Local planting guide · Midwest
zip 60674
Chicago is in USDA hardiness zone 6b, with average winter lows of -5°F to 0°F. The local growing season runs roughly 04/11 through 10/31 (~201 days). This zip falls within the Midwest growing region.
- USDA zone
- 6b -5°F to 0°F
- Last spring frost
- 04/11
- First fall frost
- 10/31
- Growing season
- 201 days
- Compatible crops
- 87
- Growing region
- Midwest
Right now in Chicago
Week 18 priorities
On the docket: transplant out after last frost · direct sow after last frost. See the full calendar →
Gardening in Chicago
Chicago sits at the continental edge of zone 6b, where winter lows routinely hit -5 to 0°F. Cold hardiness isn't the constraint here; modern fruit varieties handle this range. Instead, the real issue is the unpredictability of spring. With a last spring frost date of April 11, gardeners must wait until mid-spring before risking tender crops, which compresses the early growing season. Fall arrives earlier than it might in lower zones, with the first frost typically coming October 31. The 201-day growing season is sufficient for tree fruits that need winter chilling, but less forgiving for long-season heat-lovers like peaches and late-ripening crops.
Chicago's climate advantage is precisely that winter chill. Apples, pears, cherries, and European plums thrive here because they need significant chill hours to break dormancy. Such cold is hard to come by in much of the South and West. Peaches and Japanese plums are less reliable in Chicago winters, though cold-hardy varieties exist. The challenge comes in May, when warm spells cause early bloom, followed by hard frosts that kill flowers and set fruit. Summer heat and humidity are moderate compared to southern climates, but soil moisture becomes critical in July and August.
Regional context · Midwest
What the Midwest brings to Chicago
Continental humid. Cold winters, hot humid summers. Heart of the country's vegetable, sweet corn, and cool-climate fruit production. Michigan and Wisconsin are major fruit states.
Common challenges
Issues that most often defeat home gardeners in zone 6b, drawn from the broader USDA zone profile.
- ▸ Cedar-apple rust
- ▸ Fire blight
- ▸ Stink bugs
What defeats new gardeners in Chicago
Late-spring frost damage to early bloomers is the signature Chicago problem. Apple and pear blossoms appear in late April and early May, often weeks before the April 11 average last frost. A frost in late April or early May can wipe out an entire year's crop. Gardeners must choose late-blooming varieties or be prepared to provide frost protection with sprinklers or frost cloth.
Summer humidity creates conditions for fungal diseases that rarely threaten drier zones. Apple scab, powdery mildew, and cherry leaf spot thrive in Chicago's June-August moisture. Pest populations also boom in this climate; Japanese beetles and borers find ideal conditions.
A third issue is winter moisture. Chicago's lake-effect snow and thaw cycles can lead to root rot in poorly drained sites and winter damage to young trees if soil stays waterlogged.
Crops that grow in Chicago
87 crops from our catalog match zone 6b, grouped by type.
Tree fruit
12 crops
zone 6b Apple
Malus domestica
zones 3a–9a
zone 6b Pear
Pyrus communis
zones 4a–8b
zone 6b Peach
Prunus persica
zones 5a–9a
zone 6b European Plum
Prunus domestica
zones 4a–8a
zone 6b Japanese Plum
Prunus salicina
zones 5b–9a
zone 6b Sweet Cherry
Prunus avium
zones 5a–8a
zone 6b Sour Cherry
Prunus cerasus
zones 4a–7b
zone 6b American Persimmon
Diospyros virginiana
zones 4b–9a
Berries
20 crops
zone 6b Highbush Blueberry
Vaccinium corymbosum
zones 4a–7b
zone 6b Lowbush Blueberry
Vaccinium angustifolium
zones 3a–6b
zone 6b Red Raspberry
Rubus idaeus
zones 3b–8a
zone 6b Black Raspberry
Rubus occidentalis
zones 4a–8a
zone 6b Yellow Raspberry
Rubus idaeus
zones 3b–8a
zone 6b Blackberry
Rubus subgenus Rubus
zones 5a–9a
zone 6b June-Bearing Strawberry
Fragaria x ananassa
