The range of fresh food available in a given place is set less by what can be grown than by what can be moved cold. The refrigerated chain is the binding constraint.
Temperature control begins at harvest
Most produce continues respiring after picking, consuming its own sugars and generating heat, which accelerates deterioration.
Removing that field heat quickly, through cooling at or near the point of harvest, extends usable life more than any later step can.
Produce that is not cooled promptly cannot be rescued downstream, which is why the first hours determine what the rest of the chain has to work with.
Different foods need different conditions
Optimal storage temperature and humidity vary widely between crops, and several tropical fruits are damaged by cold storage rather than preserved by it.
Certain fruits release ethylene, which accelerates ripening in anything stored alongside them, so compatibility governs what can share a container.
A chain designed for one product mix therefore cannot simply be repurposed, which limits how easily infrastructure spreads to new crops.
The weakest link sets the outcome
A consignment held correctly for almost its entire journey can still be lost during a short unrefrigerated wait on a loading dock or at a transfer point between vehicles.
Deterioration is cumulative and cannot be reversed by returning the product to the correct temperature afterwards, so an hour of exposure is subtracted permanently from shelf life.
Data loggers travelling with the load exist precisely to identify where a break occurred, since the resulting damage frequently becomes visible only days later at the retail end.
Infrastructure gaps produce loss
Where cold storage near production is limited, growers must sell quickly regardless of price, which weakens their position and concentrates supply into short windows.
A substantial share of horticultural output is lost between harvest and market in regions where the chain is incomplete.
Investment tends to concentrate on the high-value end, so export crops receive proper handling while staple produce for domestic markets does not.
The chain shapes what is grown
Varieties are selected for how well they survive transport as much as for flavour, since a fragile variety cannot reach a distant market intact.
This is why produce bred for shipping durability dominates supermarket shelves while more delicate varieties remain local.
Improvements in the chain change what is commercially viable to plant, which is why regional specialisation shifts as refrigerated capacity expands.