joe s wrote [in part]:

the main consideration for citrus trees is cross pollination....i have a few
desireable cross's other not so...

Actually, citrus needs no pollination at all, let alone cross
pollination. Unpollinated citrus flowers will not only produce
fruit, but (except for seedless varieties) the fruit will contain
viable seeds.

--
David E. Ross
Climate: California Mediterranean
Sunset Zone: 19 -- interior Santa Monica Mountains with some ocean
influence (USDA 10a)
Gardening pages at http://www.rossde.com/garden/