Pomona’s citrus history is easy to picture as rows of orange trees beneath the mountains. The industry’s wider story includes water systems, skilled work, packing facilities, transportation, advertising, and the decisions that eventually transformed agricultural land. Looking beyond the orange groves reveals how a crop helped organize an entire regional economy.
An old fruit label or photograph can begin that investigation. Each represents one part of a larger process. Following the fruit from a tree to a distant customer brings more people and places into view, including many who rarely appeared in the polished image of California sunshine.
How citrus entered the valley’s changing landscape
Cal Poly Pomona’s guide to the citrus industry and the 1880s boom describes groves in the region from the nineteenth century and the importance of navel oranges to later expansion. It also notes that other crops, including alfalfa, barley, and beets, belonged to the agricultural economy. Citrus grew within an already worked and changing landscape.
The city’s identity developed alongside that process. The university’s Pomona history guide connects the city’s name to an 1875 competition and the Roman goddess associated with fruit. The choice offered an appealing image for a developing community. Its later association with citrus made the name particularly memorable.
For the wider sequence of settlement, transportation, and city growth, see the history of Pomona, California. Keeping that chronology in mind helps avoid treating the citrus era as a timeless landscape.
A successful grove required a working system
A grove needed sustained care between harvests. Think about the practical tasks behind a photograph of orderly trees: maintaining water delivery, tending the soil, monitoring plant health, and moving equipment through rows. These activities make useful research subjects because they connect an attractive landscape with the resources and labor that kept it productive.
Try choosing one object to follow through this working system. A wooden fruit box, for example, can prompt questions about materials, packing, transport, ownership, and sale. This approach gives a citrus-history project a clear thread without reducing the industry to a single company or famous grower. Record which stages your sources illuminate and which still need investigation.
Water made the landscape possible
Water deserves a place beside fruit in any account of Southern California agriculture. California State Parks’ Citrus State Historic Park visitor guide describes a landscape influenced by irrigation and a reservoir. The park is in Riverside, so it provides regional context rather than proof of the system used on a particular Pomona property.
For a local grove, ask where water originated, how it reached the trees, and who maintained the delivery system. An irrigation channel, pipeline, reservoir, or company name on a map can suggest the next record to examine. Ownership of land and access to water should be investigated together.
Follow a parcel across different records
A parcel map might identify boundaries without explaining agricultural use. A photograph may show trees without establishing ownership. A newspaper item might mention a grower but omit the exact location. Bringing those records together can narrow uncertainty and prevent a familiar surname from being attached to the wrong grove.
Keep the observation separate from the conclusion
If a dated aerial image shows rows of trees, record that visible pattern first. Identifying the crop, the planting date, or the people who worked there requires additional evidence. This simple habit is especially helpful when comparing photographs made decades apart.
The workers behind the harvest
The labor involved extended from groves into packing and transportation. California State Parks’ citrus history education program emphasizes migrant and immigrant workers and the racial and class divisions that shaped many Southern California communities. That regional context encourages a broader account than a list of growers and acreage.
For Pomona, the next step is to find local evidence. City directories, census records, oral histories, employment records, and family collections may reveal occupations, addresses, and relationships. They can help identify the people connected to a particular operation without assuming that every regional labor pattern applied identically in the city.
Pay attention to the work itself. Harvesting and packing required judgment about handling perishable fruit. A photograph of a packing room can raise questions about the arrangement of equipment, division of tasks, and movement of boxes. Whenever possible, pair that visual record with an account from someone who performed the work.
Packing, shipping, and selling the fruit
A crop became commercially valuable through a chain of activities beyond the grove. Fruit had to be selected, handled, packed, and transported to buyers. The Sunkist cooperative’s own history, which traces its origins to 1893, provides one entry point into the organization of growers and packinghouses. A local history can then investigate which associations or companies operated in the Pomona area.
Rail connections also changed the region’s opportunities. Rather than treating a railway line as background scenery, consider its relationship to agricultural land and packing facilities. Distances between those places help explain why location mattered. Freight records and maps can offer firmer answers than a generalized story about growth.
What a citrus label reveals
The Pomona Public Library’s Citrus Label Collection brings together thousands of crate labels from California and other West Coast growers. These designs are useful records of branding: names, colors, landscapes, and figures selected to make fruit recognizable and desirable.
Read a label as advertising. Which place does it name? Does it identify a grower, packer, or distributor? What impression of California does it create? An idyllic picture can tell us about a sales message without showing an actual grove or the conditions under which its fruit was produced.
When groves gave way to new uses
Cal Poly Pomona’s city guide describes the conversion of many groves to development after World War II. That broad transition did not happen at the same pace on every property. Tracing one location through maps, photographs, and planning records can reveal a more precise sequence of cultivation, sale, construction, and later alteration.
The library’s Pomona Images collection offers material for examining the city’s changing appearance. Pair an image with its catalog information before using it as evidence. A date supplied approximately should remain approximate in your own account.
Recognizing the citrus legacy today
Citrus history can remain visible through records, street patterns, place names, surviving buildings, and family memories. A name alone does not prove that a particular property once held a grove, but it can provide a productive question. The aim is to connect a clue with evidence.
Try the methods in How to Research a Pomona Street, then use Pomona, Then & Now to compare what changed. The citrus landscape becomes more informative when its beauty, labor, infrastructure, and later transformation are considered together.
Image note: All three images are AI-generated illustrations, not archival photographs or verified views of specific Pomona sites.