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A detailed, species-specific comprehension of plant water behavior can be a central tool to improve water management in nursery production and irrigated landscapes. Potted plants of  Nerium oleander ,  Pittosporum tobira , and  Ligustrum japonicum  ‘Texanum’ were exposed to controlled increasing drought conditions in greenhouse. Water use, gas exchange, and foliar thermoregulation were monitored along the trial.  N. oleander  showed the most efficient response to increasing water stress, maintaining high levels of gas exchange and evapotranspiration rate during the whole trial, whereas  L. japonicum  emerged as the most sensitive species, with a significant drop in physiological performances already from the second day. The more aggressive water behavior of  N. oleander  can be compared to the one of anisohydric plants, whereas  L. japonicum  displays an isohydric strategy.  P. tobira  showed intermediate characteristics between the two other species. This work comes to provide useful tools for the management of irrigation in plant nursery and for decision making in the use of ornamental shrubs for landscape applications.

Hydraulic Relations and Water Use of Mediterranean Ornamental Shrubs in Containers