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What to Plant in September in Delaware

Here's what you can plant in Delaware during September. Since Delaware spans multiple USDA zones, planting dates vary by location. Find your zone below.

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Zone 7b

View full Zone 7b planting guide for September

Harvest

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Last updated: May 2026.

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Every number on this page traces back to a primary horticulture or government data source. Click through to verify.

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