Anna is a Golden Delicious-style apple, developed in Israel specifically for cultivation in "low-chill" areas where winter temperatures rarely drop to freezing. 
Anna has an exceptionally low chill requirement, and will thrive even in climates where temperatures dip towards freezing for only 250 hours or so each winter.  This makes it ideally suited to climates such as southern California and southern Texas which are in USDA zones 8-10.
Anna is a very early-season apple, ripening in late June / early July.  As a precocious, semi dwarf variety, the Anna apple tree will bloom early and produce a copious crop.
Ein Shemer and Dorsett Golden are perfect pollinators for the Anna Apple tree.