TUBEX VENTEX tree shelters are ideal for warmer climates as the shelter includes ventilation holes and a modified colour for light transmission. Early trials on tree shelters in warmer climates produced the expected improvements in establishment and growth, but this was tempered by concerns about insufficient stem diameter. As a result, Tubex undertook research in the early 1990’s through INRA in France and jointly developed the Tubex Ventex. The TUBEX VENTEX tree shelter improves growing conditions for trees by modifying the traditional balance of air (primarily CO2), air humidity and light to produce ‘optimum’ growing conditions where these elements are in ‘equilibrium’. These modified conditions are produced by the combination of specifically sized and positioned ventilation holes with the modified shelter colour and light transmission profile. Use a good quality stake driven into the soil to a depth of at least 30cm (possibly deeper in cultivated soil). Then, using the shelter’s natural strength, push it into the ground, filling in any gaps around the base. If tree fills shelter diameter before the normal degradation period (5 years +), consider removing the shelter or manually initiating the laser-line split. Due to its low positioned ventilation holes the Tubex Ventex is better suited to an environment where herbicide spraying is not extensively used.