When to Plant Celeriac in Smith County, MS
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.
Smith County, Mississippi is in USDA Zone 8a. The average last spring frost is March 13 and the first fall frost is November 13, giving you a growing season of approximately 245 days.
At an elevation of 492 feet, Smith County receives approximately 58.4 inches of rainfall annually with predominantly clay loam soil. Summer highs average 96°F, so Celeriac may need afternoon shade and extra watering during peak heat. Clay soil retains moisture well for Celeriac, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Celeriac root diseases.
Smith County Soil Profile
Soil Type
Clay Loam
Soil pH
5.7-6.5
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.
Soil Compatibility in Smith County
How your county's soil matches Celeriac's growing requirements.
Soil pH
Your soil pH (5.7–6.5) overlaps with Celeriac's range (6.0–7.0), though not a perfect match.
Soil Texture
Your soil has 33% clay, which can cause forked or stunted roots for Celeriac. Use raised beds with loose, sandy mix for best results.
Organic Matter
Organic matter is moderate (2.5%). Annual compost additions will help Celeriac.
How to Plant Celeriac
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Plant Water Budget
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 | — | 5.2" | 0" | ❄️ Dormant |
| Feb | — | 5.1" | 0" | ❄️ Dormant |
| Mar | 3.9" | 5.6" | 0" | ✅ Rainfall sufficient |
| Apr | 3.9" | 3.8" | 0.1" | 💧 Light watering |
| May | 3.9" | 4.6" | 0" | ✅ Rainfall sufficient |
| Jun | 3.9" | 5.2" | 0" | ✅ Rainfall sufficient |
| Jul | 3.9" | 6" | 0" | ✅ Rainfall sufficient |
| Aug | 3.9" | 5.1" | 0" | ✅ Rainfall sufficient |
| Sep | 3.9" | 4.8" | 0" | ✅ Rainfall sufficient |
| Oct | 3.9" | 4.1" | 0" | ✅ Rainfall sufficient |
| Nov | 3.9" | 4.2" | 0" | ✅ Rainfall sufficient |
| Dec | — | 4.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Smith 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 — Smith County, MS
Celeriac Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 6 | Feb 6 – Feb 20 |
| Transplant Outdoors | March 13 | Mar 13 – Mar 27 |
| Direct Sow | February 27 | Feb 27 – Mar 20 |
| Harvest | June 26 | Jun 26 – Jul 31 |
| Fall Sowing | September 4 | Sep 4 – Sep 18 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors Direct Sow |
| March | Transplant Outdoors Direct Sow |
| April | — |
| May | — |
| June | Harvest |
| July | Harvest |
| August | — |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · Natural rainfall sufficient
📅 Days to Maturity
100–120 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 8a
📆 Growing Season
245 days in Smith County
Growing Tips for Celeriac in Smith County
Direct sow Celeriac outdoors after March 13 in Smith County when soil has warmed and frost danger has passed.
With Smith County's clay soil (33% clay), work in 3-4 inches of compost before planting Celeriac. Avoid tilling when soil is wet to prevent compaction.
With summer highs reaching 96°F in Smith 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
Frequently Asked Questions
When should I plant Celeriac in Smith County, MS?
Smith County is in Zone 8a with an average last frost of March 13. Plan your Celeriac planting based on this frost date — see the calendar above for exact timing.
What planting zone is Smith County, MS?
Smith County, Mississippi is in USDA Hardiness Zone 8a. The average last spring frost is March 13 and first fall frost is November 13.
Plan Your Garden with Confidence
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