Which frost date do the crop weeks use?

Weeks after the frost-free date use the median last 32°F date, April 1, when the guide does not name a probability. Weeks before the first freeze use the median first 32°F date, November 19. Both medians are 50% dates in the NOAA 1991–2020 normals for the station on this page. The page says when that anchor was used.

Where do the crop dates come from?

Crop dates come from the extension guide cited on this page, not from a second calendar invented here. The publisher and the title are printed with the source note. A month without a day is expanded to the first and last day of that month, and the page says so. A phrase without two dates stays a phrase.

Is this planting calendar a forecast?

No. The frost dates are 1991–2020 climate normals at the station 5.2 miles from the city point. The crop windows are the cited guide’s ranges, shifted only when that guide itself used weeks. A cold spring can still fall past the median. The National Weather Service forecast covers a particular night. This page does not.

Planting calendar for New York, NY

Direct answer. In New York, NY, the median last 32°F date at NY AVE V BROOKLYN, NY US (USC00305796) is April 1, and the median first 32°F date is November 19. The station is 5.2 miles from the city point. Crop windows come from Cornell University, Cornell Vegetables. Where that guide counts weeks from a frost date and does not name a 10%, 50%, or 90% level, those weeks are applied to these median dates.

Median last 32°F April 1. Median first 32°F November 19. Frost dates for New York.

A wall calendar surrounded by vegetables, herbs, seed packets, and watering cans.

Median last 32°F is April 1. Median first 32°F is November 19. The 50% growing-season length is 233 days. The green band runs from the median last frost to the median first frost. Thin ticks mark the 10%, 50%, and 90% dates.

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

Last 32°F in spring

NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.

Probability	Date	How to read it
90%	March 16	Earlier date. A last 32°F on or after this day is common.
50%	April 1	Median.
10%	April 12	Later date. A last 32°F on or after this day is uncommon.

First 32°F in fall

NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.

Probability	Date	How to read it
10%	November 6	Earlier date. A first 32°F on or before this day is uncommon.
50%	November 19	Median.
90%	December 5	Later date. A first 32°F on or before this day is common.

32°F growing-season length

Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.

Probability the season is at least this long	Days
10%	255
50%	233
90%	215

28°F threshold

	10%	50%	90%
Last, on or after	April 2	March 19	March 4
First, on or before	November 16	December 1	December 18
Season at least	276 days	255 days	234 days

36°F threshold

	10%	50%	90%
Last, on or after	April 25	April 10	March 30
First, on or before	October 25	November 6	November 22
Season at least	229 days	209 days	190 days

Station NY AVE V BROOKLYN, NY US (USC00305796). Completeness flag R, 16 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 6.1 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Questions

Which frost date do the crop weeks use?: Weeks after the frost-free date use the median last 32°F date, April 1, when the guide does not name a probability. Weeks before the first freeze use the median first 32°F date, November 19. Both medians are 50% dates in the NOAA 1991–2020 normals for the station on this page. The page says when that anchor was used.
Where do the crop dates come from?: Crop dates come from the extension guide cited on this page, not from a second calendar invented here. The publisher and the title are printed with the source note. A month without a day is expanded to the first and last day of that month, and the page says so. A phrase without two dates stays a phrase.
Is this planting calendar a forecast?: No. The frost dates are 1991–2020 climate normals at the station 5.2 miles from the city point. The crop windows are the cited guide’s ranges, shifted only when that guide itself used weeks. A cold spring can still fall past the median. The National Weather Service forecast covers a particular night. This page does not.

Crops in the cited guide

SowBeansUpstateMay 10–Jul 15 SowBeetsUpstateApr 25–Jul 25 SowBroccoliUpstateApr 15–May 15 · Jul 20–Aug 10 SowCabbageUpstateMay 1–Jul 5 SowCarrotsUpstateApr 15–Jul 25 SowSwiss chardUpstateApr 15–Jul 31 SowSweet cornUpstateMay 25–Jun 20 SowCucumberUpstateMay 25–Jul 5 SowEggplantUpstateJun 1–Jun 20 SowLettuce (leaf)UpstateApr 10–May 10 · Jul 30–Aug 20 SowOnions (bulb)UpstateApr 15–Jun 10 SowOnions (green)UpstateApr 15–Jul 10 SowPeasUpstateApr 1–May 20 SowPeppers (Bell)UpstateMay 30–Jun 20 SowPotatoes, whiteUpstateMay 1–Jun 15 SowPumpkinUpstateMay 25–Jun 20 SowRadishUpstateApr 10–May 30 · Aug 1–Sep 15 SowSpinachUpstateApr 1–May 20 · Aug 1–Sep 15 SowSquash (summer)UpstateMay 25–Jul 15 · May 25–Jun 20 SowTomatoUpstateMay 25–Jun 20 SowTurnip (roots)UpstateApr 25–Jul 25 SowWatermelonUpstateJun 5–Jun 20

New York, NY

Zone 7bAverage annual extreme minimum 5°F to 10°F

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

New York. Nearest qualified station: NY AVE V BROOKLYN, NY US (USC00305796), 5.2 miles. Median last 32°F April 1. Median first 32°F November 19. The 50% growing-season length is 233 days.

Open the ZIP page · Crop guides for New York

32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	April 12	April 1	March 16
First 32°F on or before	November 6	November 19	December 5

Column order matches the NCEI file: for the last freeze, 10% is the later date and 90% is the earlier date. How to read the probabilities.

Planting calendar

Windows below are from Cornell University, Cornell Vegetables, Vegetable planting dates for Upstate New York, retrieved 2026-10-10. It’s based on areas with last spring frost around May 20 and first fall frost around October 1. Dates below are the outdoor ranges printed in that table, not a conversion into weeks before frost.

Crop

Date checks use your device’s calendar and appear after the page loads.

State crop pages: Beans · Beets · Broccoli · Cabbage · Carrots · Swiss chard · Sweet corn · Cucumber