The Tropical Fruit Forum

I can only say that Yuzu was more hardy than Poncirus the last year. Poncirus lost all of its previous growth and had some bark cracks because of late frost. Yuzu only lost its leaves and had no twig dieback at all. The reason will be that Yuzu has a deeper dormancy or needs higher temperature for sapflow.

That is not my own experience but I have read that citrus grafted on Poncirus is not necessarily hardier than on citrus rootstocks because Poncirus induces early growth in spring so that the grafts are sometimes even less hardy than on other rootstocks. For me, that is plausible and fits my observation that Poncirus needs not much warmth in spring in order to grow. I am not sure, however, if we can conclude that trifoliate hybrids are sometimes hardier on their own roots. Real experience shall decide the case, experience that I don't have.

What the lower temperature did you notice? I think you have some right but if it was -12deg it is not much for Yuzu.
I have the same problem in spring with P.Trifoliata. Even when is -3/-5 deg in spring in April / May I can lost about 1/3 or more twigs due to bark crack.

Thank you for photo 😯 Ilya.

I have from you it means propably from A. Voss.

I am looking for fruits or seeds of N1triVoss. I could send fruits or seeds Ichang papeda klon Klock or Hana yuzu (Eisenhut).