Dehydrating Food at Home in Canada

Pulls moisture out of food until microbes can no longer grow. Herbs, fruit leather, dried fruit, jerky, and vegetable powders — all shelf-stable for months.

How it works

You can dehydrate in a dedicated machine, in a low oven, or for some foods, by air-drying. Each method has its own temperature and time targets.

When to use this method

Best for: herbs (parsley, basil, thyme), fruit leather, apple rings, banana chips, jerky (meat, see safety notes), tomato powder, mushrooms, and vegetable chips.

Authority sources

How dehydrating preserves food

Microbes need water to grow. Dehydrating reduces water content below the threshold most bacteria, yeasts, and moulds can survive — typically below 20% water content for fruit and below 10% for vegetables.

The food becomes shelf-stable without refrigeration. Most dehydrated foods keep their quality for 6–12 months in airtight containers at room temperature; vacuum-sealed they go 1–2 years.

The trade-off versus canning: dehydration changes texture (apples become chewy, herbs become brittle) and concentrates flavour. The trade-off versus freezing: dehydrated food doesn't need a power-dependent storage system.

Equipment: dehydrator vs oven vs air

A dedicated electric dehydrator is the most reliable. It maintains low temperatures (35–70 °C / 95–160 °F) with constant airflow. Stackable-tray models (Excalibur, Nesco) cost CAD $80–250 in Canada; horizontal-airflow units are more even but pricier. See our Canadian dehydrator buying guide and how to clean and maintain it.
A low oven works if it goes below 90 °C (200 °F). Many ovens won't go that low, and the bigger problem is airflow — without it, the food steams instead of drying. Prop the oven door open a few centimetres. Full method in our guide to dehydrating without a dehydrator.
Air-drying works for hard herbs (rosemary, thyme, sage, oregano) in a dry, ventilated spot. Tie stems in small bundles, hang upside-down in a paper bag, wait 1–2 weeks.
A sun dryer or solar dehydrator is rarely practical in Canada — our summer humidity is too high in most regions for reliable sun-drying. Better to invest in an electric dehydrator.

Comparing gear across methods? See our Canadian preserving equipment guides.

Temperature ranges by food

These are the widely-published ranges for home dehydrators. The exact setting depends on your machine — check its manual.

Herbs: 35–40 °C / 95–105 °F. Low and slow preserves the volatile oils that carry flavour. Higher temperatures burn off the very compounds you're trying to keep.
Vegetables: 50–55 °C / 125–135 °F. Higher than herbs, lower than fruit. Most vegetables need 6–14 hours.
Fruit and fruit leather: 55–65 °C / 135–150 °F. Higher temperature for higher sugar content. Most fruit needs 6–24 hours.
Jerky (meat): 65–70 °C / 150–160 °F. Then verify with an oven step: Health Canada recommends an additional 10 minutes at 75 °C (165 °F) in the oven after dehydration to ensure pathogen safety. This is the most common safety oversight in home jerky.

How long to dehydrate: the full times & temperatures chart

Drying time runs from about an hour for tender herbs to eighteen hours for whole blueberries, and the right temperature climbs with sugar and fat content — herbs lowest, then vegetables, then fruit, then jerky. But these are a quality guide, not a safety-critical figure the way canning times are: whatever the clock says, the dryness test is the source of truth. If a piece is sticky, moist, or cool to the touch when you pull it, it isn't done — add another hour and re-test.

Rather than duplicate the numbers here, we keep the full lookup in one canonical place: our chart of what you can dehydrate — the prep, temperature, and drying time for every food, plus the short list of high-fat foods you should never dry.

How to dehydrate without a dehydrator

You don't need to buy a machine to start. The two practical no-dehydrator methods are oven drying — set the oven as low as it goes (ideally at or below 90 °C / 200 °F), prop the door open a few centimetres so moisture escapes instead of steaming the food, and dry on wire racks rather than solid pans — and air drying, which works well only for hardy herbs and thin-walled hot peppers hung in a dry, ventilated spot. There's also a niche summer car-window trick.

Oven drying runs roughly 30–50% longer than a dehydrator because airflow is weaker, and delicate herbs, whole blueberries, and thick wet vegetables all do poorly without one. For the full step-by-step of each method — oven, air, and car-window, with what works and what doesn't in each, and the vegetable-specific blanch-first routine — see our guide to dehydrating food without a dehydrator. If you find yourself doing more than a couple of oven batches a month, an entry-level dehydrator pays for itself in a season — see the Canadian dehydrator buying guide.

The dehydrating process at a high level

Choose ripe, unbruised produce. Damaged spots can carry mould that the dehydrator's low temperature won't kill.
Wash and pat dry.
Pre-treat as needed. Apple slices, banana, pear: brush with lemon-water (60 mL bottled lemon juice in 1 L water) to prevent browning. Blanch most vegetables for 2–3 minutes first (same as for freezing — deactivates enzymes).
Slice uniformly. 5 mm slices dry faster and more evenly than 10 mm. Inconsistent slice thickness means some pieces are done while others are still wet — and the wet ones spoil the batch in storage.
Single layer on trays. No overlap. Airflow needs to reach every piece.
Set the temperature, set the timer, walk away. Check at the halfway point and rotate trays if your unit dries unevenly.
Test for dryness. See the next section — this is the key safety check.
Cool, then condition. Let the dried food cool to room temperature, then "condition" in a sealed jar for a week: shake daily, watch for condensation on the jar walls. If you see moisture, the food wasn't dry enough — dehydrate further before long-term storage.
Store. Airtight containers (glass jars with tight lids or vacuum-seal bags), away from light, in a cool dry place.

