When to plant Onion in Vanderburgh County, IN
Plant Onion in Vanderburgh County, when soil hits 50°F — usually March 24. Continue planting through April 14 for the spring crop. A second sowing from August 20 to September 3 extends the harvest into fall.
When to Plant Onion in Vanderburgh County, IN
Onions are a fundamental kitchen staple available in yellow, white, and red varieties. Choose long-day, short-day, or intermediate types based on your latitude.
Vanderburgh County, Indiana is in USDA Zone 7a. The average last spring frost is April 7 and the first fall frost is October 29, giving you a growing season of approximately 205 days.
At an elevation of 901 feet, Vanderburgh County receives approximately 40.3 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Onion during the growing season.
Vanderburgh County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Onion Planting Timeline — Vanderburgh County, IN
Onion Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 3 | Mar 3 – Mar 17 |
| Transplant Outdoors | April 7 | Apr 7 – Apr 21 |
| Direct Sow | March 24 | Mar 24 – Apr 14 |
| Harvest | July 7 | Jul 7 – Aug 25 |
| Fall Sowing | August 20 | Aug 20 – Sep 3 |
Plant 1" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | — |
| June | — |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
90–120 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 7a
📆 Growing Season
205 days in Vanderburgh County
Growing Tips for Vanderburgh County
Start seeds indoors 8-10 weeks before transplanting. Match day-length type to your latitude. Stop watering when tops begin to fall over and cure bulbs for 2-3 weeks before storage.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Onion in Other Locations
Frequently Asked Questions
When should I plant Onion in Vanderburgh County, IN?
Vanderburgh County is in Zone 7a with an average last frost of April 7. Plan your Onion planting based on this frost date — see the calendar above for exact timing.
What planting zone is Vanderburgh County, IN?
Vanderburgh County, Indiana is in USDA Hardiness Zone 7a. The average last spring frost is April 7 and first fall frost is October 29.
When should I plant Onion in Vanderburgh County, IN?
In Vanderburgh County, IN, plant Onion after the last frost (around April 7) and before the first frost (around October 29). Best results when soil holds above 50°F.
What growing zone is Vanderburgh County, IN for Onion?
Vanderburgh County sits in USDA Zone 7a. Onion grows reliably in zones 3a through 10b, so it's a good fit here.
Can Onion grow in Vanderburgh County's climate?
Yes — Onion grows well in Vanderburgh County's temperate climate. Vanderburgh County averages a 205-day frost-free season, with last frost around April 7 and first frost around October 29.
Your Vanderburgh County Garden Planner — Free
A 22-page printable planner built for Vanderburgh County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.