When to plant sweet potato in Minneapolis

In Minneapolis, typical last spring frost is April 21 and typical first fall frost is October 24. Typical last spring frost: April 21. Sweet potato in Minneapolis is doable with planning outdoors. 110 suitable days are enough for fast varieties (85 days) but not slow ones (140 days).

Sweet potato

How to grow Sweet potato Minneapolis climate Weekly temperatures and windows

Where are you growing?

Tight fit

Tight fit in greenhouse

Tight fit in a cold frame

Sweet potato in Minneapolis is doable with planning outdoors. 110 suitable days are enough for fast varieties (85 days) but not slow ones (140 days).

When to plantMay 17 – May 30

Harvest: August 10 – October 11
Season vs crop: 110 grow days vs 85–140 needed
Typical frost (last spring – first fall): April 21 – October 24

Sweet potato in Minneapolis is doable with planning outdoors. 110 suitable days are enough for fast varieties (85 days) but not slow ones (140 days).

Start slips April 5 – April 18, then transplant May 17 – May 30 so the crop can finish outdoors.

Planting conditions

Suitable growing days in a row110

Days to harvest85–140 days from planting

No planting window is recorded for this place.

Too cold
Frost line

Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost (35 seasons (1991–2025)). Adjust a week or two for your conditions.

Planting and growing across the year

Planting is the sow / plant-out window. Growing is daytime air versus this plant’s ideal (21 – 32 °C70 – 90 °F21 – 32 °C (70 – 90 °F)) and tolerable (16 – 35 °C61 – 95 °F16 – 35 °C (61 – 95 °F)) ranges.

Ideal / plantable
Tolerable
Too cold
Too hot
Outside window

Planting uses sow / plant-out rules; growing shows daytime air against this plant’s ideal and tolerable ranges.

Key dates

Typical last spring frostApril 21

Low-risk last spring frostMay 3

Typical first fall frostOctober 24

Low-risk first fall frostOctober 11

Frost-free days185

Earliest indoor seed startApril 5

Latest indoor seed startApril 18

Transplant outdoorsMay 17 – May 30

Direct sow windownot recommended here

Suitable growing windowMay 17 – September 3 (110 days)

Expected harvestAugust 10 – October 11

How these dates are judged

Ideal conditions: Daytime air from 21 – 32 °C70 – 90 °F21 – 32 °C (70 – 90 °F).
Suitable conditions: Daytime air from 16 – 35 °C61 – 95 °F16 – 35 °C (61 – 95 °F).
Last frost and first frost: Typical spring and fall frost dates for Minneapolis, shown in the key dates.
Days to harvest: 85–140 days from planting, from typical days to harvest.
Sowing window: Dated sow and harvest bars use frost dates, soil minima, night limits, and last-sow count-back from typical crop timing. Air ratings on the weekly chart colour only weeks inside that same window — see weekly temperatures and windows.

Other plants for Minneapolis

Calculated by Plan & Plant. Method. Data 35 seasons (1991–2025).

Frost and suitability dates are typical figures from climate statistics.

Based on 35 years (1991–2025) of ERA5-Land data from Open-Meteo, for an area of about 10 km. Typical dates, not a guarantee.

Dates for Minneapolis use ERA5-Land cell 45.00, -93.30. How we calculated this · Algorithm 2026-10-season-10.

Report a problem