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Can You Grow Sweet Potato in New Brunswick?

Canada · Canadian Zone 5 · zones 4, 5, 6

Grows well here

Sweet potatoes grow well here — they love the warm season your zone provides.

Plant zones

5a–11b

New Brunswick last frost

mid-April

New Brunswick first frost

mid-October

Days to harvest

90–120 days

When to plant Sweet Potatoes in New Brunswick

Direct sow

Apr 15

Harvest

Jul 14 – Aug 13

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

About Sweet Potato

Sweet potatoes need a long warm season and thrive in heat — they are a subtropical crop at heart.

Plant slips (rooted cuttings) after soil warms to 18°C. They sprawl — give them space or train vertically. Cure harvested tubers at 30°C for a week to develop sweetness and improve storage.

Full sweet potato growing guide →

Gardening in New Brunswick

New Brunswick has a maritime continental climate. The Saint John River Valley is Zone 5b-6a. Four distinct seasons with a productive 5-6 month growing season. Known for potatoes, blueberries, and fiddleheads.