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Can You Grow Brussels Sprouts in Idaho?

US · USDA Zone 6b · zones 3b, 4a, 4b, 5a, 5b, 6a, 6b

Grows well here

Brussels sprouts grow here with a long enough frost-free season — frost actually improves them.

Plant zones

3a–9a

Idaho last frost

mid-March

Idaho first frost

mid-November

Days to harvest

90–180 days

When to plant Brussels Sproutses in Idaho

Start indoors

Jan 17

Transplant

Mar 15

Harvest

Jun 13 – Sep 11

Dates are approximate, based on Idaho's average frost dates. Your exact yard may vary by microclimate.

About Brussels Sprouts

Brussels sprouts have a long season but reward patience — sprouts actually improve after a light frost.

Start indoors 8 weeks before last frost. Plant in the sunniest spot. Needs a long season — start early. Frost improves flavour. Stake in exposed positions against autumn winds.

Full brussels sprouts growing guide →

Gardening in Idaho

Idaho has a semi-arid continental climate. Southern valleys are Zone 6-7 with hot dry summers; northern regions and mountains are colder. Excellent for root vegetables and cool crops.

See what grows well in Idaho →

Frequently asked questions

Can you grow Brussels Sprouts in Idaho?

Brussels sprouts grow here with a long enough frost-free season — frost actually improves them.

What zone is Idaho?

Idaho spans USDA Zone 6b (3b, 4a, 4b, 5a, 5b, 6a, 6b).

When do you plant Brussels Sproutses in Idaho?

Plant Brussels Sproutses around mid-March (start indoors Jan 17), harvest Jun 13 – Sep 11.