Spring is the Time for Potatoes, Asparagus and Citrus
Now is the time to consider planting edibles like potatoes, asparagus, and citrus.
Asparagus is a very hardy perennial plant and a member of the lily family (Asparagus officinalis). Our Master Gardeners give advice on how to enjoy "Asparagus: Spears for Years" here. Asparagus is unique in the world of edible crops because it's perennial, providing 15+ years of tasty spears after a single planting. Although easy to grow, you must prepare the soil, pick a site with full or partial sun and to avoid crowding out by other plants a raised bed works well. Also, you must be patient since the best approach is to harvest your spears after a year or more of growth, so the plant leafs out to establish a healthy crown and provides a vigorous crop for years to come. All this work and patience will give you many years of spears.
Also consider citrus, which are native to Asia and a member of the Rutaceae family and ideally suited to the California garden. Anne-Marie Walker says citrus is evergreen, prolific, and low maintenance, and the best time to plant citrus is in spring. They are good candidates for 5-gallon or bigger containers. They like six hours of sun, and some heat to develop sugar. A bountiful harvest of citrus allows you to make juice, jams and jellies, and a counter display of fruit brings sunshine into your kitchen.