When to plant sweet potato in Riverside

In Riverside, typical last spring frost is February 5 and typical first fall frost is December 19. Typical last spring frost: February 5. Sweet potato in Riverside is a good fit outdoors. The suitable growing window of 161 days covers the 85–140 days this plant usually needs.

Sweet potato

How to grow Sweet potato Riverside climate Weekly temperatures and windows

Where are you growing?

Comfortable

Tight fit in greenhouse

Comfortable in a cold frame

Sweet potato in Riverside is a good fit outdoors. The suitable growing window of 161 days covers the 85–140 days this plant usually needs.

When to plantApril 19 – June 13

Harvest: July 13 – October 31
Season vs crop: 161 grow days vs 85–140 needed
Typical frost (last spring – first fall): February 5 – December 19

Sweet potato in Riverside is a good fit outdoors. The suitable growing window of 161 days covers the 85–140 days this plant usually needs.

Planting conditions

Suitable growing days in a row161

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 frostFebruary 5

Low-risk last spring frostFebruary 28

Typical first fall frostDecember 19

Low-risk first fall frostNovember 30

Frost-free days316

Earliest indoor seed startMarch 8

Latest indoor seed startMay 2

Transplant outdoorsApril 19 – June 13

Direct sow windownot recommended here

Suitable growing windowApril 19 – September 26 (161 days)

Expected harvestJuly 13 – October 31

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 Riverside, 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 Riverside

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 Riverside use ERA5-Land cell 33.95, -117.40. How we calculated this · Algorithm 2026-10-season-10.

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