A grow tube includes a first side, a second side, a first end portion, a second end portion, a first edge portion, a second edge portion, and a vent. The second side is opposite the first side, the second end portion is opposite the first end portion, the second edge portion is opposite the first edge portion, and the first and second edge portions and the first and second end portions define the first and second sides. The vent extends between the first side and the second side and comprises a flap and an opening. The vent can be V-shaped in some instances. The grow tube can also include one or more locking tabs and/or adjustment mechanisms, which allow the grow tube to be moved between tubular and flat configurations and/or allow a diameter of the grow tube in the tubular configuration to be adjusted, respectively.
