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When to Plant Radish in Brevard County, FL

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.

Brevard County, Florida is in USDA Zone 9b. The average last spring frost is January 19 and the first fall frost is December 20, giving you a growing season of approximately 335 days.

At an elevation of 491 feet, Brevard County receives approximately 52.7 inches of rainfall annually with predominantly sand soil. Summer highs average 104ยฐF, so Radish may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Radish will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Radish root diseases.

Brevard County, FL (Zone 9b) Year-round
335 days
Last Spring Frost January 19
335 growing days
First Fall Frost December 20

Brevard County Soil Profile

Soil Type

Sand

Soil pH

4.8-5.9

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (289 days to spare)
Transplant: Jan 13 🍅 Harvest: Feb 10 – Mar 3
Recommended (50%) ✓ Fits season (286 days to spare)
Transplant: Jan 19 🍅 Harvest: Feb 16 – Mar 9
Safe Start (90%) ✓ Fits season (261 days to spare)
Transplant: Feb 17 🍅 Harvest: Mar 17 – Apr 7

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

Plant needs
1.0″/week
Rainfall provides
0.7″/week
You supply
0.8″/week
Watering frequency 2-3 times/week
Season total 2,301 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Radish needs ~798 GDD — county provides 9,408 GDD Excellent fit

Radish Planting Timeline โ€” Brevard County, FL

Radish Planting Calendar

Activity When Date Range
Direct Sow December 29 Dec 29 โ€“ Jan 19
Fall Sowing October 25 Oct 25 โ€“ Nov 8
Harvest January 26 Jan 26 โ€“ Feb 16

Plant 0.5" deep ยท 2" apart ยท Rows 6" apart

Month-by-Month Timeline

MonthActivities
January Direct Sow Harvest
February Harvest
March โ€”
April โ€”
May โ€”
June โ€”
July โ€”
August โ€”
September โ€”
October Fall Sowing
November Fall Sowing
December Direct Sow

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

22โ€“35 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 9b

Growing Season

335 days

Growing Tips for Brevard 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

  • Hyssop

Level Up Your Garden

Frequently Asked Questions

When should I plant Radish in Brevard County, FL?

Brevard County is in Zone 9b with an average last frost of January 19. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Brevard County, FL?

Brevard County, Florida is in USDA Hardiness Zone 9b. The average last spring frost is January 19 and first fall frost is December 20.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Brevard County gardeners in Zone 9b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Brevard County, FL. Local conditions may vary. Last updated: April 2026.