When to plant parsley 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. Parsley in Riverside is a good fit outdoors. The suitable growing window of 123 days covers the 70–80 days this plant usually needs.

Parsley

How to grow Parsley Riverside climate Weekly temperatures and windows

Where are you growing?

Comfortable

Comfortable in greenhouse

Comfortable in a cold frame

Parsley in Riverside is a good fit outdoors. The suitable growing window of 123 days covers the 70–80 days this plant usually needs.

When to plantJanuary 31 – March 27

Harvest: April 11 – June 15
Season vs crop: 123 grow days vs 70–80 needed
Typical frost (last spring – first fall): February 5 – December 19

Parsley in Riverside is a good fit outdoors. The suitable growing window of 123 days covers the 70–80 days this plant usually needs.

Planting conditions

Direct sow
Grow outdoors
Harvest

Local activity windows for this place and growing method. Dashed lines are typical last and first frost.

Suitable growing days in a row123

Days to harvest70–80 days from seed

Jan 31 – Mar 27

Direct sow

Mar 28 – Apr 10

Grow outdoors

Apr 11 – Jun 15

Harvest

Activity	Window	Notes
Direct sow	Jan 31 – Mar 27	Plant outdoors in this window.
Grow outdoors	Mar 28 – Apr 10	Plants grow outdoors until harvest.
Harvest	Apr 11 – Jun 15	Expected harvest from typical days to harvest.

Direct sow
Grow outdoors
Harvest

Based on average frost dates (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 (15 – 21 °C59 – 70 °F15 – 21 °C (59 – 70 °F)) and tolerable (4 – 27 °C39 – 81 °F4 – 27 °C (39 – 81 °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

Outdoor sow dateJanuary 31

Direct sow windowJanuary 31 – March 27

Suitable growing windowJanuary 31 – June 2 (123 days)

Expected harvestApril 11 – June 15

How these dates are judged

Ideal conditions: Daytime air from 15 – 21 °C59 – 70 °F15 – 21 °C (59 – 70 °F).
Suitable conditions: Daytime air from 4 – 27 °C39 – 81 °F4 – 27 °C (39 – 81 °F).
Last frost and first frost: Typical spring and fall frost dates for Riverside, shown in the key dates.
Days to harvest: 70–80 days from seed, 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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