CRATUS
ActivePittosporum tenuifolium Gaertn. · Kohuhu
Jeffrey Wayne Elliott
Variety traits
Winter hardiness of kohuhu, tawhiwhi
Pittosporum tenuifolium Gaertn.
The winter hardiness of the species is determined by its ability to withstand temperature drops down to -5…-10 °C, which limits its outdoor cultivation to USDA hardiness zones 9–10.
In the reference 3 varieties crop Kohuhu, where this is mentioned in the description.
For this plant, the critical factor is the combination of freezing temperatures and desiccating winds. At temperatures below -10 °C, the aerial part suffers severe damage, including browning, leaf curling, and dieback of young shoots, as well as root system freezing in containers.
In regions with borderline temperature conditions, it is recommended to place plants in wind-protected areas with a southern or western exposure, and to mulch the root zone. When grown in containers, plants require relocation to indoor areas with temperatures ranging from +6 to +12 °C during the winter period.
General information about the subject — on the page Winter hardiness.
Varieties of Kohuhu mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.