Local planting guide · Midwest
zip 60659
Chicago is in USDA hardiness zone 6a, with average winter lows of -10°F to -5°F. The local growing season runs roughly 04/16 through 10/28 (~193 days). This zip falls within the Midwest growing region.
- USDA zone
- 6a -10°F to -5°F
- Last spring frost
- 04/16
- First fall frost
- 10/28
- Growing season
- 193 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
Gardening in Chicago sits at the intersection of a moderate growing season and significant winter cold. The 193-day frost-free window (April 16 to October 28) supports a solid range of fruit and vegetable crops, but the zone 6a winter minimum of -10 to -5°F eliminates tropical crops and many tender perennials without protection. The city's proximity to Lake Michigan provides modest climate moderation, though late spring freezes remain a genuine threat. Apples, pears, plums, and cherries thrive here when chosen for cold hardiness and disease resistance. Stone fruits like peaches require careful site selection and frost-protective techniques, since warm spells in March often trigger bud break before the April 16 frost date, leaving new growth vulnerable to the freeze that follows. The real gardening advantage in Chicago is the range of tried-and-tested cold-hardy varieties that excel in this exact zone. The dominant constraint is not cold survival, but late-spring frost timing and the fungal disease pressure that follows the warm, humid summers typical of the region.
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 Chicago calendar creates two critical pressure points for home gardeners. First, false springs are common: warm spells in March trigger bud break in apples and stone fruits, but frost often returns by mid-April (the local last-spring-frost date), blackening new growth and destroying the year's crop. Early-blooming varieties suffer most; late-blooming selections reduce this risk significantly. Second, the warm, humid summers create ideal conditions for fungal diseases, especially apple scab and cedar-apple rust on apples and pears, and brown rot on stone fruits. Well-drained soil is essential but not universal in Chicago; clay soils common to the region trap moisture and worsen disease. Winter temperature swings, while rarely dropping below zone 6a extremes, can cause bark splitting on thin-barked trees if rapid freezing follows unusual warmth in late winter.
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
Choose late-blooming apple and pear selections to sidestep Chicago's freeze-tender early spring. Early-blooming varieties often lose their flower buds to the April 16 frost window, while late bloomers escape it more consistently. Second, amend heavy clay soils with sand and compost to improve drainage before planting; fungal disease control depends as much on air circulation and dry foliage as on variety selection. Till in 2 to 3 inches of compost before setting out fruit trees. Third, treat the October 28 first-frost date as the anchor for tender crops. Tomatoes, peppers, and basil must be in the ground or started indoors by late June to mature before that date; waiting until early July often means a failed fall harvest.
Frequently asked questions
- What fruit trees grow best in Chicago zone 6a?
Apples, pears, sour cherries, and cold-hardy plums are the strongest performers. European plums are more reliable than peach in most Chicago locations, though peach can work in protected, south-facing sites with late-blooming selections. American persimmon is hardy but slow-fruiting. Avoid early-blooming varieties of any stone fruit; late bloom is essential to sidestep the April 16 frost window.
- When should I start seeds indoors, and when is the last frost date?
April 16 is the average last spring frost date in Chicago. Start warm-season crops (tomatoes, peppers, basil) indoors 6 to 8 weeks before that date, moving them outside only after mid-April. Cool-season crops (lettuce, spinach, peas) tolerate light frost and can go in the ground a few weeks before April 16 if hardened off.
- Why do my apple and pear buds freeze every spring?
Late freezes in March or early April arrive after warm spells trigger bud break. Late-blooming selections escape the worst of the April 16 frost date more consistently than early bloomers. Choose varieties carefully for bloom timing, and avoid planting in frost pockets where cold air pools.
- How do I manage apple scab and other fungal diseases?
Chicago's humid summers create ideal conditions for apple scab and cedar-apple rust. Improve soil drainage by adding compost, thin branches for air circulation, remove leaf litter in fall, and select disease-resistant varieties. Avoid planting pears near cedar trees; susceptibility to cedar-apple rust varies widely by pear type.
- What's the first fall frost date, and when should I plant fall crops?
October 28 is the average first fall frost date. Count backward from that date to determine planting windows: leafy greens need 40 to 60 days, so plant in late August; root crops need 60 to 90 days, so plant in mid-July. Tomatoes and peppers won't mature after mid-July planting.
- Is the 193-day growing season long enough for peaches?
Barely. Peach needs 180 to 200+ frost-free days, and Chicago falls at the short end. Choose ultra-early-ripening selections, provide a south-facing wall or heat-reflecting surface, and maintain consistent irrigation to reduce stress. European plum or sour cherry are more reliable bets for consistent production.
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Frost data: NOAA Climate Normals 1991-2020, station USW00094846. Local microclimates can shift these dates by a week or more.
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