How to test for dryness

Fruit: pliable like leather, no moisture when squeezed and torn in half. Apple rings bend without breaking; if they snap they're over-dry (still safe, just brittle).
Vegetables: hard or crisp, depending on the vegetable. Beans and corn rattle. Zucchini chips snap.
Herbs: crumble between your fingers. Stems should snap, not bend.
Jerky: bends and cracks but does not break. No visible moisture beads when you squeeze it.

If the food is sticky, moist, or feels cool to the touch (residual evaporation), it needs more time. "Almost dry" food spoils in storage; "slightly over-dry" is harmless.

Storing dehydrated food and how long it keeps

Drying is only half the job — how you store the food decides whether it lasts months or spoils in weeks. Two steps do most of the work: conditioning, then airtight, dark, cool storage.

Condition first

Even a batch that passed the dryness test can hold pockets of uneven moisture. Conditioning evens them out. Pack the cooled food loosely into a clear glass jar, seal it, and leave it on the counter for about a week — shaking daily so pieces don't clump. If you ever see condensation fog the glass, the moisture wasn't fully gone: return the food to the dehydrator for another hour or two, then condition again. Only move to long-term storage once a week passes with no fogging.

Containers and location

Airtight is non-negotiable. Glass jars with tight lids, or vacuum-seal bags. Every time humid air reaches dried food, shelf life drops.
Dark and cool. Light fades colour and degrades vitamins; heat speeds spoilage. A pantry or cupboard beats a sunny shelf, and a basement or root cellar is better still.
Small jars over one big one. Opening a jar re-exposes everything inside to air. Portion into jars you'll finish within a week or two of opening.
Add a food-grade oxygen absorber to long-term jars — it slows oxidation and helps deter pantry moths.
Label with the date. Dried food doesn't announce its age the way a bulging can does.

Roughly how long it keeps

These are commonly-cited room-temperature ranges for properly dried, airtight-stored food. Cooler storage and vacuum-sealing push them longer; a warm, humid, or frequently-opened jar shortens them.

Dried herbs: 1–3 years. Flavour fades well before they're unsafe, so replace annually for the best taste.
Dried fruit and fruit leather: 6–12 months at room temperature; up to 1–2 years vacuum-sealed or frozen.
Dried vegetables: 6–12 months. Vegetable powders keep longest of all if you store them bone-dry and clump-free.
Jerky: the shortest-lived, because its fat eventually goes rancid. Keep it refrigerated or frozen for anything beyond a few weeks — see the safety steps in our beef jerky guide.

When in doubt, freeze — dehydrated food takes little freezer space and the cold buys months. And trust your senses on the way out of the jar: any off smell, visible mould, or sponginess means compost it, don't taste it. Our guide on telling if preserved food has gone bad covers what to watch for.

Common failures

Mould in the storage jar. The food wasn't dry enough. Condition for a week before sealing long-term and watch for condensation.
Case hardening (hard shell, soft middle). Caused by too-high temperature too early. Start at the bottom of the temperature range and work up if needed.
Browning of light fruit. Apples, pears, bananas oxidize. Lemon-juice pre-treat solves this.
Loss of flavour in herbs. Temperature too high or drying too long. Herbs should be just-dry-enough-to-crumble; over-drying volatilizes the oils.
Jerky safety question. The 75 °C / 165 °F post-dehydration oven step is non-negotiable for safety, even if some US blogs skip it. Health Canada and Bernardin both call for it.

For more of the mistakes that trip up new dehydrators, see our common dehydrating mistakes guide.

What's best for dehydrating

Herbs (parsley, basil, oregano, thyme, sage, rosemary, mint) — fastest, easiest, biggest flavour reward versus store-bought. The gateway dehydrating project.
Apple chips — rings or slices from McIntosh, Cortland, Empire, or mixed windfalls. The fall-staple project.
Dried tomatoes — Roma or San Marzano halves, dehydrated to leather. Note the oil-pack safety rule for storage. Grind the misfits into tomato powder.
Fruit leather — purée fruit, spread on a non-stick tray liner, dry until pliable.
Jerky — beef or bison and venison. Requires the Health Canada post-dehydration oven step at 75 °C.
Mushrooms — slice 3–5 mm; dry until brittle. Reconstitute in hot water for soup, or grind into mushroom powder.
Vegetable chips — kale, zucchini, and sweet potato.
Fruit for snacking — banana chips and blueberries for granola, oatmeal, and trail mix.

Every guide in this method

Sources

Bernardin — Drying / dehydration guidance
Health Canada — Food safety for home preservation (including jerky safety)