Planting Date FinderZone, frost date, planting window

Planting calendar / Philadelphia, PA

Planting calendar for Philadelphia, PA

Station PHILA FRANKLIN INST, PA US (USC00366886) is 4.1 miles away. Median last 32°F 03/30, median first 32°F 11/17. Crop dates below come from Penn State Extension. Where the guide uses weeks around a frost date, those weeks are applied to the median 32°F dates because the guide does not name a 10/50/90 level.

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

Crops in the cited guide

SowSpinachStatewideAprilSowLeaf lettuceStatewidebeginning in April until around August 1SowCornStatewidebetween May 1 and July 1SowEarly cabbageStatewidemid-April to late MaySowEarly broccoliStatewideearly AprilSowEarly cauliflowerStatewideearly AprilSowTomatoesStatewidelate May to early JuneSowPeppersStatewidelate May to early JuneSowEggplantStatewidelate May to early JuneSowOnions (sets)Statewideearly to late April

Philadelphia, PA

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

Median last 32°F is March 30. Median first 32°F is November 17. The 50% growing-season length is 232 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%

Pennsylvania. Nearest qualified station: PHILA FRANKLIN INST, PA US (USC00366886), 4.1 miles. Median last 32°F March 30. Median first 32°F November 17. The 50% growing-season length is 232 days.

Open the ZIP page · Crop guides for Pennsylvania

32°F probabilities at this station
10%50%90%
Last 32°F on or afterApril 12March 30March 15
First 32°F on or beforeNovember 4November 17December 4

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.

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

Planting calendar

Windows below are from Penn State Extension, Starting Your Summer Vegetable Garden—Seeds or Transplants?, retrieved 2026-10-10. The page gives dates for much of Pennsylvania, not for named regions. Spinach is the crop placed in a named month, April, and that month is read as April 1 through April 30. Phrases such as “early April,” “mid-April to late May,” and “late May to early June” stay phrases, because the page does not give them a day. Crops the page times only as “after the danger of frost has passed” or “early spring,” with no month, are left off these windows.

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

State crop pages: Spinach · Leaf lettuce · Corn · Early cabbage · Early broccoli · Early cauliflower · Tomatoes · Peppers