zones 3a–8b
zone 6b Everbearing Strawberry
Fragaria x ananassa
zones 3b–9a
Nuts
6 crops
Vegetables
40 crops
zone 6b Tomato
Solanum lycopersicum
zones 3a–10b
zone 6b Sweet Pepper
Capsicum annuum
zones 4a–10b
zone 6b Hot Pepper
Capsicum species
zones 4a–10b
zone 6b Eggplant
Solanum melongena
zones 5a–10b
zone 6b Potato
Solanum tuberosum
zones 3a–9a
zone 6b Cabbage
Brassica oleracea var. capitata
zones 3a–9b
zone 6b Broccoli
Brassica oleracea var. italica
zones 3a–9a
zone 6b Cauliflower
Brassica oleracea var. botrytis
zones 3b–9a
Herbs
9 crops
zone 6b Basil
Ocimum basilicum
zones 4a–10b
zone 6b Parsley
Petroselinum crispum
zones 3b–9b
zone 6b Cilantro / Coriander
Coriandrum sativum
zones 3b–9b
zone 6b Dill
Anethum graveolens
zones 3b–9a
zone 6b Oregano
Origanum vulgare
zones 4a–9b
zone 6b Thyme
Thymus vulgaris
zones 4a–9a
zone 6b Sage
Salvia officinalis
zones 4a–9a
zone 6b Mint
Mentha species
zones 3b–9b
Plan the year
Planting calendar for Chicago
Year-view of seed starting, transplanting, planting, pruning, fertilizing, harvest, and pest-watch windows tuned to Chicago's local frost dates.
Week ? · loading
This week in Chicago, IL (zone 6b)
Quiet week in Chicago, IL (zone 6b). this week is a good time to step back and plan ahead.
Nothing critical on the calendar this week.
434 bars · 87 crops
Calendar logic combines NOAA frost normals with crop-specific timing data. Local microclimate and weather always overrules the calendar; use this as a starting point.
Top pests for zone 6b
Ranked by how many crops in your zone they affect. Click through for IPM controls and signs to watch for.
Multiple species (Aphididae)
Small soft-bodied sap-sucking insects that reproduce explosively in spring. Excrete honeydew that supports sooty mold and attracts ants. Transmit viral diseases.
Odocoileus species
Whitetail and mule deer browse can devastate orchards and gardens, particularly in winter when food is scarce. Antler rub on young trunks kills saplings outright.
Multiple species
Robins, catbirds, mockingbirds, starlings, cedar waxwings and other songbirds can strip ripening berry and fruit crops in days. Crows and blackbirds also damage fresh sweet corn ears in milk stage. The single biggest yield-loss factor in unprotected home plantings.
Sylvilagus and Lepus species
Cottontails and jackrabbits strip bark from young fruit trees in winter and graze tender garden vegetables year-round, especially seedlings.
Popillia japonica
Defoliating beetle introduced to North America in 1916. Skeletonizes leaves of many fruit trees, berry canes, and pecan.
Multiple species (Chrysomelidae)
Tiny black or bronze jumping beetles that put hundreds of small holes in seedling leaves. Most damaging on direct-seeded brassicas and young eggplant.
Tetranychus urticae
Tiny mite that feeds on leaf undersides, causing stippling and webbing during hot dry weather.
Microtus species
Field voles and meadow voles girdle young fruit-tree trunks under snow cover during winter and chew root crops. The leading cause of mysterious orchard losses.
Top diseases for zone 6b
Ranked by how many crops in your zone they affect. Click through for symptoms, controls, and resistant varieties.
Botrytis cinerea
Ubiquitous fungal disease that causes fruit rot during cool wet weather, often the dominant berry disease in humid regions.
Pseudoperonospora cubensis (cucurbits) and others
Water mold (oomycete, not a true fungus) that thrives in cool damp conditions. Spreads rapidly through cucurbit and brassica plantings on wind-borne spores.
Pythium and Rhizoctonia species
Soil-borne complex of water molds and fungi that kill seedlings before or shortly after emergence. The single most common cause of seed-starting failures.
Cucumber mosaic virus, Tobacco mosaic virus, and others
Family of plant viruses producing mottled yellow-and-green leaf patterns. Vectored primarily by aphids; some are seed-transmitted or spread by handling tools and tobacco products.
