When to plant Celeriac in Saint Augustine,
Plant Celeriac in Saint Augustine from January 19 to February 9 in spring. Saint Augustine sits in USDA Zone 9b, with last frost around February 9 and first frost on December 2. A second sowing from October 7 to October 21 extends the harvest into fall.
When to Plant Celeriac in Saint Augustine, FL
What to do in June
June rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Saint Augustine, FL.
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Bring in the celeriac
If you can't use it all right away, check the food-preservation section of your planner.
Celeriac is a celery relative grown for its knobby, flavorful root rather than its stalks. It has a rich celery flavor and is excellent roasted, mashed, or in soups.
Saint Augustine, Florida is in USDA Zone 9b. The average last spring frost is February 9 and the first fall frost is December 2, giving you a growing season of approximately 296 days.
At an elevation of 57 feet, St. Johns County receives approximately 51.1 inches of rainfall annually with predominantly sand soil. Summer highs average 99°F, so Celeriac may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Celeriac will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Celeriac root diseases.
Saint Augustine Soil Profile
Soil Type
Sand
Soil pH
4.9-6.1
Drainage
Well Drained
Celeriac 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.
Soil Compatibility in Saint Augustine
How your county's soil matches Celeriac's growing requirements.
Soil pH
Your soil pH (4.9–6.1) is more acidic than Celeriac prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in St. Johns County warms quickly in spring but drains fast. Celeriac will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is low (1.5%). Add 2-3 inches of compost before planting Celeriac.
How to Plant Celeriac
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Celeriac Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Celeriac
Celeriac needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.
| Month | Celeriac Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.4" | 0" | ❄️ Dormant |
| Feb | 3.9" | 2.4" | 1.5" | 💧 Light watering |
| Mar | 3.9" | 2.8" | 1.1" | 💧 Light watering |
| Apr | 3.9" | 2.8" | 1.1" | 💧 Light watering |
| May | 3.9" | 3.5" | 0.4" | 💧 Light watering |
| Jun | 3.9" | 7" | 0" | ✅ Rainfall sufficient |
| Jul | 3.9" | 7.1" | 0" | ✅ Rainfall sufficient |
| Aug | 3.9" | 7.6" | 0" | ✅ Rainfall sufficient |
| Sep | 3.9" | 6.9" | 0" | ✅ Rainfall sufficient |
| Oct | 3.9" | 4.3" | 0" | ✅ Rainfall sufficient |
| Nov | 3.9" | 2.1" | 1.8" | 💧 Light watering |
| Dec | 3.9" | 2.3" | 1.6" | 💧 Light watering |
Water needs are for active growing months only (Feb–Dec in St. Johns County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Celeriac Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Celeriac Planting Timeline — Saint Augustine, FL
Celeriac Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 12 | Jan 12 – Jan 26 |
| Transplant Outdoors | February 9 | Feb 9 – Feb 23 |
| Direct Sow | January 19 | Jan 19 – Feb 9 |
| Harvest | May 25 | May 25 – Jun 29 |
| Fall Sowing | October 7 | Oct 7 – Oct 21 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Direct Sow |
| February | Transplant Outdoors Direct Sow |
| March | — |
| April | — |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · Only during dry spells
📅 Days to Maturity
100–120 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9b
📆 Growing Season
296 days in St. Johns County
Growing Tips for Celeriac in Saint Augustine
Direct sow Celeriac outdoors after February 09 in St. Johns County when soil has warmed and frost danger has passed.
Sandy soil in St. Johns County dries quickly — mulch Celeriac with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 99°F in St. Johns County, provide afternoon shade for Celeriac and water deeply in the morning.
Common pests for Celeriac in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 10-12 weeks before last frost. Remove side roots as they develop to encourage a single large bulb. Harvest after a light frost for best flavor.
Companion Planting
Good Companions
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Celeriac in Other Locations
When should I plant Celeriac in Saint Augustine, ?
In Saint Augustine, , plant Celeriac after the last frost (around February 9) and before the first frost (around December 2). Best results when soil holds above 50°F.
What growing zone is Saint Augustine, for Celeriac?
Saint Augustine sits in USDA Zone 9b. Celeriac grows reliably in zones 3a through 9b, so it's a good fit here.
Can Celeriac grow in Saint Augustine's climate?
Yes — Celeriac grows well in Saint Augustine's temperate climate. Saint Augustine averages a 297-day frost-free season, with last frost around February 9 and first frost around December 2.
Your St. Johns County Garden Planner — Free
A 22-page printable planner built for St. Johns County (Zone 9b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.