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When to plant sweet corn in Houston

How to grow Sweet cornHouston climate
Where are you growing?

Comfortable

Tight fit in greenhouse

Comfortable in a cold frame

Sweet corn in Houston is a good fit outdoors. The suitable growing window of 279 days covers the 60–90 days this plant usually needs.

When to plantFebruary 16 – September 16

Harvest
April 17 – November 21
Season vs crop
279 grow days vs 60–90 needed

Sweet corn in Houston is a good fit outdoors. The suitable growing window of 279 days covers the 60–90 days this plant usually needs.

Planting conditions

Sweet corn planting activities across the year: Direct sow, HarvestJFMAMJJASOND
  • Direct sow
  • Harvest
Local activity windows for this place and growing method. Blue fill is usually too cold for this plant.
Suitable growing days in a row279
Days to harvest60–90 days from seed
Feb 16 – Sep 16
Direct sow
Apr 17 – Nov 21
Harvest
ActivityWindowNotes
Direct sowFeb 16 – Sep 16Plant outdoors in this window.
HarvestApr 17 – Nov 21Expected harvest from typical days to harvest.
Blue fill is usually too cold for this plant. 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 (70 – 90 °F) and tolerable (55 – 95 °F) ranges.

Sweet corn planting and growing weeks in HoustonJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECPlantingGrowing
Planting uses sow / plant-out rules (frost, soil germination, night, and last-sow): green when plantable, blue diagonal when nights or soil are too cold, amber cross-hatch when too hot, faint for other calendar limits. Growing shows daytime air against this plant’s ideal and tolerable ranges across the year.

Key dates

Frost-free days365
Outdoor sow dateFebruary 16
Direct sow windowFebruary 16 – September 16
Suitable growing windowFebruary 16 – November 21 (279 days)
Expected harvestApril 17 – November 21

How these dates are judged

Ideal conditions
Daytime air from 70 – 90 °F.
Suitable conditions
Daytime air from 55 – 95 °F.
Last frost and first frost
Typical spring and fall frost dates for Houston, shown in the key dates.
Days to harvest
60–90 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. The year strip and weekly chart use the same window: air ratings only colour weeks inside it.

Growing window for Sweet corn: Feb 16 – Nov 21 (279 days)

Planting window for Sweet corn: Feb 16 – Sep 16 (213 days)

Usually too cold: Jan 1 – Feb 15; Nov 23 – Dec 31

Outdoors: weekly temperatures and windows

Temperatures across the year for Houston. Shaded bands are this plant’s ideal and tolerable daytime air ranges. Growing is daytime air suitability; Planting is sow / plant-out conditions (same colour language). Window brackets mark each stretch.

JanFebMarAprMayJunJulAugSepOctNovDec−20 °C−4 °F−10 °C14 °F0 °C32 °F10 °C50 °F20 °C68 °F30 °C86 °F40 °C104 °FTolerable 13–35 °CTolerable 55–95 °FIdeal 21–32 °CIdeal 70–90 °FWindowGrowingFeb 16 – Nov 21PlantingFeb 16 – Sep 16No typical frost here. Timing follows heat, not frost.
  • Ideal range
  • Tolerable range
  • Possible min to max
  • Average min to max
  • Suitable
  • Tolerable
  • Too cold
  • Too hot

Selected week · tap a week or use the arrows

Week 8 · Feb 16 – Feb 22

Average 45 to 62 °F · Possible 8 to 80 °F

Growing: too cold (inside window)

Planting: suitable

A week is in range when its average low and high sit inside the tolerance band 55 to 95 °F; it is suitable when that average range also overlaps the ideal 70 to 90 °F band and possible readings stay within 32 °F to 95 °F. Crossing a possible limit, or missing the ideal band, makes it tolerable; any chance of frost (possible low below 32 °F) makes it too cold. When a sowing window is calculated, weeks outside that window are uncoloured even if air is in range.

Based on average frost dates.

Show all 53 weeks
Cover method weekly charts

Outdoor weekly chart is above. Open a cover chart only if you grow under fleece, a cold frame, or an unheated greenhouse.

Other plants for Houston

Calculated by Plan & Plant · Method · Data 2019–2026

Frost and suitability dates are typical figures from climate statistics. Microclimates vary; they are not a guarantee.

How we calculated this
  • Data: ERA5-Land via Open-Meteo, cell 29.76, -95.37, years 2019–2026 (not a 30-year climate normal yet).
  • Typical and safer dates: Typical last frost is the date after which half of winters in this sample had no more frost; safer is later in the sample so fewer winters still frosted.
  • Crop rule: Local windows for Sweet corn from frost dates, temperature ratings, and crop timing rules.
  • Confidence: Provisional — short or thin sample for this place.
  • Full methodology (algorithm 2026-10-season-6).

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