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When to Plant Mustard Greens in Cross County, AR

Mustard greens are fast-growing brassicas with a spicy, peppery kick. They come in green, red, and purple varieties and are excellent cooked or in salads.

Cross County, Arkansas is in USDA Zone 7b. The average last spring frost is March 19 and the first fall frost is November 7, giving you a growing season of approximately 233 days.

At an elevation of 531 feet, Cross County receives approximately 53.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 89ยฐF, providing good warmth for Mustard Greens during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Mustard Greens root diseases.

Cross County, AR (Zone 7b) Long season
233 days
Last Spring Frost March 19
233 growing days
First Fall Frost November 7

Cross County Soil Profile

Soil Type

Silt Loam

Soil pH

5.7-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (136 days to spare)
Start indoors: Feb 5 Transplant: Mar 12 🍅 Harvest: Apr 16 – Jun 18
Recommended (50%) ✓ Fits season (135 days to spare)
Start indoors: Feb 12 Transplant: Mar 19 🍅 Harvest: Apr 23 – Jun 25
Safe Start (90%) ✓ Fits season (134 days to spare)
Start indoors: Mar 4 Transplant: Apr 8 🍅 Harvest: May 13 – Jul 15

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
1.0″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Mustard Greens needs ~670 GDD — county provides 3,902 GDD Excellent fit

Mustard Greens Planting Timeline โ€” Cross County, AR

Mustard Greens Planting Calendar

Activity When Date Range
Start Indoors February 12 Feb 12 โ€“ Feb 26
Transplant Outdoors March 19 Mar 19 โ€“ Apr 2
Direct Sow March 5 Mar 5 โ€“ Mar 26
Fall Sowing August 29 Aug 29 โ€“ Sep 12
Harvest April 23 Apr 23 โ€“ Jun 25

Plant 0.5" deep ยท 6" apart ยท Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

Moderate โ€” regular watering

Days to Maturity

30โ€“50 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 7b

Growing Season

233 days

Growing Tips for Cross County

Direct sow in early spring or fall. Harvest young leaves for milder flavor. Plants bolt quickly in heat so grow as a cool-season crop or provide shade.

Companion Planting

Good Companions

Avoid Planting Near

  • Strawberries

Level Up Your Garden

Frequently Asked Questions

When should I plant Mustard Greens in Cross County, AR?

Cross County is in Zone 7b with an average last frost of March 19. Plan your Mustard Greens planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Cross County, AR?

Cross County, Arkansas is in USDA Hardiness Zone 7b. The average last spring frost is March 19 and first fall frost is November 7.

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Plan Your Garden with Confidence

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