Local planting guide · Midwest
zip 60612
Chicago is in USDA hardiness zone 6a, with average winter lows of -10°F to -5°F. The local growing season runs roughly 04/11 through 10/31 (~201 days). This zip falls within the Midwest growing region.
- USDA zone
- 6a -10°F to -5°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 squarely in USDA hardiness zone 6a, where winter minimum temperatures drop to -10 to -5°F. The growing season stretches 201 days from the average last spring frost on April 11 to the first fall frost on October 31, a window that's adequate but not generous. The dominant constraint is neither cold nor heat but season length. Hardy fruit trees (apples, pears, sour cherries, European plums) thrive with Chicago's winters; peaches and sweet cherries require careful variety selection to escape late frosts. Lake Michigan's proximity moderates temperature swings but creates summer humidity that breeds fungal disease pressure, a trade-off common throughout the region. The clay soils typical of the Chicago area retain moisture well but drain poorly; most fruit trees benefit from raised planting or amended soil. American persimmon and sour cherry are particularly well-suited to the zone and far less common in home gardens than they deserve.
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 6a, drawn from the broader USDA zone profile.
- ▸ Brown rot in stone fruit
- ▸ Japanese beetles
- ▸ Spring frost damage to peach buds
What defeats new gardeners in Chicago
The April 11 frost date is firm by Midwest standards, but freeze-thaw cycles in March can fool early buds. Peach buds often break dormancy in mild Februaries, then die in predictable March hard freezes. This sequence has destroyed more peach crops in Chicago than winter cold ever has. The 201-day growing season is long enough for most temperate fruits but too short for heat-demanding crops like fig in exposed sites; they need south-facing walls or winter protection to produce reliably. Summer humidity, exacerbated by proximity to Lake Michigan, creates ideal conditions for apple scab and cedar-apple rust; neglecting dormant-season spray programs almost guarantees disease pressure.
Crops that grow in Chicago
87 crops from our catalog match zone 6a, grouped by type.
Tree fruit
12 crops
zone 6a Apple
Malus domestica
zones 3a–9a
zone 6a Pear
Pyrus communis
zones 4a–8b
zone 6a Peach
Prunus persica
zones 5a–9a
zone 6a European Plum
Prunus domestica
zones 4a–8a
zone 6a Japanese Plum
Prunus salicina
zones 5b–9a
zone 6a Sweet Cherry
Prunus avium
zones 5a–8a
zone 6a Sour Cherry
Prunus cerasus
zones 4a–7b
zone 6a American Persimmon
Diospyros virginiana
zones 4b–9a
Berries
20 crops
zone 6a Highbush Blueberry
Vaccinium corymbosum
zones 4a–7b
zone 6a Lowbush Blueberry
Vaccinium angustifolium
zones 3a–6b
zone 6a Red Raspberry
Rubus idaeus
zones 3b–8a
zone 6a Black Raspberry
Rubus occidentalis
zones 4a–8a
zone 6a Yellow Raspberry
Rubus idaeus
zones 3b–8a
zone 6a Blackberry
Rubus subgenus Rubus
zones 5a–9a
zone 6a June-Bearing Strawberry
Fragaria x ananassa
zones 3a–8b
zone 6a Everbearing Strawberry
Fragaria x ananassa
zones 3b–9a
Nuts
6 crops
Vegetables
40 crops
zone 6a Tomato
Solanum lycopersicum
zones 3a–10b
zone 6a Sweet Pepper
Capsicum annuum
zones 4a–10b
zone 6a Hot Pepper
Capsicum species
zones 4a–10b
zone 6a Eggplant
Solanum melongena
zones 5a–10b
zone 6a Potato
Solanum tuberosum
zones 3a–9a
zone 6a Cabbage
Brassica oleracea var. capitata
zones 3a–9b
zone 6a Broccoli
Brassica oleracea var. italica
zones 3a–9a
zone 6a Cauliflower
Brassica oleracea var. botrytis
zones 3b–9a
Herbs
9 crops
zone 6a Basil
Ocimum basilicum
zones 4a–10b
zone 6a Parsley
Petroselinum crispum
zones 3b–9b
zone 6a Cilantro / Coriander
Coriandrum sativum
zones 3b–9b
zone 6a Dill
Anethum graveolens
zones 3b–9a
zone 6a Oregano
Origanum vulgare
zones 4a–9b
zone 6a Thyme
Thymus vulgaris
zones 4a–9a
zone 6a Sage
Salvia officinalis
zones 4a–9a
zone 6a 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 6a)
Quiet week in Chicago, IL (zone 6a). 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 6a
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 6a
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 6a.
- 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
First, select peach varieties rated for zone 6a explicitly (not zone 7, not region-flexible). 'Reliance', 'Contender', and 'Polarcrest' bloom late enough to escape March freezes. Plant them on a slope or raised bed to avoid frost pockets. Second, plan the growing season backward from October 31. If a crop needs 90 frost-free days and requires ripening time, start seed by late May or transplant nursery stock by mid-June. Succession planting doesn't apply to long-season tree fruits, but it's essential for anything grown from seed; the calendar compresses quickly. Third, dormant-season spray (oil and sulfur in late March, before buds break) cuts apple scab and rust pressure more effectively than any summer program.
Frequently asked questions
- What fruit trees grow best in Chicago?
Apples and pears are the safest choices; sour cherries and European plums are nearly as reliable. Peaches work well with careful variety selection. Sweet cherries and figs are possible but need south-facing sites and winter protection. American persimmons are cold-hardy and underused.
- When should I plant apple trees in Chicago?
Fall (October through early November, before the ground freezes) or early spring (late March through April, before buds break). Fall planting gives roots a full season to establish. Container-grown trees can go in the ground nearly year-round if watered well through the first summer.
- Why do my peach buds die in spring?
Chicago's freeze-thaw cycles in February and March often prompt buds to swell during mild spells, then hard freezes kill them. Select varieties like 'Reliance' and 'Contender' that bloom later. Avoid planting peaches in frost-pocket low spots where cold air collects.
- How do I control apple scab in my orchard?
The April 11 frost date marks roughly when apple buds emerge. Dormant-season spray with horticultural oil (February-March) before buds break controls overwintering fungal spores. Once leaves emerge, consistent fungicide sprays are necessary in Chicago's humid summers, or switch to resistant varieties like 'Liberty' or 'Priscilla'.
- What's the biggest weather threat to home fruit gardens in Chicago?
Freeze-thaw cycles in March. Warm spells coax buds out of dormancy, then sudden frosts kill the emerging flowers. This affects peaches most severely but can damage any tender fruit crop. Late spring frosts after April 11 are rare but occasionally happen.
- Can I grow figs in Chicago?
Fig culture in zone 6a requires south-facing walls, heavy mulch, or burying the canes in soil for winter and uncovering in spring. Many gardeners in Chicago treat figs as a frost-tender perennial rather than a standard orchard tree. Expect production only in mild years or with winter protection.
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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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