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🥔 Root Cellars & Food Storage Without Power

How to keep a year's harvest with no refrigerator: root cellars, storage rooms, pits and buried barrels, cooling with water and evaporation, sun and solar drying, curing and smoking meat, fermenting, and keeping eggs. The manuals are in Food-Storage\ (Root-Cellars-Pits, Cooling-Without-Power, Drying, Curing-Smoking, Fermenting-Eggs-Vinegar); canning and freezing are in Gardening-Food\.

⚠️ Rules that prevent food poisoning and losses

• Low-acid food in sealed jars needs pressure canning — never "water bath" or "oven can" vegetables, meat or beans, and never can wild mushrooms. Follow the USDA canning guide exactly.
• Cured meat needs exact amounts. Weigh salt and any curing salt (nitrite/saltpeter) — too little lets meat spoil, too much nitrite is poisonous. Follow one tested recipe; don't mix them.
• Cold-smoked fish is not cooked. Hot-smoke fish to 150–160 °F inside for 30 minutes (PNW 238) unless it's heavily salted and dried.
• Green potatoes are toxic (why) — store potatoes in the dark and cut away green parts.
• Check stored food weekly. One rotting apple or potato spreads; remove it at once.

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🌡️ The Illinois Valley problem: warm ground

Old root-cellar books assume cold ground. Deep soil stays near the average yearly air temperature, and across most of the U.S. that's 49–58 °F; at 6 ft down clay still swings about ±11 °F through the year (MSU Earth Tempering, p. 2; ground-temperature map and chart). Here the yearly average is roughly 54 °F (rule of thumb, from Cave Junction's average highs and lows). So:

• A cellar here idles around 50–58 °F. That's perfect for winter squash, pumpkins, sweet potatoes, and fine for a few weeks of most other crops.
• To get it down to the 32–40 °F that potatoes, carrots, cabbage and apples want, you must cool it with cold night air in winter: open the vents on cold nights, close them on warm days (USDA FB 1939 (1960), p. 5; Agriculture Canada Pub. 1478, p. 12; where the cold air comes in). November–February nights here regularly fall into the 20s and 30s.
• In a 50–60 °F space, root crops keep only 3–4 weeks; packing them in damp (not wet) sand or soil cuts the shriveling, and a partitioned-off room or outdoor cellar let in to outside air about doubles the time (USDA FB 1939 (1943), pp. 29–30).
• Mild winters are also an advantage: many crops can simply stay in the garden all winter (see below), so you need less cellar than people in cold country.

📚 Go deeper: USDA FB 1939 (1943) — storage in a 50–60 °F space, p. 29; MSU Earth Tempering — ground temperature map, p. 2; PNW 548 — winter vegetables west of the Cascades.

🧺 What each crop needs

Four groups — store each group together (USDA FB 1939 (1943), p. 19; storage life from Agriculture Canada Pub. 1478, pp. 13–15):

Group	Crops	Ideal	Keeps (at ideal)
Cold & moist	Potatoes (39 °F) · carrots, beets, turnips, rutabagas, parsnips, cabbage (32–34 °F) · apples, pears (30–32 °F)	85–95% humidity	potatoes 4–9 mo · carrots 4–5 · beets 1–3 · cabbage 3–4 · rutabaga ~6 · apples by variety
Cold & dry	Onions, garlic (32 °F) · dry beans, grain	50–70% humidity, airy	onions 5–9 mo · garlic 6–8 · dry beans years
Cool & fairly dry	Winter squash, pumpkins	50–55 °F, 50–70%	squash ~6 mo · pumpkins 2–3
Warm-ish	Sweet potatoes	55–60 °F, 75–85%	many months

