The origin of C35 was a seedling of Ruby orange x Webber-Fawcet trifoliate, made in 1951.  UCR released it in 1986.  Trees on C35 have relatively good freeze tolerance where the climate induces dormancy. As Kumin wrote, in climates with warmer winter temperatures, such as Florida and Texas, trees may be much less freeze tolerant. However, they are typically somewhat more susceptible than those on Trifoliate. Fruit also has relatively good freeze tolerance.  C35 has good compatibility with all oranges, grapefruit, and Lisbon lemons, but strong incompatible with Eureka lemon. Nearly all mandarins perform well for at least 10 to 15 years, but many eventually develop bud union crease and decline.  Lastly, C35 is well adapted to loam, sandy loam and sandy soil,  May perform poorly on very heavy soils with poor drainage  Poor tolerance to soils having high chloride and also calcareous soils, where it is somewhat worse than Carrizo

C-35 hardineness is contingent upon it's state of dormancy. It's hardiness is best under steady cold conditions.

Just wondering if it prefers more infertile soil to get it to fruit. Ours grow naturally on quite poor soil.

I still have hope growing mangoes successfully in Southern California. I can’t confirm because I planted most of my mangoes last September but trees like the one below can be seen in many backyards of garden grove area in this time of year. Full of mangoes with new growth, picture taken yesterday.

I think the quats are low on the priority list as far as crosses. People seem to want to experiment with the "new" stuff that is around now. The lowly quat has been passed by. Shame as the little sweet meiwa is a taste treat, cold hardy, easy to grow and easy to propagate. Is it because they are small? Does small mean insignificant?

Too bad, I like the quats. My best marmalade was made with the Calamondine orange, which I think is a quat.