Nice to know you are in northern California. Because of the size of the area and the many micro climates it would help to know your approximate location. Al

I live in the Chico/paradise area...you are correct, very good question !

My son lives in the Paradise area. He has practically no sun. For citrus you will need full sun AND protection from hard frost. If you seed annuals or perennials at this time they won't germinate until the ground warms, if the birds have not eaten the seed by then. Why not start your seed inside now and plant out when it warms up? Select plants to match your amount of sun or shade. Al

One way to find out which varieties do well in your area is to find a couple of neighbors who are into citrus and ask what types they grow. Every town has a few enthusiasts who will be full of information. You will recognize their gardens, which will be obviously well maintained and will probably have several different types of fruit trees that seem to have nice fruit. You could ask those gardeners which types of citrus grow will in your town.