Citrus varieties for espalier on South-facing, hot wall?
I live in Southern CA (Corona in the I.E. to be exact) and have a south-facing spot against the house that I'd like to place two basic, horizontal citrus espaliers; it can get really hot in this spot.
What would be some tasty citrus varieties you'd peel and eat (not lemons, limes)? I've heard grapefruit would do well in this heat, but I'm not personally wild about the flavor of your traditional ones. I wanted to do a Gold Nugget and Kishu mandarin, but I heard mandarins wouldn't be well suited for this intense heat and would do better positioned elsewhere.
Would navels do well? Are there any great tasting suggestions you have that would meet this criteria?
Thanks for your help!