The UC Extension Services Website provides information about growing fruit and vegetables in California.
This website provides information that is specific to California to assist with:
More than 45 California counties have UC Cooperative Extension Master Gardener Programs with UC trained Master Gardener volunteers who are available to answer gardening questions for free. Go to the California Master Gardeners website and click "Find your local Master Gardener Program", then click your county's name to find your local help line phone number and email address.
More than 300 specialists and advisers at 64 County Cooperative Extension offices are great resources for local farming and gardening information.
This interactive map provides links to County Extension offices in every California county.
California is one of the top agricultural producers in the world. It's top food crops overall are Almonds, Grapes, Rice, Tomatoes, Wheat, Corn, Lettuce, Strawberries, and Walnuts. Leading crops in each category are:
Fruit and nut crops: Almonds, Apples, Apricots, Avocados, Blueberries, Cherries, Dates, Figs, Grapefruit, Grapes, Kiwifruit, Lemons, Melons, Nectarines, Olives, Oranges, Peaches, Pears, Pecans, Pistachios, Plums, Strawberries, Tangerines, and Walnuts.
Grain and staples: Barley, Dried Beans, Grain Corn, Peppermint, Oats, Potatoes, Sweet Potatoes, Rice, Sugar Beets, Sunflower, Safflower, and Wheat.
Vegetables: Artichokes, Asparagus, Snap Beans, Broccoli, Cabbage, Carrots, Cauliflower, Celery, Sweet Corn, Cucumbers, Garlic, Lettuce, Mushrooms, Onions, Peppers, Pumpkins, Spinach, Squash, and Tomatoes.
Below is a report of California agriculture statistics from the California Department of Agriculture website. It lists the major crops for each county on pages 13 and 14.
The below report from the California Department of Agriculture website contains detailed information about plant pests and diseases that are common in California and includes pictures:
These pages by "Find the Best" let you find average high and low temperatures for each month of the year and annual rainfall.
Enter a town, city, or zip code to see average temperatures for an area. Then click "See Details" next to a name to see a chart of average high and low temperatures for each month.
Enter a town ,city, or zip code to see average yearly rainfall for your area.
This interactive hardiness zone map by PlantMaps lets you zoom to an area or enter a zip code to show the average low temperature for each area of the state. This is helpful in determining which plants will survive in your area and which will do well. For example, citrus are grown in areas where temperatures don't fall much below 20 degrees F. Most apple varieties won't survive in zones 1 to 3 and won't do well in zones 8 and above because summers are too hot and they don't get enough hours of cold temperatures in the winter.
Enter a zip code in the search box at the top and click "Zoom to Zip". A box will pop up with information including the Average First Frost and Average Last Frost for this zip code. This is critical in most areas for determining planting dates.
This interactive heat zone map by PlantMaps lets you zoom to an area or enter a zipcode to see the number of days a year with temperatures over 86 degrees. This is useful for determining whether certain heat loving plants such as citrus will do well.
California includes these geographic areas. Click a link to go to pages with local gardening information for that area.