Urban Farmer Harvesting & Storage Guide

Pick at Peak. Store for Quality.

Use crop-specific maturity signals, handle produce gently, cool it appropriately, and match temperature, humidity, light, and ventilation to the crop.

Search the crop chart Open storage finder

Quality begins outdoors

Harvest timing is part of storage

Overmature, bruised, nicked, diseased, or heat-stressed produce will not gain quality in storage. Harvest at the crop’s proper stage, use clean tools, shade the harvest promptly, and store only sound produce.

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Recognize maturity

Use size, color, firmness, rind, seed, stem, and variety-specific signals—not days to maturity alone.

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Handle minimally

Cut crops that resist pulling, protect skins and stems, and avoid piling tender produce into crushing loads.

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Remove field heat

Move harvested produce into shade and its appropriate storage environment as soon as practical.

Storage environments

Temperature and humidity work together

Cold & moist32–40°F · high humidity

Most roots, brassicas, and leafy crops. Perforated bags can help retain humidity in a dry refrigerator.

Cold & dry32–40°F · moderate humidity

Cured onions and garlic need cool conditions plus ventilation and lower humidity.

Cool & moistAbout 45–55°F

Cucumbers, eggplant, peppers, tomatoes, summer squash, and watermelon are sensitive to prolonged chilling.

Cool & dry50–60°F · ventilated

Cured pumpkins and many winter squash store best away from freezing, condensation, and direct sun.

Searchable harvest reference

When to pick and how to store vegetables

Shelf lives are estimates under suitable conditions. Variety, maturity, damage, temperature swings, sanitation, and humidity can shorten them.

Crop	Harvest signal	Storage zone	Conditions	Estimated life	Special handling
Asparagus	6–9 in. spears; established crowns only	Cold & moist	32–40°F; high humidity	Up to 2 weeks	Keep upright
Basil	Tender leaves before flowering	Room temperature	Stems in water	About 5 days	Chills and discolors in refrigeration
Snap beans	Pods tender; seeds still immature	Cold & moist	Above 40°F preferred	About 1 week	Handle gently; prone to chilling injury
Beets	Roots about 1¼–3 in. diameter	Cold & moist	32–40°F; high humidity	Up to 5 months	Remove tops
Broccoli	Tight, green flower buds	Cold & moist	32–40°F; high humidity	About 2 weeks	Cool promptly
Brussels sprouts	Firm heads about 1 in. diameter	Cold & moist	32–40°F; high humidity	About 1 month	Harvest lower sprouts first
Cabbage	Compact, firm head	Cold & moist	32–40°F; high humidity	Up to 5 months	Store only sound heads
Carrots	Desired size; before roots become woody	Cold & moist	32–40°F; high humidity	Up to 8 months	Remove tops
Cauliflower	White, compact curd before it becomes ricey	Cold & moist	32–40°F; high humidity	About 3 weeks	Cool promptly
Sweet corn	Brown silks; kernels release milky juice	Cold & moist	32–40°F; high humidity	About 5 days	Use quickly for best sweetness
Cucumbers	Immature, firm fruit at variety size	Cool & moist	About 55°F	About 1 week	Do not store with apples or tomatoes
Eggplant	Full-sized, glossy fruit before color dulls	Cool & moist	About 55°F	About 1 week	Chilling injury below about 50°F
Kohlrabi	Bulbs 2–3 in. diameter	Cold & moist	32–40°F; high humidity	Up to 2 months	Remove tops
Lettuce	Tender leaves before bolting	Cold & moist	32–40°F; high humidity	About 1 week	Cool promptly and avoid crushing
Muskmelon	Full slip; rind changes beneath netting	Cold & moist	Avoid freezing	About 1 week	Handle ripe fruit gently
Onions	Tops fall; necks tight and scales dry	Cold & dry	32–40°F; moderate humidity	Up to 4 months	Cure 2–4 weeks; ventilate
Parsnips	Desired size, often after light frost	Cold & moist	Near 32°F; high humidity	Up to 4 months	Flavor sweetens in cold storage
Peas	Pods tender and filled for the type	Cold & moist	32–40°F; high humidity	About 1 week	Cool and use quickly
Peppers	Firm fruit at desired size or color	Cool & moist	About 55°F	About 2 weeks	Pitting can occur below about 45°F
Potatoes	Vines die back for storage crop	Dark, cold & moist	40–50°F for frying quality	Up to 6 months	Cure about 14 days; exclude light
Pumpkins	Hard rind, mature color, before frost	Cool & dry	50–60°F; moderate humidity	About 2 months	Protect from temperatures below 45°F
Radishes	Roots up to about 1¼ in. diameter	Cold & moist	32–40°F; high humidity	About 1 month	Remove tops
Rutabagas	Roots at desired size	Cold & moist	32–40°F; high humidity	Up to 4 months	Do not wax
Spinach	Leaves tender and before bolting	Cold & moist	32–40°F; high humidity	About 10 days	Cool promptly
Summer squash	Young, tender fruit about 4–8 in.	Cool & moist	About 55°F	About 1 week	Limit refrigerator storage
Winter squash	Hard rind and mature color before frost	Cool & dry	50–60°F; moderate humidity	2–6 months	Curing varies by type; do not cure Table Queen
Tomatoes	Uniformly pink or red; mature green before frost	Cool room	About 55°F	About 5 days ripe	Do not refrigerate for best quality
Turnips	Roots at desired size	Cold & moist	32–40°F; high humidity	Up to 4 months	Remove tops
Watermelon	Yellow ground spot and dried nearby tendril	Cool & moist	About 55°F	About 2 weeks	Avoid prolonged storage below 50°F