• Potatoes: first cure 1–2 weeks at 59–68 °F in high humidity so skins toughen and cuts heal. Below about 38 °F they turn sweet; above 40 °F they sprout sooner; they freeze near 30 °F. Keep them dark. (USDA Ag Handbook 66, p. 517)
• Winter squash and pumpkins: cure about 2 weeks at 80–85 °F (a sunny porch in October), then store at 50–55 °F — colder than 50 °F damages them. (USDA FB 1939 (1943), p. 30; AH 66, p. 525)
• Sweet potatoes: cure about 10 days at 85 °F and high humidity (USDA FB 1442), then store at 55–60 °F — below about 55 °F they suffer chilling injury and decay (FB 1442's older 50–55 °F is too cold) (AH 66, p. 577; FB 1939 (1943), p. 30).
• Garlic: keeps 1–2 months at room temperature, 9+ months near freezing (AH 66, p. 343).
• Nuts: dry hazelnuts to a crisp kernel; they keep about 2 years below 50 °F (AH 66, p. 761).

Keep apples and pears away from vegetables. They give off ethylene gas, which makes potatoes sprout and carrots bitter; onion and potato smells taint apples (Canada Pub. 1260, p. 16; Pub. 1478, p. 4).

📚 Go deeper: Agriculture Canada Pub. 1478 — crop tables, pp. 13–16; USDA Ag Handbook 66 — every crop, in detail; WSU Storing Vegetables and Fruits at Home.

🏗️ Building a root cellar

The essentials (Canada A Practical Farm Root Cellar, pp. 2–6; Novia Handbook for Building a Root Cellar; plan of a 10×14 ft farm cellar):

1. Drainage first. Pick a slope or high ground. On the wet valley floor, build at or above ground level and heap earth over it rather than digging into a winter water table; lay a drain pipe along the footings (Novia, pp. 8–9; plan and section drawings).
2. Earth cover: at least 3½ ft of soil and straw over the roof (layers of ~6 in straw and 8–12 in soil), carried well past the sides. Add soil as the straw rots.
3. Two vents at opposite ends, about 12 in square for a 10×14 ft cellar (how the air flows through; vents in a cellar cross-section):
   • Intake: brings outside air down to about 1½ ft above the floor.
   • Outlet: starts at the ceiling and rises well above the roof (warm air leaves high).
   • Both adjustable, and screened against rodents and insects.
4. Double doors about 4 ft apart act as an air lock. Face the door north and keep it shaded so summer sun doesn't heat it (Novia, pp. 13–14).
5. Floor of earth or gravel — it holds moisture. Shelves of slats 4 in off the floor and walls so air moves around everything.
6. A thermometer and a humidity gauge inside (or a wet rag test: if things shrivel, it's too dry — sprinkle the floor).

Night venting: open both vents on cold nights so cold air pours in low and warm air leaves high; close them on warm days (a diagram drawn for this guide).

The same idea in a USDA plan: air comes in under the slat floor and leaves through the ventilator at the top (USDA FB 1939 (1943), p. 14).

Simpler options:

• Basement-corner storage room: about 10×10 ft with an outside window. Insulate the two inside walls and the ceiling (vapor barrier on the warm side), and run an intake duct from the window down to about 18 in above the floor (Pub. 1478, pp. 8–12; perspective view; cross-section).
• Above-ground and part-underground cellars: plans in USDA FB 1939 (1960) (partly underground cellar; outdoor cellar, side view).
• Unheated outbuilding, porch or garage: works for squash, onions and dry goods — not for the cold & moist group.

📚 Go deeper: Canada A Practical Farm Root Cellar — full plan, p. 2; Novia Handbook for Building a Root Cellar — photo step by step; USDA FB 1939 (1943) — cellars, pits and banks; Wikipedia: root cellar.

