Dates are one of the few fruits that were preserved before anyone invented preserving. Sugar content does most of the work. What actually degrades is texture, and that is entirely about moisture and temperature.
The three rules
Keep them cool, keep them dry, keep them out of sunlight. A cupboard away from the stove beats a decorative jar on the counter every time. Direct light dries the skin and dulls the colour within weeks.
Which ones need the fridge
High-moisture varieties must stay cold. Mazafati is the clear case: it should go in the fridge on arrival and it freezes well for up to a year. Ajwa and Kalmi benefit from refrigeration once opened during a Lahore summer. Mabroom and Zahidi are semi-dry and are perfectly happy in a cupboard.
| Variety | Store | Note |
|---|---|---|
| Ajwa | Cool and dry | Refrigerate after opening in summer |
| Amber | Cool and dry | Sugar may crystallise. Natural, not a fault |
| Mabroom | Cupboard | Serve at room temperature or it turns hard |
| Kalmi | Cool and dry | Refrigerate after opening in summer |
| Zahidi | Cupboard | The most forgiving of the six |
| Mazafati | Fridge at 4°C | Freezes well for up to a year |
White specks are not mould
Those white patches are naturally occurring sugar crystallising on the surface as the fruit loses moisture. It is more common in older stock and after temperature swings. Warm the dates gently and it goes back in.
Reviving a dried-out batch
Steam them for two or three minutes, or seal them in a container with a slice of apple overnight. Neither restores a badly neglected date, but both bring back a batch that has gone slightly firm.