Open Grow Guide

USDA Hardiness Zone 5

By Open Grow Guide Updated

Zone 5 at a glance

What zone 5 means

The number after a USDA zone tells you how cold an average winter gets, not how pleasant the whole year will be. Each zone marks a band for the average lowest temperature typical of that area in winter. Zone 5 sits toward the colder end of the national scale. A lower zone number always means a colder winter low, and a higher one means a milder one. Zone 5 does not tell you how hot the summers run, how much rain falls, or what the soil is like underfoot. Those three factors shape a garden just as much as winter cold. So treat the zone number as one piece of the picture, not the whole plan. This hub gathers the states that contain land mapped to zone 5. The list runs from Alaska to Arizona, and from Maine to Montana. Twenty-seven states appear here in total. Most of them also reach into warmer or colder zones elsewhere within their own borders. A single state can span several zones at once. Zone depends on elevation and distance from large bodies of water, not just on latitude. That is why a coastal valley and a nearby mountain pass can sit in different zones only a short drive apart. Each state page linked from here gives the frost dates and zone details specific to that state. Those numbers vary too much to state once for the whole group. Use the zone number to rule out plants that cannot survive your winter low. Then use your state's frost dates to time when you plant. The zone sets the floor a plant must tolerate. The frost dates set the calendar for your growing season.

Not sure which zone you are in? Look it up by ZIP code.

Open the zone finder

Frost and season length

Frost dates tell you when it turns safe to move tender plants outside, and when to bring them back in before fall. A zone 5 winter runs colder than most of the country. That means the frost-free stretch between spring's last cold snap and fall's first one tends to run shorter than it does in warmer zones. A short window matters most for plants that need many warm weeks to mature, like melons or long-season tomatoes. Exact frost dates differ from one state to the next, even within this group of states. Latitude, elevation, and nearby water all push those dates earlier or later. Check the frost dates on your own state's page rather than guessing from the zone number alone. Two zone 5 locations hundreds of miles apart can carry frost dates weeks apart from each other. Use the zone number as your guide to winter cold, and use the state page as your guide to the calendar.

What to grow in zone 5

Perennials

Trees

Planting in this zone

Picking plants for zone 5 means matching a plant's hardiness rating to this zone or a colder one. A tag or label that lists zone 5 or lower tells you the plant can survive this area's winter low. A plant rated only for zone 6 or warmer is not built for this winter, even if it grows well through summer. Many gardeners in this group of states also grow tender plants as annuals, or bring potted ones indoors before the first frost. That approach works around the zone limit instead of fighting it. The states on this list stretch from coastal Alaska to the high desert of Arizona. Soil and rainfall differ widely between them, even where the winter low lines up. Check your state's own page for the soil and rainfall notes that round out the zone number.

Neighbouring zones

How this page was made

  • Written with AI assistance from the sources listed on this page. AI is never the source of a fact.

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