Local planting guide · Midwest
zip 60629
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 in the transition zone between deep winter cold and the more temperate regions to the south. Zone 6a winters reach -10 to -5°F, cold enough to eliminate many tender varieties but not so extreme as to limit options severely. The real challenge is the compressed and unpredictable spring. The 201-day growing season runs from April 11 (last spring frost) to October 31 (first fall frost), giving gardeners two genuine seasons: spring planting and fall activity. Late-season cold snaps often catch tender plants mid-growth, leaving little margin for error.
Stone fruits (peaches, plums, cherries) and apples thrive here because they've evolved to handle exactly this climate pattern. The cold winter actually benefits them by satisfying chilling requirements reliably. Pears are equally at home. American persimmon does well in zone 6a and performs better here than in warmer zones where humidity pressures increase. The 201 days is enough for most standard varieties to ripen properly before the October 31 frost.
The Chicago-area specific factor is humidity and summer disease pressure. Late spring frosts, while a concern everywhere in zone 6a, are particularly problematic when they hit during the April-to-early-May bud-break window. Many failures come not from winter cold but from April frosts killing freshly emerged growth.
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
Late spring frosts are the primary culprit. April 11 is a statistical date, not a guarantee; frosts have occurred into mid-April in Chicago growing seasons. If trees break dormancy early during a warm spell in March, an April freeze will kill flower buds before they even bloom, eliminating that year's crop. This is particularly hard on early-blooming stone fruit varieties.
Summer humidity brings fungal pressure uncommon in drier zone 6a regions. Powdery mildew on apples, cedar-apple rust on nearby juniper trees, and various leaf spots thrive in the Midwest's combination of warm days and dewy mornings. Disease management becomes active, not passive.
Soil pH is often overlooked. Chicago-area soils trend slightly alkaline, which can lock up micronutrients for acid-loving plants, making them poor choices here without significant amendment.
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, choose late-blooming apple and cherry varieties to reduce frost damage risk. Late-blooming types naturally break dormancy after early April, improving the odds that the April 11 frost won't hit open flowers. Avoid early-season types that set buds in March.
Second, manage spring frost risk by avoiding low spots where cold air settles. Hillsides and well-drained sites frost later in spring. Frost pockets in valleys or near buildings can be 5 to 10 degrees colder during clear April nights.
Third, plan summer disease management into your calendar. Spray schedules for common fungal issues (apple scab, powdery mildew) should be in place by June, not improvised when problems appear. Preventive applications in July are more reliable than reactive sprays in August.
Frequently asked questions
- What are the best fruit trees to grow in Chicago?
Apple, pear, sour cherry, sweet cherry, and plum varieties are all reliable in zone 6a Chicago. Apples and pears are the safest choices; both have many cold-hardy varieties suited to the -10 to -5°F winter range. Sour cherry is particularly reliable and generally escapes frost damage better than sweet cherry because it breaks dormancy slightly later.
- When should I plant tender annuals and vegetables in Chicago?
Wait until after April 11 (the average last spring frost date) to plant tomatoes, peppers, and tender annuals directly in the ground. Starting seeds indoors 6 to 8 weeks earlier (mid-February) gives these plants a head start; transplant them after frost danger passes.
- What's the biggest weather threat to gardeners in Chicago?
Late spring frosts in April are the most damaging. Winter cold is extreme, but fruit trees are dormant and adapted to it. The real risk comes when warm weather in late March triggers early bud-break; an April freeze then destroys those buds before they bloom, eliminating that year's crop.
- Can you grow peaches in Chicago?
Yes, but with care. Peach trees survive zone 6a winters, but late spring frosts are risky because peach blooms earlier than apple or cherry. Cold-hardy peach varieties bred for northern zones perform better than southern-origin types. A frost-protected site on a slope helps considerably.
- How long is the actual growing season in Chicago?
201 days, from April 11 to October 31. This is long enough for most standard apple and pear varieties to ripen completely before the fall frost. Early-season apples finish by August; later types ripen right up to the October 31 frost.
- What's the frost risk timeline for spring in Chicago?
The average last spring frost is April 11. However, danger isn't truly over until mid-to-late April because cold snaps can occur after that date. Hardy perennials and established fruit trees tolerate April frosts; tender annuals and newly leafed growth are much more vulnerable.
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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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