Local planting guide · Midwest
zip 60622
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 sits at the shorter end for the North Midwest, but it's workable for zone 6a fruit trees. The primary constraint is winter cold: lows of -10 to -5°F eliminate tender varieties and require careful rootstock selection. Spring frost arrives April 11, which is relatively late but still early enough to catch buds that break on warm March days. Fall frost comes October 31, giving gardeners a solid five-month window from mid-May through October for active growth.
What thrives in Chicago: apples, pears, peaches, European and Japanese plums, sour cherries, and American persimmons. These are region-proven crops. Tender stone fruits (nectarines, apricots) are riskier and require microclimate protection or trial-and-error variety selection.
Chicago's summer is the secondary challenge. Humidity creates ideal conditions for fungal diseases: apple scab, powdery mildew, and brown rot thrive. The alkaline clay soil common to the region also favors some diseases (like powdery mildew). Wind exposure in exposed locations stresses young trees and increases water loss. Combine cold winters, a medium growing season, and humid summers, and Chicago sits at the intersection where only the most resilient, disease-resistant varieties earn their place.
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 deceptive. Warm March weather can trick fruit buds into swelling, and a hard April freeze then kills the year's crop. This is especially damaging in years where March hits 70°F early, then April turns cold. Stone fruits (peaches, Japanese plums) are particularly vulnerable.
Humid summers enable fungal disease pressure. Apple scab and powdery mildew are endemic in Chicago, and brown rot affects stone fruits during the ripening window. Disease-susceptible varieties require frequent spraying to stay healthy; disease-resistant cultivars are non-negotiable for lower-maintenance gardens.
The alkaline clay soil of much of Chicago favors chlorosis (iron deficiency) in susceptible plants and creates drainage problems during wet springs. Poor drainage promotes root diseases and winter damage.
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
Frost protection in spring. The April 11 date can catch early buds. Plant fruit trees in a low spot or near a north-facing wall where they stay colder longer and break dormancy later, missing early warm snaps. Avoid the warm south slope if possible.
Disease-resistant varieties. Choose apple cultivars rated for scab resistance (there are many good ones). Select mildew-resistant pears. For stone fruits, pick cultivars with proven disease tolerance rather than the most tender, high-flavor options that require constant spraying.
Extend the fall season. October 31 is the first fall frost date, and it marks the deadline for warm-season crop maturation. Plant raspberries, blackberries, and cold-tolerant pear varieties that peak in September to October rather than July, capturing the extended harvest window.
Frequently asked questions
- Which fruit trees are the safest choice for a beginning gardener in Chicago?
Apples, pears, sour cherries, and American persimmons are the most forgiving. These tolerate the zone 6a winters without protection, and disease-resistant apple and pear cultivars are readily available from local nurseries. Peaches and sweet cherries work but require careful variety selection for winter hardiness.
- When is the last frost date in Chicago, and what does it mean for gardening?
April 11 is the statistical last spring frost. Fruit buds can break during warm March weather and then be killed by April cold. Plant fruit trees in cooler microclimates, and avoid tender varieties like some peaches except in sheltered south-facing locations.
- What's the biggest weather challenge for Chicago fruit growers?
Humid summers create fungal disease pressure, especially apple scab and powdery mildew. Disease-resistant apple and pear varieties are essential. Without them, frequent spraying is necessary or fungal damage will reduce fruit quality.
- Can I grow peaches in Chicago?
Yes, but with caution. Zone 6a winters kill many peach varieties. Select hardier cultivars bred for colder zones, or plant in a microclimate near a south-facing wall. The real risk is the April 11 frost date: buds break in March then die when April turns cold.
- When should I prune my fruit trees in Chicago?
Late winter (February or early March) is ideal, before buds break and before the last spring frost. Prune to remove winter-damaged wood and shape the canopy while dormant. Avoid fall pruning, which stimulates tender growth that won't survive the -10°F winters.
- How do I keep my fruit trees healthy during Chicago's humid summers?
Water deeply and consistently from June through August, especially during dry spells, to support tree health and reduce disease stress. Mulch around trees to conserve moisture and moderate soil temperature. Space trees for air circulation to minimize fungal disease.
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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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