When to plant Daikon in Dubuque County, IA
Dubuque County gardeners should plant Daikon between April 15 and May 6 in spring. With Dubuque County's Zone 5a climate (last frost April 29), Daikon needs 50–70 days to mature — plant by July 31 for a full harvest. A second sowing from July 31 to August 14 extends the harvest into fall.
When to Plant Daikon in Dubuque County, IA
Daikon is a large, mild Japanese radish that can grow over a foot long. It is excellent for pickling, stir-fries, and as a soil-breaking cover crop.
Dubuque County, Iowa is in USDA Zone 5a. The average last spring frost is April 29 and the first fall frost is October 9, giving you a growing season of approximately 163 days.
At an elevation of 1,243 feet, Dubuque County receives approximately 36.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Daikon to ensure they mature before fall.
Dubuque County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Daikon Planting Timeline — Dubuque County, IA
Daikon Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | April 15 | Apr 15 – May 6 |
| Harvest | June 10 | Jun 10 – Jul 8 |
| Fall Sowing | July 31 | Jul 31 – Aug 14 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Direct Sow |
| May | Direct Sow |
| June | Harvest |
| July | Fall Sowing Harvest |
| August | Fall Sowing |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
50–70 days
🧪 Soil pH
Needs 5.8–7 · Your soil: N/A
🗺️ USDA Zone
Zone 5a
📆 Growing Season
163 days in Dubuque County
Growing Tips for Dubuque County
Direct sow in late summer for fall harvest. Loosen soil deeply before planting. Thin seedlings to 6 inches apart. Harvest before hard freeze as exposed shoulders may crack.
Companion Planting
Good Companions
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Daikon in Other Locations
Frequently Asked Questions
When should I plant Daikon in Dubuque County, IA?
Dubuque County is in Zone 5a with an average last frost of April 29. Plan your Daikon planting based on this frost date — see the calendar above for exact timing.
What planting zone is Dubuque County, IA?
Dubuque County, Iowa is in USDA Hardiness Zone 5a. The average last spring frost is April 29 and first fall frost is October 9.
When should I plant Daikon in Dubuque County, IA?
In Dubuque County, IA, plant Daikon after the last frost (around April 29) and before the first frost (around October 9). Best results when soil holds above 50°F.
What growing zone is Dubuque County, IA for Daikon?
Dubuque County sits in USDA Zone 5a. Daikon grows reliably in zones 2a through 11b, so it's a good fit here.
Can Daikon grow in Dubuque County's climate?
Yes — Daikon grows well in Dubuque County's temperate climate. Dubuque County averages a 163-day frost-free season, with last frost around April 29 and first frost around October 9.
Your Dubuque County Garden Planner — Free
A 22-page printable planner built for Dubuque 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.