🕳️ Pits, clamps, buried barrels — and the garden itself

• Cone pit (USDA FB 1939 (1943), p. 16; cross-section): on well-drained ground, dig 6–8 in deep, line with straw or leaves, pile the vegetables in a cone, cover with straw, then 2–3 in of earth, thickened as winter comes. Leave a tuft of straw sticking out the top as a vent and cap it with a board. Open a pit all at once and use a new spot each year (FB 1939 (1960), p. 9).
• Clamp (long mound) for potatoes: a straw bed, a vent duct along the bottom, about 8 in of packed straw and up to 12 in of soil; in mild climates use more straw and less soil (FAO Prevention of Post-Harvest Losses; clamp drawing).
• Buried barrel or trash can: a clean food-safe barrel laid in the ground on a slant so water runs out, mouth facing the path, covered with straw and earth (USDA FB 1939 (1943), p. 18; barrel pit; buried trash can). Line or wrap it with ¼-inch hardware cloth against gophers and voles (rule of thumb).
• Leave it in the ground (in-garden and mound storage): parsnips, carrots, beets, leeks, kale, collards and rutabagas can stay in the garden through most Illinois Valley winters — in raised or ridged beds so roots don't rot in waterlogged soil, with straw over the roots in hard cold (FB 1939 (1960), pp. 14–17; PNW 548; raised beds). Gophers and voles are the main risk.

A cone pit: straw around the vegetables, earth over the straw, a straw vent up the middle capped with a board, and drains around it (USDA FB 1939 (1960), p. 9).

📚 Go deeper: USDA FB 1939 (1943) — pits, banks and barrels, pp. 16–18; FAO — potato clamps.

❄️ Cooling without power

• Springhouse: water from a spring or deep well sits near ground temperature — about 52–55 °F here (rule of thumb). Run it through an insulated tank or a shaded stone trough and stand crocks, milk cans and butter in it (USDA FB 976; insulated cooling tank). See springhouse.
• Evaporative cooler — made for our dry summers: a screened cabinet covered in flannel or burlap, kept wet by wicks from a pan of water on top, in shade and breeze. In hot, dry weather it can hold about 50 °F inside; it works poorly in humid weather (USDA The Iceless Refrigerator). Bigger versions use a wall of wet charcoal, or a double brick wall with wet sand between (about 400 bricks keeps 220 lb of produce), wetted twice a day (Practical Action Evaporative Cooling, p. 2; charcoal cooler; brick cool chamber). The clay-pot zeer is the small version (Homestead-Skills\Food-Crafts-Tools; how it works; pot sizes).
• Ice house: ice packed in at least 15 in of sawdust on all sides, on a drained floor, keeps through summer (USDA FB 475, pp. 6, 12–13; insulation diagram). Valley ponds rarely freeze thick, but the bulletin shows freezing ice in metal cans on cold nights. Realistically a small ice store is a winter-only luxury here.

The brick cool chamber: keep the sand between the two brick walls wet and the food inside stays cool (Practical Action, p. 3).

📚 Go deeper: USDA The Iceless Refrigerator; Practical Action — charcoal and brick coolers; USDA FB 475 Ice Houses.

☀️ Drying food

Our hot, dry late summer is ideal drying weather. Sun drying needs about 90 °F, low humidity and clean air; dependable drying needs several days in a row near 95 °F (PNW 651, p. 16).

• Trays: wooden frames with food-safe screen (not galvanized); cover with cheesecloth or netting against insects; bring trays in at night so dew doesn't re-wet the food (USDA FB 984, pp. 13–14; screened solar drier).
• Solar dryer: a dark box with a clear top, vents low and high, and screened trays — a 3×6 ft dryer serves a household of 4–6 (Practical Action A Simple Solar Dryer; layout); more designs in the Peace Corps solar food technologies manual and Practical Action Solar Drying (cabinet and tent dryers).
• Is it dry? Fruit is leathery with no moist center (photos); vegetables are brittle. Squeeze a handful of fruit: it should spring apart "like rubber bands." Then condition it at least 2–4 days in a covered jar, shaking daily — if moisture beads up, dry it more (USDA FB 984, p. 47; PNW 651, pp. 17–19).
• Don't dry outdoors in wildfire smoke — ash settles on the food (rule of thumb).
• Jerky: PNW 632 (dry enough: cracks, doesn't snap). Store everything dry in sealed jars.

A solar dryer's parts: clear cover, mesh trays, a black-painted box with air inlets low and outlets high (Practical Action, p. 2).

📚 Go deeper: PNW 651 Drying Project Manual — fruit-by-fruit and vegetable-by-vegetable; USDA FB 984 Farm and Home Drying — sun driers and evaporators.

