Courgette is the honest test of a freezing line. It is around ninety-five per cent water with a soft cell structure and almost no starch to hold it together, which means every shortcut taken in the freezing tunnel is visible on the plate. A well-frozen slice holds a recognisable shape and a firm bite after cooking. A badly frozen one turns to a grey, watery collapse, and nothing downstream can recover it.
Ukrainian production is concentrated in the southern and central oblasts on irrigated ground, harvested continuously through the summer at a small calibre because an overgrown courgette is mostly seed cavity. The processing lines run alongside the fresh trade, taking the calibres that are wrong for retail fresh but perfect for slicing.
Grades, cuts and calibration
Cut format. Rounds at 8 to 12 mm are the volume format for ratatouille and vegetable mixes. Half-moons suit a larger courgette. Dice at 10 to 20 mm goes into soups and ready meals. Batons and grill-cut slices are a food service format, sometimes supplied pre-grilled with the char marks applied before freezing.
Raw material calibre. A small, immature courgette has a dense flesh, a negligible seed cavity and dark skin, and it freezes far better than a large one. Specify a maximum raw diameter, because the temptation to run oversize fruit through the line is strong and the result is a slice with a hollow, seedy centre that falls apart.
Drip loss. On this product IQF performance and drip loss are the same conversation. A slow freeze forms large ice crystals, the crystals puncture the cell walls, and the water leaves on thawing. Contract a drip loss ceiling on a stated protocol and test it, because it is the only number that distinguishes a good line from a cheap one.
Colour and skin. Dark green skin with pale flesh, no yellowing and no water-soaked translucency. Translucent edges on the frozen slice mean the product has already thawed once.
Seasonality and availability
Courgette is picked continuously from June to September, every two or three days per field, because the fruit grows quickly and the window between the right size and too big is short. That gives the freezing lines a long, steady summer campaign rather than a compressed peak.
Mid-season material, from July into August, is generally the best: the plants are in full production, the calibre is consistent and the flesh is firm. Very early and very late fruit is more variable and the late crop can carry more surface blemish.
Supply outside the season is from frozen store on the declared crop year. Because the raw material is cheap and the finished product is bulky, processors do not build large speculative stocks, so late-season buying is a planning question.
What the buyer checks at intake
- Identity and lot: crop year, cut format, nominal thickness and the establishment approval number.
- Core temperature with the logger download.
- Slice thickness and uniformity on a measured sample against the contracted nominal.
- Free-flow condition. Slices frozen wet or frozen slowly will be stuck together in sheets, which on this product is the clearest possible signal.
- Drip loss after a controlled thaw on the contracted protocol. This is the acceptance test.
- Cooked texture and appearance. Simmer or pan a sample and see whether it is still a slice.
- Colour, skin condition and translucency, plus the certificate of analysis against the residue and microbiological specification.
Where it is used
Ready meals and prepared foods take slices and dice into ratatouille, Mediterranean vegetable mixes, pasta sauces and vegetarian ranges. This is the volume outlet and it is also the least forgiving, because the courgette has to survive both the manufacturer’s cook and the consumer’s reheat.
Food service takes bulk slices and grill-cut formats for canteens, pizza toppings and buffet lines, where pre-grilled material saves a labour-intensive step. Retail private label takes bagged mixes rather than straight courgette, because few consumers buy frozen courgette on its own.
Soup and sauce manufacture takes dice and the smaller off-cuts, where structural collapse is irrelevant because the product is blended anyway. That outlet is what lets a slicing line sell its geometry rejects.
Standards and routes
Reefer road at minus 18 degrees Celsius or colder. Courgette is light for its volume, so a trailer will cube out at around 18 to 20 tonnes rather than weigh out.
This is the frozen vegetable least tolerant of a temperature excursion. A few hours of partial thaw produces sheets of fused slices, visible ice in the liner and a drip loss figure that will fail the specification, and none of it is recoverable. Continuous monitoring and a short, direct route are worth more here than on any other line in the range.
Documentation is the standard third-country set. Where the destination is warm or the leg is long, a reefer container with a verified pre-cool beats a road trailer with a marginal unit.