United States Edition

USDA Hardiness Zone 3b

Zone 3b is a zone in the USDA Hardiness climate zone rating system. The USDA Hardiness system can be useful to gardeners in establishing if certain plants are suitable for your garden's microclimate and was originally devised by the US department of agriculture. There are currently 228 gardens being tracked on Folia that are in USDA Zone 3b.

Some popular plants that tend to grow very well in this zone include Chili pepper, Tomato, Sweet pepper, Carrot, Bean, Potato, Broccoli, Lettuce, Sunflower and Winter squash.

Some locations recently identified as being in this zone include Laurentians (Canada), Lethbridge (Canada), Cold Lake (Canada), Jericho, VT (United States), Edmonton (Canada), Eau Claire (United States), Ottawa (Canada), Ottawa (Canada), Lethbridge (Canada), mount Washington (United States), (Canada), Altona (Canada), Edmonton (Canada), Hinesburg (United States), Edmonton (Canada), Bozeman, MT (United States), Palmer, Alaska (United States), Atlanta (United States), Rexburg, Idaho (United States), san diego (United States), (Singapore), San Francisco (United States), Edmonton (Canada), Stanchfield, MN (United States), Driggs (United States), Tomahawk, WI (United States), Winnipeg (Canada), Alberton (Canada), Calgary (Canada) and Hays, Alberta (Canada).

If you are in 3b, lowest temperatures in your garden should be around -37°C [-35°F] to -34°C [-29°F].

The corresponding Sunset zone for 3b is approx. A1.

Hello, new zone 3b gardeners! View all


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New gardens in zone 3b View all

  • GeorgeSr's 14 x 36 x 54 four shelf rack garden

    14 x 36 x 54 four shelf rack garden

    Zone 3b Menards had these on sale for black Friday for $19.95. Bought one and setup it up in the south facing bedroom window.

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  • GeorgeSr's Storage Bin Inoculating garden

    Storage Bin Inoculating garden

    Zone 3b Using a tan colored Rubbermaid Roughneck Storage Bin to mix the potting mix and inoculant. Emptied two sandbags into the bin. Added 1/2 gallon i...

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    • 1
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  • GeorgeSr's Tiny Trailer Trammel garden

    Tiny Trailer Trammel garden

    Zone 3b The tiny trailer is used for the compost sifting "trammel". We also will be using the trailer to mix the compost with the biochar and leaf mulch. S...

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  • GeorgeSr's 18 gallon Rubbermaid Roughneck storage bin garden

    18 gallon Rubbermaid Roughneck storage bin garden

    Zone 3b Using a 18 gallon Rubbermaid Roughneck storage bin to inoculate the biochar. The plan is to use the biochar that's been sifted first through the 1/...

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  • GeorgeSr's Crushing & Sifting  garden

    Crushing & Sifting garden

    Zone 3b This garden will be used to create a record of our biochar crushing and sifting operation. Decided to crush the biochar by running over it with t...

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Popular plants for zone 3b gardens

More USDA Zones Map


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