Local planting guide · Midwest
zip 60688
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's 201-day growing season and zone 6a winter minimums of -10 to -5°F create a moderately cool growing window where hardy fruits thrive. The city sits at the convergence of continental winters from the north, Great Lakes moisture from the east, and summer heat from the south. This convergence shapes what grows well: tender crops like peaches struggle in warmer zones due to disease but find better control in Chicago's cooler, more humid summers, though they remain borderline for winter survival without careful site selection.
Sample crops suited to Chicago include apples, pears, European and Japanese plums, sweet and sour cherries, and American persimmons. These share hardy wood and relatively short chill-hour windows, making them far more reliable than warm-season staples that dominate gardens in hotter climates. The last spring frost arrives April 11 and the first fall frost October 31, giving a tight window that rules out longer-season varieties but allows multiple plantings of quick-maturing greens and root crops. Humidity is a constant trade-off: it supports lush growth but encourages fungal diseases like apple scab and powdery mildew across the orchard range.
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 last-spring-frost date catches early bloomers off guard, especially sweet cherry and peach. Frost damage to open flowers is common in years with warm March weather followed by an April cold snap. Humidity and wet springs create ideal conditions for apple scab and powdery mildew, which spread rapidly in June and July. Sour cherry and European plum, while hardy, often show fungal leaf spotting by midsummer if air circulation is poor. The October 31 first-fall-frost date also arrives earlier than expected, cutting short the ripening window for later varieties of peach, European plum, and some Japanese plum cultivars. Late-harvest attempts often result in fruit that never fully colors or ripens.
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
Delay planting until soil has warmed to at least 50°F in spring, typically mid-April for Chicago. Waiting well after the April 11 average last frost avoids both soil rot from early cold and unexpected frost damage to tender new growth. Early plantings in cool, waterlogged soil often fail to establish before summer.
Choose disease-resistant apple and pear varieties (look for scab resistance in the variety description) and space trees 20% wider than standard recommendations to increase air circulation and reduce humidity-driven fungal pressure. In Chicago's humid summers, closely spaced trees accumulate surface moisture that favors scab and mildew.
For peaches and Japanese plums, select a south-facing slope or wall to extend the ripening window and ensure fruit colors fully before the October 31 frost arrives. North-facing sites struggle to accumulate enough heat and often leave fruit unripe or damaged by early fall frosts.
Frequently asked questions
- What fruit crops are most reliable in Chicago?
Apples, pears, sour cherries, and European plums are nearly bulletproof in zone 6a. Sweet cherries, Japanese plums, and American persimmons succeed in favorable microclimates. Peaches are possible but require careful variety selection and a warm site; many fail in Chicago winters or never fully ripen by October 31.
- Why do my early-spring flowers freeze even after warm March weather?
The April 11 last-spring-frost date is deceptively late. March warm spells often trigger early bloom in varieties adapted to warmer climates, then an April freeze kills open flowers. Choose bloom-resistant varieties or delay planting tender-blooming types until after April 11 has passed.
- What is the biggest weather risk for Chicago gardeners?
Late-spring frost damage to early bloomers and the compressed 201-day growing season from April 11 to October 31. The early fall frost cuts short ripening time for heat-loving crops and often leaves late varieties unripe or damaged.
- How do I prevent apple and pear fungal diseases?
Choose disease-resistant varieties, especially for apple scab. Space trees widely to allow air circulation, thin fruit to reduce disease-favorable humid microclimates, and apply preventive fungicide (sulfur or neem) starting in late April before scab spores mature.
- Can I grow peaches in Chicago?
Yes, but only in favorable sites. Select cold-hardy varieties like 'Reliance' or 'Contender,' plant on a south-facing slope, and mulch heavily for winter protection. Even then, frost damage to buds and incomplete ripening before October 31 are common.
- When should I plant trees or transplants?
Bare-root fruit trees should go in the ground by late April, after soil warms but before summer heat. Container transplants (tomatoes, peppers) can wait until mid-May when soil consistently exceeds 60°F and frost risk is negligible.
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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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