Growli

USDA hardiness zone

Zone 6-10 to 0°F

Southern Pennsylvania, Ohio, Missouri, parts of mid-Atlantic · 180-day growing season

What grows in Zone 6

Zone 6 suits the following plants based on temperature tolerance and growing-season length:

Climate notes for Zone 6

Two-season growing — cool-season crops in spring/fall, warm-season in summer. Heirloom tomato varieties work well here.

Frost dates and timing

Average last spring frostmid- to late April
Average first fall frostmid- to late October
Growing season length~180 days
Temperature range (F)-10 to 0°F
Temperature range (C)-23 to -18°C

These are zone-wide averages. Local microclimates (south-facing slopes, urban heat, lakeside warmth) can shift dates by 1-2 weeks within the same zone.

Source and methodology

Temperature ranges from the USDA Plant Hardiness Zone Map (2023). Frost-date averages from NOAA Climate Data Online national averages within each zone. Plant recommendations curated by the Growli editorial team from US extension service references.

What to plant in Zone 6

Crop-by-crop sowing, transplant, and harvest dates for zone 6:

Common questions

What can I plant in USDA Zone 6?

Zone 6 suits Tomatoes (all types), Peppers, eggplant, Squash, melons, cucumbers, Beans, peas, Sweet corn, Apples, pears, peaches, plums, and more, based on its 180-day growing season and -10 to 0°F average minimum temperatures.

When is the last frost in Zone 6?

The average last spring frost in Zone 6 passes around mid- to late April, and the first fall frost arrives around mid- to late October. Wait until after the last frost date before planting tender crops outdoors.

How long is the growing season in Zone 6?

Zone 6 has roughly 180 frost-free growing days between the average last spring frost (mid- to late April) and the first fall frost (mid- to late October).

What is the temperature range of USDA Zone 6?

USDA Zone 6 is defined by average annual minimum temperatures of -10 to 0°F (-23 to -18°C).

When can I start planting in Zone 6?

Hardy cool-season crops can go outdoors a few weeks before the last frost (mid- to late April); tender crops should wait until 1–2 weeks after it. Start warm-season seeds indoors about 6–8 weeks before mid- to late April.

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