I bet this will probably be perceived as the most stupid question ever asked, but i kept banging my head over it anyway.
One of my kumquats is grafted on a volkamerian rootstock, which is said to have a low cold hardiness of about -2 °C, but the scion is a nagami kumquat and kumquats are sead to be cold hardy to about -7°C (give or take, i may be a degree or 2 off but anyway)
My question is, does the scion take the cold hardiness of the rootstock (in this case, would it die at -2°C) or do both parts have different temperature tolerances?
With poncirus trifoliate i already know the scion inherits some of the cold hardiness but I don't know how it works when it is the other way around.
and yes I was planning to overwinter it in a semi sheltered environment with frost cloth but it's just to know if I need to equally protect it or add a few layers extra around the rootstock.