Interactive quick lookup

Crop storage finder

Select a crop

Asparagus

Harvest signal

Storage zone

Estimated life

Curing prepares the crop

Do not confuse curing with ordinary drying

Harvest mature crops

Storage onions, potatoes, pumpkins, and winter squash must reach the proper stage before long storage.

Protect the skin

Dig and carry carefully. Cuts, bruises, broken necks, and punctures become entry points for decay.

Follow crop conditions

Onions need dry ventilation; potatoes need darkness; sweet potatoes require a warm curing period.

Sort before storage

Use damaged produce first. Do not place diseased or rotting crops beside sound produce.

Move to storage

After curing, transfer crops to their correct long-term temperature, humidity, light, and ventilation.

Inspect regularly

Remove soft, sprouting, leaking, or decaying items before problems spread through the stored crop.

A safe harvest routine

From garden to storage

Clean

Use clean tools and containers

Remove soil and crop debris between harvests and avoid containers that held chemicals.

Dry or wash?

Follow the crop

Do not automatically wash storage crops. Extra surface moisture can encourage decay unless produce will be used promptly.

Ventilate

Harvested produce still breathes

Use airflow and appropriate perforation; sealed bags can trap condensation and accelerate spoilage.

Separate

Protect sensitive produce

Keep cucumbers away from apples and tomatoes, exclude light from potatoes, and isolate any decaying item.

Troubleshooting storage loss

What the symptoms suggest

Produce shrivels

Humidity may be too low, air movement excessive, or the crop may have been harvested immature. Use the crop’s correct humidity without sealing in condensation.

Mold or soft rot spreads

Remove affected produce immediately. Check for excess moisture, condensation, damaged crops, inadequate ventilation, and temperatures above the ideal range.

Potatoes turn green

They were exposed to light. Store potatoes in darkness and discard green portions according to food-safety guidance.

Cucumbers, peppers, or eggplant develop pits

These crops may have chilling injury from storage below their preferred range. Use a cool—not near-freezing—location.

Onions sprout or decay

Check curing, neck dryness, humidity, temperature, and airflow. Store only firm, sound bulbs with dry outer scales.

Tomatoes lose flavor and texture

Storage may be too cold. Keep ripe tomatoes around cool room temperature and inspect frequently rather than refrigerating for extended periods.

Food-safety note: This page covers fresh storage only. Freezing, drying, fermenting, pickling, and canning require tested processing instructions from USDA or a university extension source; storage temperatures alone do not make preserved food safe.

Plan the harvest