🥓 Curing and smoking meat

Dry-cured country ham and bacon keep without refrigeration once cured, smoked and aged.

• Cure in the cold season: meat must stay 36–40 °F for the whole cure — warmer risks spoilage, colder stops the salt from soaking in (USDA Curing Pork Country Style, p. 5). Here that means December–February, in a cellar or shed vented on cold nights. Carver's bulletin covers curing where winters are too warm (Carver 1912).
• The cure: about 8 lb salt + 2 lb sugar per 100 lb of meat, rubbed in, repeated after about a week; 1½–2 days per pound of ham (parts of a ham; rubbing in the cure; Virginia Tech 458-223, p. 3; Kentucky ASC-213). Curing salt (nitrite) must be weighed exactly — use a commercial premix by its label.
• Smoke with hardwood (never pine) at 100–120 °F for cured pork (Leaflet 273, p. 8). A barrel smoker at the top of a sloping covered trench, fire at the bottom, is the simplest smokehouse (USDA AWI-68; firebox plan).
• Store: wrap cooled hams, bag in muslin or paper (wrapped and bagged), and hang in a dark, dry, airy, rat-proof place; skipper flies don't breed below 45 °F (Leaflet 273, p. 8; ham pests).
• Fish: dry-salting keeps longer than brining in warm weather (Fishery Leaflet 18, p. 5); hot-smoke fish to safe temperatures (PNW 238; smoker layout).

📚 Go deeper: Kentucky How to Make a Country Ham — modern step by step; USDA Curing Pork Country Style; Fishery Leaflet 18; Wikipedia: country ham.

🥬 Fermenting, salting, eggs and vinegar

• Sauerkraut: 2½% salt — 1 lb salt to 40 lb cabbage (about 3 Tbsp per 5 lb); pack in a crock (crocks and jars), weight it so brine covers the cabbage, skim scum. Ferment 3–4 weeks at 70–75 °F or 5–6 weeks at 60–65 °F; below 60 °F it may not ferment, above 75 °F it goes soft (USDA FB 1438, p. 14; USDA canning Guide 6). Old bulletins say 86 °F and paraffin seals — don't.
• Salted vegetables (beans, greens, corn) in crocks: recipes in the 1918 Food Administration bulletin.
• Eggs for months (USDA says 6–9, FAO only 1–6; plan on the shorter — see the Preserving guide): fresh, clean, uncracked spring eggs in a crock of 1 quart water glass (sodium silicate) to 9 quarts boiled, cooled water, with 2 in of liquid over them; or clear lime water. Prick the shell before boiling (USDA Home Methods of Preserving Eggs).
• Vinegar: fruit juice → alcohol (yeast) → vinegar (air-loving bacteria). Leave the container open to air under cheesecloth and keep it at least 70 °F (USDA FB 1424; barrel "converter").

📚 Go deeper: USDA FB 1438 Fermented Pickles and Sauerkraut; USDA canning Guide 6 — fermented foods; Wikipedia: sauerkraut.

🐀 Keeping rats, mice and bugs out

• Mice get through ¼-inch gaps. Use ¼-inch hardware cloth on vents and storage bins (rule of thumb); line corncribs and grain bins with galvanized hardware cloth (USDA Rat Proofing Buildings, p. 10; rat-proof grain bin and walls).
• Foundations: concrete curtain walls 2 ft below ground, and metal or stucco on lath 2 ft up the walls, stop burrowing rats (Rat Proofing, p. 8; concrete curtain wall).
• Grain, beans and dried food in metal or glass with tight lids. Freeze dry beans and grain 2–3 days, warm them a day, then freeze again (freezing alone misses some eggs), or heat them, to kill weevils — not the old chemical fumigants (USU, p. 95).
• Cats, traps and tidiness — no open feed, no clutter for nesting.

📚 Go deeper: USDA Rat Proofing Buildings and Premises; Food From Scratch — storing grain.

