Growli

USDA hardiness zone

Zone 4-30 to -20°F

Northern Maine, northern Wisconsin, Montana, parts of New England · 125-day growing season

What grows in Zone 4

Zone 4 suits the following plants based on temperature tolerance and growing-season length:

Climate notes for Zone 4

Tomatoes and peppers benefit from row covers in early season. Mulch heavily over winter for perennials and garlic.

Frost dates and timing

Average last spring frostmid-May
Average first fall frostmid-September
Growing season length~125 days
Temperature range (F)-30 to -20°F
Temperature range (C)-34 to -29°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 4

Crop-by-crop sowing, transplant, and harvest dates for zone 4:

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