When to plant Radish in Valley County, ID
Spring Radish in Valley County goes in June 4–June 25, once nighttime temps stop dipping near freezing. A second sowing from June 25 to July 9 extends the harvest into fall.
When to Plant Radish in Valley County, ID
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.
Valley County, Idaho is in USDA Zone 5a. The average last spring frost is June 18 and the first fall frost is September 3, giving you a growing season of approximately 77 days.
At an elevation of 7,884 feet, Valley County receives approximately 17.8 inches of rainfall annually with predominantly loam soil. Summer highs average 83°F, so choose short-season varieties of Radish to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Radish successfully. Mulch heavily to conserve soil moisture.
Valley County Soil Profile
Soil Type
Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Radish Planting Timeline — Valley County, ID
Radish Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | June 4 | Jun 4 – Jun 25 |
| Harvest | July 2 | Jul 2 – Jul 23 |
| Fall Sowing | June 25 | Jun 25 – Jul 9 |
Plant 0.5" deep · 2" apart · Rows 6" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | — |
| June | Direct Sow Fall Sowing |
| July | Fall Sowing Harvest |
| August | — |
| 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 5a
📆 Growing Season
77 days in Valley County
Growing Tips for Valley 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 Valley County, ID?
Valley County is in Zone 5a with an average last frost of June 18. Plan your Radish planting based on this frost date — see the calendar above for exact timing.
What planting zone is Valley County, ID?
Valley County, Idaho is in USDA Hardiness Zone 5a. The average last spring frost is June 18 and first fall frost is September 3.
When should I plant Radish in Valley County, ID?
In Valley County, ID, plant Radish after the last frost (around June 18) and before the first frost (around September 3). Best results when soil holds above 50°F.
What growing zone is Valley County, ID for Radish?
Valley County sits in USDA Zone 5a. Radish grows reliably in zones 2a through 11b, so it's a good fit here.
Can Radish grow in Valley County's climate?
Yes — Radish grows well in Valley County's temperate climate. Valley County averages a 77-day frost-free season, with last frost around June 18 and first frost around September 3.
Your Valley County Garden Planner — Free
A 22-page printable planner built for Valley County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.