 16, 16a, 16b, wherein the framework comprises two upright frame members 2, 4 at a left side of the framework, two upright frame members 6, 8 at a right side of the framework opposite the left side, a first cross member 11 connected to and spanning between the two upright frame members at the left side of the framework, a second cross member 12 connected to and spanning between the two upright frame members at the right side of the framework, and a shelf support member 14 connected to and spanning between the first and second cross members. A first end of the shelf support member rests and/or is retained in a cradle of the first cross member, and is removable and attachable therefrom. The cradle maybe positioned in a cavity of the first cross member, the cavity having an open side facing towards the second frame members and a closed side opposite the open side
