When to plant parsley in Houston

In Houston, typical last spring frost is January 23 and typical first fall frost is December 29. Typical last spring frost: January 23. Parsley in Houston is a good fit outdoors. The suitable growing window of 83 days covers the 70–80 days this plant usually needs.

Parsley

How to grow Parsley Houston climate Weekly temperatures and windows

Where are you growing?

Comfortable

Tight fit in greenhouse

Comfortable in a cold frame

Parsley in Houston is a good fit outdoors. The suitable growing window of 83 days covers the 70–80 days this plant usually needs.

When to plantFebruary 4 – March 31

Harvest: April 15 – June 19
Season vs crop: 83 grow days vs 70–80 needed
Typical frost (last spring – first fall): January 23 – December 29

Parsley in Houston is a good fit outdoors. The suitable growing window of 83 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 row83

Days to harvest70–80 days from seed

Feb 4 – Mar 31

Direct sow

Apr 1 – Apr 14

Grow outdoors

Apr 15 – Jun 19

Harvest

Activity	Window	Notes
Direct sow	Feb 4 – Mar 31	Plant outdoors in this window.
Grow outdoors	Apr 1 – Apr 14	Plants grow outdoors until harvest.
Harvest	Apr 15 – Jun 19	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 frostJanuary 23

Low-risk last spring frostMarch 4

Typical first fall frostDecember 29

Low-risk first fall frostDecember 4

Frost-free days339

Outdoor sow dateFebruary 4

Direct sow windowFebruary 4 – March 31

Suitable growing windowFebruary 4 – April 27 (83 days)

Expected harvestApril 15 – June 19

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 Houston, 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 Houston

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 Houston use ERA5-Land cell 29.76, -95.37. How we calculated this · Algorithm 2026-10-season-10.

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