Produce Shelf Life & Cold-Chain Q10 Database

Pick the commodity and set the storage-temperature dial; the tool reads its base shelf life and Q10 from the database and applies life = base ÷ Q10^((T − optimum)/10). For example strawberries last about 7 days at their 0°C optimum but only around half a day at 20°C, while apples keep about 120 days at 0°C and roughly 40 days at 10°C. The decay curve steepens as temperature rises.

Q10 is how many times faster produce respires and deteriorates for every 10°C of warming. A Q10 of 3 means three times faster per 10°C, so shelf life is cut to a third. Most fruits and vegetables sit between Q10 2 and 3.5; the higher the Q10, the more punishing a warm store or a cold-chain break is.

Enter the breach temperature and how many hours it lasted. The tool compares the life consumed during the breach (at the warm-breach respiration rate) with normal storage, and reports the days of remaining shelf life lost. A six-hour breach to 22°C can cost a high-Q10 berry a meaningful slice of its few remaining days; the remaining-life bar shortens to show it.

Chilling injury is damage that cold-sensitive (mostly tropical and subtropical) produce suffers when stored below a threshold but above freezing — pitting, surface browning, failure to ripen, off-flavours and accelerated decay. Bananas (below ~13°C), mango (~10°C), tomato (~10°C), cucumber (~10°C) and many others are sensitive. The tool flags it with a red line and a critical verdict when your storage temperature is below the commodity's threshold.

For chilling-sensitive crops, cold below their threshold triggers physiological injury that no amount of later care reverses — a banana held at 4°C blackens and never ripens properly. So while cold extends life for hardy produce like apples and leafy greens, tropical produce has a floor below which damage sets in. The database carries each commodity's chilling threshold so you store at the right cold, not the coldest.

Each of the 60+ commodities lists its optimum storage temperature and relative humidity from USDA Handbook 66 and UC-Davis tables — for instance apples at 0°C / 92% RH, bananas at 13.5°C / 90%, onions at 0°C / 68%. Storing at the optimum gives the full base shelf life; the tool shows how many days you give up at any other temperature.

The optimum temperatures, relative humidities and chilling-injury thresholds are drawn from USDA Agriculture Handbook 66 (The Commercial Storage of Fruits, Vegetables, and Florist and Nursery Stocks) and the UC-Davis Postharvest Technology Center produce fact sheets. The base shelf-life and Q10 values are representative mid-range figures from the same postharvest literature.

The Q10 model captures the dominant effect — temperature on respiration and deterioration — and is the standard quick method for comparing storage scenarios. Real shelf life also depends on cultivar, maturity at harvest, handling damage, ethylene, packaging and humidity, so treat the days as a planning figure, not a guarantee. It is most reliable for ranking temperatures and quantifying a breach.

Set the storage temperature to your reefer or cold-room set point and read the shelf life and days lost versus optimum, then model a realistic breach (loading dock, transfer, power loss) to see its cost in days. Pick the highest temperature that still clears your distribution time, but never below a chilling-sensitive crop's threshold. Mixed loads should be set for the most chilling-sensitive item.

Yes — low humidity causes wilting and weight loss, especially in leafy greens and roots, which is why most produce wants 90–98% RH (onions and garlic are exceptions at 65–70%). This tool focuses on the temperature/Q10 driver of shelf life and lists each commodity's recommended RH so you can hold it; pair it with a VPD or weight-loss tool for the moisture side.

No. 4°C is excellent for apples, berries, leafy greens and most temperate produce, but it is below the chilling-injury threshold for bananas, mango, tomato, cucumber, eggplant, pepper and other tropicals, which should be kept warmer (8–13°C). The tool will turn red and warn you when your chosen temperature is too cold for the selected commodity.

Yes — slide the storage-temperature dial and watch the shelf-life figure, the days-lost-vs-optimum chip and the decay curve update live. Because the curve is the Q10 relationship, you can see exactly how much each degree buys or costs, which makes the trade-off between colder storage (longer life) and energy or chilling-injury limits obvious.