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When to Plant Celeriac in Grant County, NM

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.

Grant County, New Mexico is in USDA Zone 7a. The average last spring frost is April 27 and the first fall frost is October 22, giving you a growing season of approximately 178 days.

At an elevation of 3,721 feet, Grant County receives approximately 15.8 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 92ยฐF, providing good warmth for Celeriac during the growing season. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Celeriac will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing Celeriac successfully. Mulch heavily to conserve soil moisture.

Grant County, NM (Zone 7a) Moderate season
178 days
Last Spring Frost April 27
178 growing days
First Fall Frost October 22

Grant County Soil Profile

Soil Type

Sandy Loam

Soil pH

6.9-8.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (41 days to spare)
Start indoors: Mar 13 Transplant: Apr 17 🍅 Harvest: Jul 31 – Sep 4
Recommended (50%) ✓ Fits season (38 days to spare)
Start indoors: Mar 23 Transplant: Apr 27 🍅 Harvest: Aug 10 – Sep 14
Safe Start (90%) ✓ Fits season (29 days to spare)
Start indoors: Apr 17 Transplant: May 22 🍅 Harvest: Sep 4 – Oct 9

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
1.5″/week
Rainfall provides
0.4″/week
You supply
1.9″/week
Watering frequency 2-3 times/week
Season total 2,998 gal / 100 sq ft
Drought risk

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

Celeriac needs ~2,090 GDD — county provides 3,382 GDD Excellent fit

Celeriac Planting Timeline โ€” Grant County, NM

Celeriac Planting Calendar

Activity When Date Range
Start Indoors March 23 Mar 23 โ€“ Apr 6
Transplant Outdoors April 27 Apr 27 โ€“ May 11
Direct Sow April 13 Apr 13 โ€“ May 4
Fall Sowing August 13 Aug 13 โ€“ Aug 27
Harvest August 10 Aug 10 โ€“ Sep 14

Plant 1" deep ยท 15" apart ยท Rows 24" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

High โ€” keep soil consistently moist

Days to Maturity

100โ€“120 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 7a

Growing Season

178 days

Growing Tips for Grant County

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

Avoid Planting Near

  • Carrots
  • Parsnip

Level Up Your Garden

Frequently Asked Questions

When should I plant Celeriac in Grant County, NM?

Grant County is in Zone 7a with an average last frost of April 27. Plan your Celeriac planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Grant County, NM?

Grant County, New Mexico is in USDA Hardiness Zone 7a. The average last spring frost is April 27 and first fall frost is October 22.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Grant County gardeners in Zone 7a 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 Grant County, NM. Local conditions may vary. Last updated: April 2026.