When to plant broccoli in Atlanta

Where are you growing?

Comfortable

Tight fit in greenhouse

Comfortable in a cold frame

Broccoli in Atlanta is a good fit outdoors. The suitable growing window of 130 days covers the 55–75 days this plant usually needs.

Start indoors: November 29 – January 23
Transplant outside: January 17 – March 13
Harvest: March 13 – May 27
Season vs crop: 130 grow days vs 55–75 needed
Typical frost (last spring – first fall): February 28 – December 1

Broccoli in Atlanta is a good fit outdoors. The suitable growing window of 130 days covers the 55–75 days this plant usually needs.

Planting conditions

Start indoors
Harden off
Transplant outside
Grow outdoors
Harvest

Local activity windows for this place and growing method. Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost.

Suitable growing days in a row130

Days to harvest55–75 days from transplant

Nov 29 – Jan 23

Start indoors

Jan 10 – Jan 16

Harden off

January 17

Transplant outside

Jan 18 – Mar 12

Grow outdoors

Mar 13 – May 27

Harvest

Activity	Window	Notes
Start indoors	Nov 29 – Jan 23	Sow indoors before the outdoor window.
Harden off	Jan 10 – Jan 16	Acclimate seedlings outdoors before planting.
Transplant outside	January 17	Move plants outside on this day (start of the plant-out window).
Grow outdoors	Jan 18 – Mar 12	Plants grow outdoors until harvest.
Harvest	Mar 13 – May 27	Expected harvest from typical days to harvest.

Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost. 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 (59 – 75 °F) and tolerable (39 – 81 °F) ranges.

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

Typical last spring frostFebruary 28

Safer last spring frostFebruary 28

Typical first fall frostDecember 1

Safer first fall frostDecember 1

Frost-free days275

Earliest indoor seed startNovember 29

Latest indoor seed startJanuary 23

Transplant outdoorsJanuary 17 – March 13

Direct sow windownot recommended here

Suitable growing windowJanuary 17 – May 26 (130 days)

Expected harvestMarch 13 – May 27

How these dates are judged

Ideal conditions: Daytime air from 59 – 75 °F.
Suitable conditions: Daytime air from 39 – 81 °F.
Last frost and first frost: Typical spring and fall frost dates for Atlanta, shown in the key dates.
Days to harvest: 55–75 days from transplant, 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 Broccoli: Jan 17 – May 26 (130 days)

Planting window for Broccoli: Jan 17 – Mar 13 (56 days)

Usually too cold: Nov 30 – Dec 6; Dec 14 – Dec 27

Outdoors: weekly temperatures and windows

Temperatures across the year for Atlanta. 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.

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 3 · Jan 12 – Jan 18

Average 36 to 53 °F · Possible 18 to 69 °F

Growing: too cold

Planting: not sowable

A week is in range when its average low and high sit inside the tolerance band 39 to 81 °F; it is suitable when that average range also overlaps the ideal 59 to 75 °F band and possible readings stay within 39 °F to 81 °F. Crossing a possible limit, or missing the ideal band, makes it tolerable; a possible low below 39 °F makes it tolerable. 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 Atlanta

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 33.70, -84.40, 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 Broccoli 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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