Indiana planting calendar

When to put transplants or seed in the ground across Indiana, worked out from the average last spring and first fall frost for each USDA zone in the state, and what to line up before you commit ground. Written for farms that sell what they grow.

Your zone in Indiana: frost dates

Zones 5b–6b run through Indiana. Frost dates are long-term averages for planning, not a forecast for your field.

  • Zone 5b
    South Bend and the northern counties
    Last frost
    ~May 1
    First frost
    ~October 6
    Frost-free days
    158
    Winter low
    -15°F to -10°F
  • Zone 6a
    Indianapolis and central Indiana
    Last frost
    ~May 1
    First frost
    ~October 1
    Frost-free days
    153
    Winter low
    -10°F to -5°F
  • Zone 6b
    Evansville and the Ohio River valley
    Last frost
    ~April 24
    First frost
    ~October 8
    Frost-free days
    167
    Winter low
    -5°F to 0°F

What it costs to grow an acre in Indiana

No published Indiana budget is transcribed here yet, so this page shows planting dates only — we do not publish cost figures we cannot source. Neighboring state budgets from NC State, UGA and UF/IFAS are on the crop profitability page.

Every figure is transcribed from a published land-grant enterprise budget for that state. These are planning budgets built from grower panels and dealer quotes, not surveys of what farms actually spent — your invoices override them everywhere they exist.

When to plant Indiana's main crops

Calculated for Zone 6a (Indianapolis and central Indiana). Pick your own zone on the crop page.

What zone is my farm?

  • South BendZone 5b
  • IndianapolisZone 6a
  • EvansvilleZone 6b

If your farm sits in a zone that is not listed here, start from the calendar index and pick the closest match, then confirm with your county extension office.

Before you commit ground

A planting date tells you when a crop can grow — not whether it pays. Work out your breakeven price, then line up who is buying before you plant.

Indiana planting and cost questions

What USDA planting zone is South Bend, Indiana?
The calendar carries South Bend in Zone 5b. Average last spring frost is around May 1 and average first fall frost around October 6, which is about 158 frost-free days.
What USDA planting zone is Indianapolis, Indiana?
The calendar carries Indianapolis in Zone 6a. Average last spring frost is around May 1 and average first fall frost around October 1, which is about 153 frost-free days.
When should I plant tomatoes in Indiana?
In Zone 6a (Indianapolis and central Indiana), May 8 – May 29 july 29 – august 26

Other state pages

Dates are calculated from average first and last frost dates for each zone. Your microclimate, elevation and soil temperature can shift any window by a week or more — treat these as starting points and keep your own records.