Local planting guide · Midwest
zip 60694
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 squarely in USDA hardiness zone 6b, where winter temperatures regularly drop to minus 5 to 0 degrees Fahrenheit. The growing season spans roughly 201 days from the last spring frost on April 11 to the first fall frost on October 31, a window moderate enough to support a wide range of hardy crops but tight enough to rule out the longest-season varieties. The signature challenge for Chicago gardeners is the timing of spring; late-winter warm spells often coax fruit trees and early perennials into bloom 3 to 4 weeks before the final frost date, setting up a high-risk scenario for blossom loss when cold air returns. Despite this, zone 6b conditions in Chicago reliably support cold-hardy fruit trees, apples, pears, European plums, sour cherries, and American persimmons. Summer humidity is moderate compared to the Southeast, but it does promote fungal pressure on fruit trees and requires deliberate pruning for air circulation. The soil, often heavy clay accumulated from glacial history, drains slowly and demands amendment, but its water-holding capacity is an asset in a region that doesn't experience severe summer drought.
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
Spring frost injury to fruit tree blossoms stands as Chicago's most consistent challenge. Apples, pears, and cherries break dormancy in response to warm spells common in late March and early April, only to be damaged or completely lost when temperatures plummet back into the teens and twenties. This risk peaks from mid-March through mid-April. A second challenge is the prevalence of fungal diseases, particularly apple scab and cherry leaf spot, fueled by cool springs and humid summers. Heavy rains in May and June create ideal conditions for spore splash and infection. A third issue is the brevity of the warm season for heat-loving crops; starting tomatoes, peppers, and basil outdoors in late May leaves only about 4 to 5 months before the first frost in early November, placing a hard ceiling on late-season ripening.
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
Start seeds indoors by early March, tomatoes, peppers, and basil all benefit from an 8 to 10 week head start before transplanting out after the April 11 frost date. This maximizes the effective growing season and improves odds of mature fruit by first frost. Second, choose late-blooming apple and pear varieties to sidestep the April frost risk; varieties that flower one to two weeks later than standard selections miss much of the spring volatility. Third, site frost-sensitive plants on rising ground or northward-facing slopes where cold air drains downslope; avoid low-lying pockets where cold settles on clear spring nights, a practice that can mean the difference between a full crop and total loss.
Frequently asked questions
- What are the best fruit trees for Chicago gardening?
Cold-hardy apples, pears, European plums, sour cherries, and American persimmons are the reliable core. Seek out winter-hardy varieties rated for zone 6 or below, and consider late-blooming selections to reduce spring frost damage. Stone fruits like sour cherry are more frost-tolerant than sweet cherry in this zone.
- When is the last frost date in Chicago, and what does it mean for planting?
The last spring frost in Chicago averages April 11. Hold off transplanting warm-season crops (tomatoes, peppers, basil) until after this date. Starting seeds indoors 8 to 10 weeks earlier (early March) gets them established by transplant time.
- Why do fruit tree blossoms often get damaged by late frost?
Warm spells in late March and early April trigger premature bud break in fruit trees. When temperatures drop back into the 20s or teens, a common pattern in Chicago springs, the tender flowers are killed. Late-blooming varieties reduce this risk.
- How cold does it get in Chicago, and does it affect plant choices?
Winter temperatures in zone 6b regularly reach minus 5 to 0 degrees Fahrenheit. Choose varieties rated for zone 6 hardiness or below. Many tender cultivars and tropical plants simply won't survive the winter without significant protection.
- What disease issues are most common in Chicago?
Apple scab and cherry leaf spot thrive in the cool, humid springs and early summers typical of Chicago. Prune for air circulation, avoid overhead watering, and select disease-resistant varieties where available. Fungicide applications may be needed in wet springs.
- Can tomatoes and peppers ripen fully before the first fall frost?
Yes, but timing matters. The first frost typically arrives around October 31, giving roughly 5 months of frost-free weather after April 11. Start seeds indoors early, choose shorter-season varieties, and plant early so fruit has time to mature.
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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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