Storage advice is easiest to follow one crop at a time, because the steps that matter for a potato are nearly the opposite of those for an onion. The pattern across all of them is the same, though: harvest at the right maturity, do any curing the crop needs, then hold it at the conditions it tolerates. What follows works through the vegetables a typical cold-climate Canadian garden produces in quantity.
Potatoes
Lift potatoes once the vines have died back, and handle them gently — bruises become rot. Cure them for one to two weeks at around 10–15°C in the dark with some humidity, which thickens the skins and heals minor nicks. Then move them to cold, dark storage near 4–7°C. Two rules stand out: never let light reach them, because light produces the green, bitter solanine layer; and keep them away from apples, whose ethylene wakes the eyes early.
Carrots, beets and other roots
Roots store remarkably well because they want exactly what a cellar provides: just above freezing and very humid. Twist or cut off the green tops close to the crown so the leaves do not pull moisture from the root. Leave the roots unwashed — the film of soil protects them — and pack them in barely damp sand, sawdust, or peat. The packing medium holds the 90–95% humidity they need so they stay firm rather than rubbery.
Damp, not wet
The sand around roots should feel like a wrung-out sponge. Genuinely wet packing invites rot; bone-dry packing lets the roots shrivel. The narrow band in between is what keeps carrots crisp into spring.
Winter squash and pumpkins
Hard squash is the exception that confuses people, because it wants to be warmer and drier than everything else. Leave a few centimetres of stem attached, cure the fruit at warm room temperature for a week or two to harden the rind, then store on open shelves at around 10–15°C. A cold, damp cellar will actually shorten a squash's life. Acorn squash is the short keeper of the family; butternut and hubbard types can hold for months.
Onions and garlic
Alliums are all about dryness. Pull them when the tops have flopped and begun to brown, then cure them somewhere warm, dry and airy until the necks are papery and the outer skins rustle. Only then should they go into storage — cool, dry, and with airflow, in mesh bags or braided rather than piled in a sealed box. Any onion with a thick, green, unsealed neck will not keep and should be eaten first.
| Crop | Cure | Store at |
|---|---|---|
| Potatoes | 1–2 weeks, 10–15°C, dark | 4–7°C, dark, humid |
| Carrots, beets | None | 0–2°C, 90–95% in damp sand |
| Winter squash | 1–2 weeks, warm room | 10–15°C, dry, airy |
| Onions, garlic | Until necks are papery | 0–5°C, 60–70%, airflow |
| Cabbage | None | 0°C, 90–95%, separated |
Cabbage and other brassicas
Late, dense cabbage stores for months at near-freezing temperatures with high humidity. The catch is the smell: cabbage gives off a strong odour in a closed cellar, and it can taint nearby crops, so many gardeners store it apart — in a separate bin, an unheated shed, or wrapped individually. Brussels sprouts and kale handle cold in the garden well into the freezing weeks and are often left standing and picked as needed rather than stored.
What to do with the rest
Not everything keeps fresh. Beans, peas, corn, tomatoes and most fruit are better frozen, dried, fermented or canned. For any canning, especially of low-acid vegetables, follow tested recipes from a recognised food-safety source rather than adapting one yourself; the risk with home-canned low-acid foods is serious and worth taking seriously.