When to plant in Zion, PA

Planting dates worked out from Zion's own frost records, not a generic zone chart.

Safe to plant out

May 23

1 year in 10 has a later frost

Average last frost

May 13

about a 50% chance of a later one

Average first fall frost

Oct 5

1 year in 10 by Sep 19

Frost-free days

144

median, 1991–2020

Station used: Millheim · 17.9 km away · station 341 m, town 309 m. How we match towns to stations

This season

Plan your garden.

Crop	Start indoors	Plant out or sow	Harvest from
Tomato	Mar 28 – Apr 11	May 23 – Jun 6	Jul 17
Sweet pepper	Mar 14 – Mar 28	May 23 – Jun 6	Jul 22
Lettuce (leaf)	Mar 11 – Mar 18	Apr 15 – Apr 29	May 25
Peas	—	Apr 5 – May 3	May 30
Bush beans	—	May 16 – Jun 6	Jul 5
Carrot	—	Apr 22 – Jun 3	Jun 21
Beet	—	Apr 15 – May 27	Jun 4
Potato	—	Apr 22 – May 13	Jul 1
Kale	Mar 4 – Mar 18	Apr 15 – Apr 29	May 28
Broccoli	Mar 4 – Mar 18	Apr 15 – May 6	Jun 14
Cucumber	Apr 25 – May 2	May 23 – Jun 6	Jul 12
Summer squash and zucchini	Apr 25 – May 2	May 23 – Jun 6	Jul 7
Winter squash	Apr 25 – May 2	May 23 – Jun 6	Aug 11
Sweet corn	—	May 16 – Jun 6	Jul 15
Onion (from sets)	—	Apr 15 – May 6	Jul 14
Garlic	—	Sep 21 – Oct 19 (fall)	following summer
Spinach	—	Apr 5 – May 3	May 13
Basil	Apr 11 – Apr 25	May 23 – Jun 6	Jul 19

How the growing season has shifted here, year by year, from the station's own records.

Each year's last spring frostLong-term trend

See the data as a table

Each year's frost-free daysLong-term trend

See the data as a table

Each year's average temperature, April to SeptemberLong-term trend

See the data as a table

What this means for you: This station's record is too short to show a reliable trend yet.

Source: daily records from Millheim (NOAA GHCN-Daily). Years with too many missing days are left out.