How frost hardy is star ruby grapefruit compared to other citrus ? can it tolerate - 5 celzius for short period of time?

Hi Adriano !


Yes, it can, but it is near the limit.
Leafes and fruits could drop.

thanks. I did not decide jet where to plant those 3 citrus i bought in Wienna.
i have one place well protected from cold wind and 2 places among olives where citrus would be only partialy protected. I guess it is better to plant moro and taroco among olives.

Yes !

The blood oranges are much more hardy and the colour of the pulp will be most intensively, when get cold themperatures while riping.

The Grapefruit Star Ruby needs no coldness to develop their colour, for that colour is not anthocyan like the blood oranges, but lycopine.
That colour develops best at hot themperatures.
You see, that the Star Ruby will profit from the wall as well in summer heat as in winter.

Did you find also a place for the Lemon ?
I found out it is the sort CERZA, a seedling found in a little village of same name in Sicily.

I will keep lemon on the balcony for now, because i want to have some biger citrus in Zagreb too. So far i have meyer and Cerza on the balcony. I also planted the seeds you gave me, so i hope to have many seedlings by next summer.

yes, for sure !

My PrimoFiori seeds were planted same time and they grow now already ...