Indianapolis Frost Dates: Key Planting Insights
Indianapolis, located in USDA Zones 6b–7a, experiences its typical last spring frost around April 20 and its first fall frost around October 20. These dates are crucial for planning both cool-season and warm-season crops. Cool-season vegetables like broccoli, lettuce, and radishes thrive from fall through early spring, while warm-season crops benefit from the warming soil in spring. The planting calendar provides guidance on when to start seeds indoors, transplant seedlings, and direct sow crops for optimal growth in the Indianapolis area (Urban Farmer, 2026).