| 摘要 |
A grow tube formed from a sheet of thermoform polymer to include a plurality of longitudinal ribs that protrude in a first direction normal to the plane of the sheet. When rolled into a grow tube, the ribs can extend radially inward and act as cushions that prevent the stem of the resident plant from colliding with or resting on the continuous rim of the grow tube. The ribs can also define vertically oriented channels that are open to the interior of the grow tube. Natural convection currents develop in the channels, promoting air exchange between the interior of the grow tube and the surroundings. The ribs can promote diffusion of the incoming sunlight. In one embodiment, the grow tube includes snap forms that overlap when the sheet is rolled into tubular form to provide a flangeless grow tube.
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