Guides
Freeze drying guides
The background behind the calculators and food pages, sorted in the order most owners need it: deciding on a machine, running it, storing what comes out, and using it. New to all of this? The Start here page puts the steps in order.
Choosing a machine
4 guidesWhether one pays off, which size, and how it compares with a dehydrator.
Harvest Right vs Blue Alpine vs Stay Fresh: Home Freeze Dryers ComparedPrices, tray space, batch size, power, weight and warranty for every home freeze dryer from Harvest Right, Blue Alpine and Stay Fresh, from the makers' own listings, with the real pros and cons of each brand.
Is a Home Freeze Dryer Worth It? The Math and the Trade-offsA home freeze dryer costs $1,300 to $5,000 before supplies. Here is how to work out whether it pays for itself, which kinds of owners come out ahead, and the costs that are not in the price.
Which Freeze Dryer Size Should You Buy? Countertop to X-LargeHow to choose between the Harvest Right Countertop 360, Small, Medium, Large and X-Large: what each holds per batch, what it plugs into, and how to size one to your harvest or your household.
Freeze Dryer vs Dehydrator: Which One Makes Sense for YouCost, texture, shelf life, nutrition, speed and which foods each handles best, with the break-even math on whether a $2,000+ freeze dryer is worth it over a $100 dehydrator.
Running batches
5 guidesWhat happens in the chamber, what to cook first, and how to keep the pump and the power bill in check.
How to Measure Your Freeze Dryer's Real Electricity UseHarvest Right's figures and our calculator give an estimate. A plug-in energy meter and one finished batch give your real number. Here is how to measure it, log it and compare.
What a Kitchen Scale Can and Cannot Tell You About a Freeze-Dried BatchA gram scale is the most useful tool next to a freeze dryer. Here is what weighing trays tells you about loading, yield, drying and packing, and the safety questions it cannot answer.
How a Home Freeze Dryer Works, Step by StepWhat happens inside the chamber during freezing, primary drying and final dry, why batches take 20 to 40 hours, and how to run a sensible first batch.
Freeze Dryer Vacuum Pump Oil: When to Filter, When to ChangeHow often to filter and change oil in a standard or Premier pump, how to tell oil is spent, what a slow vacuum means, and what oil really costs per batch.
What Not to Freeze-Dry at Home, and WhyThe foods extension services say to skip or cook first: raw meat, raw eggs, raw milk, raw dough, oils and pure fats, and high-sugar syrups. What goes wrong with each, and the safe alternative.
Storing what you make
2 guidesBags, oxygen absorbers and how long home batches really keep.
How Long Does Home Freeze-Dried Food Last? The 25-Year Claim, CheckedWhere the 25-year number comes from, why Utah State Extension recommends eating home freeze-dried food within 5 to 10 years, and what actually shortens shelf life.
Mylar Bags and Oxygen Absorbers for Freeze-Dried FoodWhich bag thickness to buy, how many cc of oxygen absorber each bag size needs, how to seal properly, and the packing mistakes that ruin a batch months later.
Using it
3 guidesAdding water back, trail meals and candy.
Freeze-Dried Candy at Home: Why It Puffs, What Works, and What to Check Before SellingHow freeze-dried candy puffs, which candies work and which don't, how to run and store a batch, and the cottage food rules and costs to check before you sell any.
How to Rehydrate Freeze-Dried Food: Methods, Timing and SafetySoak, mist, cook it in or eat it dry: which method suits fruit, vegetables, meat, eggs, dairy and full meals, how long each takes, and how to handle rehydrated food safely.
Making Your Own Freeze-Dried Backpacking MealsWhich home meals freeze-dry and rehydrate well on the trail, how to portion and pack them, how much water each needs, and the fat and safety limits to respect.