Abstract: A multi-section enclosure adapted to support an artificial environment for growing plants. Vertical edges of opaque and transparent wall sections interlock with one another and horizontal edges mount to formed channels at a domed cover and support base. A sliding door cooperates with slide spacers fitted about an opening at the transparent wall. A plurality of hangers are suspended from a transparent divider panel which separates an internal illumination source and reflector from a growing space. Slide shutters mounted to vent apertures at the divider and cover cooperate with a fan at one of the divider apertures to control internal air circulation and temperature within the growing space. The spaced door and cover vent control make-up and exhaust air flow.