Embodiments of a hydroponic growing system include raft segments that can be reversibly attached together to form a raft. Rafts can have one or more plant holes to support a plant body, and one or more thermal chimneys to provide for gas transport from underneath the raft to the upper surface, to control temperature and humidity of the plant. Additional embodiments include wireless sensors that may or may not be part of a raft, and a growing environment control system that can receive data from one or more sensors of environmental conditions of a plant and in other embodiments, can detect discrepancies between the actual environmental conditions and desired conditions. In still further embodiments, a growing environment control system can automatically adjust an actuator to return an environmental condition to a desired state.