📆 A storage year in the Illinois Valley (rule of thumb)

Month	Do this
Aug–Sept	Sun-dry fruit, tomatoes, beans and herbs. Cure onions and garlic in shade, then braid or bag.
Oct	Cure winter squash and pumpkins on a sunny porch, then into a 50–55 °F room. Cure potatoes 1–2 weeks, then into the dark.
Nov	Start night-venting the cellar as nights drop into the 30s. Move apples, potatoes, carrots, beets and cabbage in as it cools. Mulch roots left in the garden.
Dec–Feb	Coldest stretch: cure hams and bacon; make sauerkraut slowly; check stored food weekly.
Mar–Apr	Use up cellar crops before they sprout; replant the best roots for seed (see the Seed Bank guide). Put up spring eggs in water glass.
May–July	Cellar warms toward 55 °F: dry goods, squash, canned and dried food only. Evaporative cooler and springhouse for butter, milk and greens.

📚 Go deeper: PNW 548 Winter Vegetable Production — winter crops west of the Cascades; WSU Storing Vegetables and Fruits at Home — storage times and temperatures.

🖼️ Pictures & diagrams

Look before you try it. 🖼️ = drawings in the books on this drive; 📷 = photos in the offline Wikipedia.

Ground temperature and the crops

• Ground-temperature map and yearly soil curve — MSU Earth Tempering, p. 3
• Storage crops — Potato; Winter squash; Sweet potato; Onion; Garlic
• Green potatoes — Solanine
• Why apples are kept apart — Ethylene as a plant hormone

Root cellars and storage rooms

• Plan of a 10×14 ft farm root cellar — Canada FB 98, p. 3; Root cellar
• Root cellar plan, section and elevations — Novia, p. 11; p. 12
• How air flows through a cellar — Novia, p. 43
• Cellar cross-section with vents, slat floor and bins — USDA FB 1939 (1943), p. 14
• Outdoor cellar, end and side views — USDA FB 1939 (1943), p. 12
• Partly underground stone cellar — USDA FB 1939 (1960), p. 7
• Basement-corner storage room — Pub. 1478, p. 9; cross-section, p. 11
• Humidity gauge — Hygrometer

Pits, clamps and barrels

• Cone pit of potatoes — USDA FB 1939 (1943), p. 16
• Potato clamp — FAO, p. 104
• Barrel pit — USDA FB 1939 (1943), p. 18
• Cabbage pit and pen — USDA FB 1939 (1943), p. 20
• In-garden, mound and buried-can storage — WSU EB1326, p. 2; p. 3
• Roots left in the field — PNW 548, p. 46
• The diggers — Pocket gopher; Vole

Cooling without power

• Insulated spring-water cooling tank — USDA FB 976, p. 7; Spring house
• Charcoal cooler and brick cool chamber — Practical Action, p. 2; p. 3; Evaporative cooler
• Clay-pot cooler (zeer) — Practical Action, p. 3; Pot-in-pot refrigerator
• Ice-house insulation — USDA FB 475, p. 7; Ice house

Drying, curing and smoking

• Screened solar drier — USDA FB 984, p. 16
• Brick-and-plastic solar dryer — Practical Action, p. 2
• Country ham: cure, wrap, bag — Kentucky, p. 3; p. 4; Country ham
• Ham pests: skipper, larder beetle, mites — Virginia Tech, p. 5; Piophila casei
• Farm smokehouse firebox — USDA AWI-68, p. 8; Smokehouse

Ferments, eggs, vinegar and pests

• Crocks for kraut — USDA FB 1438, p. 5; Sauerkraut
• Vinegar barrel — USDA FB 1424, p. 12; Mother of vinegar
• Rat-proof grain bin and concrete curtain wall — USDA FB 1638, p. 10; p. 21; Brown rat

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🔗 Related guides

• Storing Energy Without Batteries — how much cold ice and cold water hold, and making ice in cans
• Your Seed Bank — growing what goes into storage
• Food From Scratch — grain, flour, lard, salt
• Illinois Valley — Start Here
• Make-Do Household Guide
• Horses, Mules and Draft Animals