Agrobacterium tumefaciens
Soil-borne bacterium that enters plants through wounds and induces tumor-like galls on roots, crown, and lower stems. Galls reduce vigor and shorten plant lifespan; on Rubus the disease is often fatal.
Fusarium oxysporum
Soil-borne fungal disease that plugs vascular tissue and kills affected plants. Persists in soil for many years; impossible to eliminate once established.
Sclerotium rolfsii
Soil-borne fungal disease most damaging in warm humid Southern conditions. White mycelial fans and small mustard-seed-sized sclerotia at the soil line are diagnostic.
Plasmodiophora brassicae
Soil-borne disease causing characteristic distorted club-shaped roots on brassicas. Persists in soil for 10-20 years; the dominant brassica pathogen in acidic poorly-drained soils.
Companion planting suggestions
Beneficial pairings drawn from companion data, filtered to crops that grow in zone 6b.
- Peach + Garlic
Garlic planted around peach trees suppresses peach borer and provides general fungal-pressure reduction.
- European Plum + Garlic
Garlic discourages plum curculio and provides general antifungal benefit beneath stone fruit.
- American Persimmon + Pawpaw
Both natives thrive in similar soils and contribute to a polyculture that supports native pollinators and fauna.
- Jujube + Thyme
Thyme groundcover suits jujube's low-water profile and deters cabbage moth and aphid populations.
- Apricot + Basil
Basil's volatile oils discourage stone-fruit pests and support pollinator visits.
- Highbush Blueberry + Thyme
Creeping thyme thrives in the acidic mulched conditions blueberries require and attracts pollinators during bloom.
Soil types reference
Soil texture and pH decide what grows easily on your specific lot. Find the closest match below for crop recommendations and amendment guidance.
Practical tips for Chicago
Late-blooming varieties are essential for Chicago gardeners. Honeycrisp and Braeburn apples bloom later than McIntosh or Gala, reducing frost risk. For cherries, Montmorency (sour cherry) blooms later than sweet cherry varieties. This single choice eliminates the frost-damage problem most years.
Pruning should occur in late winter (February) before the April 11 frost date. This allows pruning wounds to callus over without risk and removes branches prone to disease. Thinning flower buds in May after the last frost passes directs energy into fewer, larger fruits.
Irrigation planning is critical for July and August. Chicago summers can have two to three weeks without meaningful rain during the ripening period. Drip irrigation or soaker hoses prevent stress-cracking and splitting in stone fruits, and improve sugar content in apples.
Frequently asked questions
- What fruit trees grow best in Chicago?
Apples (late-blooming varieties like Honeycrisp, Gala, Braeburn), pears, European plums, sour cherries, and American persimmons all thrive. Japanese plums and peaches are unreliable due to winter cold; only very hardy cultivars like Reliance (peach) survive consistently.
- When should I plant fruit trees?
Spring (March-April, after soil thaws but before the April 11 frost date) or fall (September-October, before soil freezes). Fall planting often gives roots more time to establish before winter.
- When should I start seeds for heat-loving crops indoors?
For crops like tomatoes or peppers, start seeds indoors 6-8 weeks before the April 11 last frost date, roughly early February. Transplant seedlings outdoors after the frost date passes and soil warms, typically mid-to-late May.
- What's the biggest weather risk in Chicago?
Late spring frosts kill cherry and apple blossoms most years. Warm spells in April-May trigger bloom weeks before the April 11 average last frost, then hard freezes follow. Choose late-blooming varieties and monitor the 10-day forecast during this window.
- How much winter chill do fruit trees need here?
Apples, pears, and European plums need 800-1200 chill hours below 45°F. Chicago reliably provides 1000+ hours, so standard varieties break dormancy properly. This is a major advantage over warmer zones.
- Can I grow peaches in Chicago?
Peach buds are hardy only to about -10 to -15°F, and Chicago can drop to -5 to 0°F. Very hardy varieties like Contender or Reliance survive, but standard peaches often suffer bud kill. Sour cherries are the safer stone fruit.
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Frost data: NOAA Climate Normals 1991-2020, station USW00014819. Local microclimates can shift these dates by a week or more.
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