Purdue says planting dates differ by microclimatic effects including urban areas, natural terrain, moisture, sunlight, wind exposure, cloches, and mulches.
Regional guide
Indiana Frost and Soil Temperature Vegetable Garden
A Purdue Extension guide for Indiana frost-relative planting, soil-temperature thresholds, hardiness groups, fall timing, and succession planning.
Regional timing
Current regional planting plan
A Purdue Extension guide for Indiana frost-relative planting, soil-temperature thresholds, hardiness groups, fall timing, and succession planning.
Source-backed timing
Purdue Extension Indiana Vegetable Planting Calendar
Indiana Frost/Soil
4 climate signals
Source
source cues
Local
conditions
- Purdue Extension bases safe Indiana planting-date ranges on statistical last spring frost and first fall frost dates, not a single statewide calendar day.
- Purdue says planting dates differ by microclimatic effects including urban areas, natural terrain, moisture, sunlight, wind exposure, cloches, and mulches.
- Warm-season crops such as beans, tomatoes, squash, sweet potatoes, and sweet corn should be delayed until soil reaches at least 60F for optimum germination or growth.
- Catalog priority
- 32 priority crops 32 catalog examples
- Climate checks
- 4 climate signals 6 planning notes
- Timing basis
- Use regional source signals source guidance first
Provider Bush Bean, Detroit Dark Red Beet, Waltham 29 Broccoli, Long Island Improved Brussels Sprouts
Semi-hardy crops are planted 2-4 weeks before last spring frost; Purdue examples include beet, carrot, chard, cauliflower, celery, lettuce, and parsnip.
Calendar
Convert regional timing into dated sowing, transplant, and harvest jobs.
Frost dates
Keep hardiness zone context separate from local first and last frost dates.
All regions
Compare this guide with the broader regional atlas.
Central Ohio
OSU Extension central Ohio guide for normal-season direct-seeded rows, transplants, timing shifts, succession, and fall crops.
Climate signals
- Purdue Extension bases safe Indiana planting-date ranges on statistical last spring frost and first fall frost dates, not a single statewide calendar day.
- Purdue says planting dates differ by microclimatic effects including urban areas, natural terrain, moisture, sunlight, wind exposure, cloches, and mulches.
- Warm-season crops such as beans, tomatoes, squash, sweet potatoes, and sweet corn should be delayed until soil reaches at least 60F for optimum germination or growth.
- For fall planting dates, Purdue says to consider days to maturity, choose faster maturing cultivars when possible, and irrigate frequently until the crop is established.
Planning notes
- Hardy crops are planted 4-6 weeks before last spring frost; Purdue examples include broccoli, kale, peas, and spinach.
- Semi-hardy crops are planted 2-4 weeks before last spring frost; Purdue examples include beet, carrot, chard, cauliflower, celery, lettuce, and parsnip.
- Tender crops are planted after average last spring frost when minimum air temperature is 50F; Purdue examples include bean, tomato, and sweet corn.
- Very Tender crops are planted at least two weeks after average last spring frost when minimum air temperature is 60-65F; Purdue examples include cucumber, okra, pumpkin, eggplant, pepper, squash, and melons.
- For fall planting, Purdue lists cool-season plants at least 4-8 weeks before first fall frost; examples include beet, radish, broccoli, kale, spinach, Brussels sprouts, kohlrabi, turnip, cabbage, lettuce, collards, and mustard greens.
- Making several plantings within the safe date ranges can extend the harvest season over a longer period; if making only one planting, Purdue recommends the middle of the range.
Catalog crop examples
These catalog entries match crops covered by the regional timing source; variety-specific details remain tied to each seed entry's own source.
- Provider Bush Bean Vegetable · Warm · 50 days
- Detroit Dark Red Beet Vegetable · Cool · 58 days
- Waltham 29 Broccoli Vegetable · Cool · 74 days
- Long Island Improved Brussels Sprouts Vegetable · Cool · 100 days
- Golden Acre Cabbage Vegetable · Cool · 64 days
- Danvers 126 Carrot Vegetable · Shoulder · 70 days
- Snowball Y Cauliflower Vegetable · Cool · 70 days
- Tall Utah Celery Vegetable · Cool · 110 days
- Bright Lights Swiss Chard Vegetable · Shoulder · 55 days
- Georgia Southern Collards Vegetable · Cool · 65 days
- Golden Bantam Sweet Corn Vegetable · Warm · 80 days
- Marketmore 76 Cucumber Vegetable · Warm · 58 days
- Black Beauty Eggplant Vegetable · Warm · 80 days
- Lacinato Kale Vegetable · Cool · 60 days
- Early White Vienna Kohlrabi Vegetable · Cool · 55 days
- American Flag Leek Vegetable · Cool · 120 days
- Black Seeded Simpson Lettuce Vegetable · Cool · 45 days
- Hale's Best Jumbo Melon Vegetable · Warm · 85 days
- Southern Giant Curled Mustard Vegetable · Cool · 45 days
- Clemson Spineless Okra Vegetable · Warm · 56 days
- Evergreen Bunching Onion Vegetable · Shoulder · 65 days
- Hollow Crown Parsnip Vegetable · Cool · 120 days
- Sugar Snap Pea Vegetable · Cool · 62 days
- California Wonder Pepper Vegetable · Warm · 72 days
- Small Sugar Pumpkin Vegetable · Warm · 100 days
- French Breakfast Radish Vegetable · Cool · 28 days
- Bloomsdale Spinach Vegetable · Cool · 42 days
- Delicata Winter Squash Vegetable · Warm · 100 days
- Waltham Butternut Squash Vegetable · Warm · 95 days
- Roma Tomato Vegetable · Warm · 76 days
- Purple Top White Globe Turnip Vegetable · Cool · 55 days
- Sugar Baby Watermelon Vegetable · Warm · 80 days
Related regional guides
- Ohio Central Normal-Season Vegetable Garden OSU Extension central Ohio guide for normal-season direct-seeded rows, transplants, timing shifts, succession, and fall crops.
- Iowa Planting and Harvest Timing Vegetable Garden An Iowa State Extension guide for Iowa vegetable planting schedules, harvest timing, staggered chart use, and April-October planning.
- Kansas Expected Planting Calendar Vegetable Garden A K-State Research and Extension guide for Kansas planting windows, crop temperatures, frost resistance, spacing, and harvest timing.
- Kentucky Three-Region Vegetable Garden A University of Kentucky guide for Western, Central, and Eastern Kentucky vegetable planting dates, methods, and safe planting windows.
Source: Purdue Extension Indiana Vegetable Planting Calendar