When to Plant Radish in Fairfield County, CT
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.
Fairfield County, Connecticut is in USDA Zone 7a. The average last spring frost is April 9 and the first fall frost is November 3, giving you a growing season of approximately 208 days.
At an elevation of 617 feet, Fairfield County receives approximately 41 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91°F, providing good warmth for Radish during the growing season.
Fairfield County Soil Profile
Soil Type
Silt Loam
Soil pH
5.1-6.4
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Plant Water Budget
Radish Planting Timeline — Fairfield County, CT
Radish Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | March 26 | Mar 26 – Apr 16 |
| Fall Sowing | August 25 | Aug 25 – Sep 8 |
| Harvest | April 23 | Apr 23 – May 14 |
Plant 0.5" deep · 2" apart · Rows 6" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Direct Sow |
| April | Direct Sow Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
22–35 days
Soil pH
6 – 7
USDA Zone
Zone 7a
Growing Season
208 days
Growing Tips for Fairfield 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
Level Up Your Garden
Radish in Other Locations
Frequently Asked Questions
When should I plant Radish in Fairfield County, CT?
Fairfield County is in Zone 7a with an average last frost of April 9. Plan your Radish planting based on this frost date — see the calendar above for exact timing.
What planting zone is Fairfield County, CT?
Fairfield County, Connecticut is in USDA Hardiness Zone 7a. The average last spring frost is April 9 and first fall frost is November 3.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Fairfield County gardeners in Zone 7a organize planting dates, track what's growing, and never miss a planting window.
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