When to Plant Radish in Allen County, IN
Radishes are one of the fastest-growing vegetables, with some varieties ready in under a month. They come in round, elongated, and large winter types.
Allen County, Indiana is in USDA Zone 5b. The average last spring frost is April 25 and the first fall frost is October 21, giving you a growing season of approximately 179 days.
At an elevation of 721 feet, Allen County receives approximately 38.3 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Radish during the growing season.
Allen County Soil Profile
Soil Type
Silt Loam
Soil pH
6-7
Drainage
Well Drained
Monthly Watering Guide for Radish
Radish needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Radish Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.6" | 0" | ❄️ Dormant |
| Feb | — | 1.6" | 0" | ❄️ Dormant |
| Mar | — | 2.5" | 0" | ❄️ Dormant |
| Apr | 4.3" | 3.4" | 0.9" | 💧 Light watering |
| May | 4.3" | 4" | 0.3" | 💧 Light watering |
| Jun | 4.3" | 4.9" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 4.1" | 0.2" | 💧 Light watering |
| Aug | 4.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 3.8" | 0.5" | 💧 Light watering |
| Oct | 4.3" | 2.8" | 1.5" | 💧 Light watering |
| Nov | — | 2.9" | 0" | ❄️ Dormant |
| Dec | — | 2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Allen County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Radish Planting Timeline — Allen County, IN
Radish Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | April 11 | Apr 11 – May 2 |
| Harvest | May 9 | May 9 – May 30 |
| Fall Sowing | August 12 | Aug 12 – Aug 26 |
Plant 0.5" deep · 2" apart · Rows 6" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Direct Sow |
| May | Direct Sow Harvest |
| June | — |
| July | — |
| August | Fall Sowing |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
22–35 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 5b
📆 Growing Season
179 days in Allen County
Growing Tips for Allen County
Direct sow every 1-2 weeks for continuous harvest. Do not transplant. Harvest spring radishes promptly to prevent them from becoming pithy and hot.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Radish in Other Locations
Frequently Asked Questions
When should I plant Radish in Allen County, IN?
Allen County is in Zone 5b with an average last frost of April 25. Plan your Radish planting based on this frost date — see the calendar above for exact timing.
What planting zone is Allen County, IN?
Allen County, Indiana is in USDA Hardiness Zone 5b. The average last spring frost is April 25 and first fall frost is October 21.
Plan Your Garden with Confidence
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