# Is Chicago Zone 5 or 6? Understanding Chicago’s Planting Zone
Knowing your USDA hardiness zone is key to successful gardening in Chicago. This article explains whether Chicago is in Zone 5 or 6, why it matters, and how to garden accordingly.
## Chicago’s Planting Zone
– Most of Chicago is in USDA Zone 6a (minimum winter temps -10°F to -5°F)
– Some suburbs and outlying areas are in Zone 5b (-15°F to -10°F)
– Microclimates near Lake Michigan may be slightly warmer
## Why Zones Matter
– Helps select plants that can survive winter
– Guides planting and harvest times
– Reduces risk of plant loss from cold
## Gardening Tips for Chicago
– Choose cold-hardy varieties
– Start seeds indoors before the last frost (mid-May)
– Use mulch to protect roots and conserve moisture
## Conclusion
Chicago is primarily in Zone 6a, but check your local zip code for the most accurate zone. Selecting the right plants for your zone ensures a thriving, resilient garden.
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