When to Plant Radishes in Spring Hill, FL
Published: April 24, 2026
Radish Planting Dates for Spring Hill, FL
| Start seeds indoors | Year-round |
| Last frost (average) | January 30 |
| Direct sow outdoors | December 26–January 5 |
| Minimum soil temperature | 40°F |
| Expect first harvest | January 17 – January 25 |
| Fall crop planting | November 10–20 |
| Fall crop harvest | December 2 |
| First fall frost (average) | December 15 |
⚠ Direct sow radishes 4–6 weeks before last frost — one of the fastest crops in the garden. Ready in as little as 22 days. Succession plant every 2 weeks for continuous harvest.
Best Radish Varieties for Spring Hill, FL
Consult a Spring Hill-area nursery or your state extension office for radish varieties proven in Zone 9a.
Growing Radishes in Spring Hill
Spring Hill sits in Zone 9a, with an average last frost of January 30 and first fall frost around December 15 — giving a 319-day frost-free growing season. Cool-season crops like radish benefit from Spring Hill's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
In Spring Hill's warm climate, radish works best as a fall, winter, and early-spring crop. Summer heat bolts most cool-season vegetables before they can produce a harvestable head or root. Plan primary plantings in October through February in Spring Hill, not April through June.
Spring Hill's sandy soils drain fast — Spring Hill gardeners should water radish more frequently (every 2 to 3 days during peak summer) and add generous compost to improve moisture retention. Raised beds with amended soil perform significantly better than in-ground planting in sandy conditions. Target 1 inches of total water per week, split across several irrigation sessions rather than one deep soaking.
Radish Calendar for Spring Hill
| Month | Task |
|---|---|
| Year | Start seeds indoors under grow lights |
| January | Last frost — soil warming, prepare bed |
| December | Direct sow seeds into warm soil |
| January | Expect first harvest window to open |
| November | Start fall crop — transplants or direct sow |
| December | First fall frost — harvest remaining, end of outdoor season |
Radish Tips for Spring Hill Gardeners
- •Thin to 2-inch spacing when seedlings are an inch tall — crowded radishes produce small woody roots.
- •Succession plant every 10–14 days from early spring through late spring for continuous harvest.
- •Plant cool-season radish in Spring Hill during October through February — spring plantings bolt before producing a usable crop in warm zones.
Common Radish Pests in Spring Hill
- •Flea Beetle — peaks June–August in Zone 9a (active March–October); tiny black beetles that riddle leaves with holes; row covers protect seedlings.
- •Cabbage Root Maggot — peaks June–August in Zone 9a (active March–October); monitor closely during peak season and treat early.
- •Aphid — peaks June–August in Zone 9a (active March–October); monitor closely during peak season and treat early.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Radishes in Spring Hill
In Spring Hill's warm climate, Lettuce and Carrot are the most beneficial plants to grow alongside radish. Lettuce improves nearby plant health and pest resistance. Keep radish away from Hyssop — it competes for nutrients or shares pest pressure. Warm-climate gardeners especially benefit from dense, layered companion plantings that shade soil and reduce water loss.
Frequently Asked Questions
When should I plant radish in Spring Hill, FL?
In Spring Hill (Zone 9a), direct sow radish around December 26–January 5. Soil must be at 40°F or warmer at 2-inch depth before sowing — cold soil rots the seeds.
What zone is Spring Hill, FL for radish growing?
Spring Hill is USDA Zone 9a. For radish, this means a frost-free growing season of roughly 46 weeks running from January 30 to December 15. Cool-season crops like radish thrive in this zone with both spring and fall planting windows available.
When is radish harvest season in Spring Hill?
Expect the first radish harvest in Spring Hill around January 17, with harvest continuing through January 25. This is based on 22–30 days from transplant or direct sow. A fall crop planted November 10–20 adds a second harvest around December 2.
How long does it take to grow radish in Spring Hill, FL?
From transplant or direct sow to first harvest, radish takes 22–30 days in Spring Hill's climate. Based on a typical planting date of December 26–January 5, expect your first harvest around January 17. Spring Hill's warm Zone 9a climate tends toward the faster end of this range — warmer soil and longer days accelerate maturity.
What soil does radish need in Spring Hill?
Spring Hill's sandy soils drain fast and lose nutrients quickly — a challenge for radish which prefers steady moisture. Add 4–6 inches of compost annually to improve moisture retention. Water more frequently but with less volume per session, and mulch heavily to reduce evaporation.