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When to Plant Mustard Greens in Greene County, IN

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.

Greene County, Indiana is in USDA Zone 6a. The average last spring frost is April 15 and the first fall frost is October 21, giving you a growing season of approximately 189 days.

At an elevation of 1,023 feet, Greene County receives approximately 39 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91ยฐF, providing good warmth for Mustard Greens during the growing season.

Greene County, IN (Zone 6a) Moderate season
189 days
Last Spring Frost April 15
189 growing days
First Fall Frost October 21

Greene County Soil Profile

Soil Type

Silt Loam

Soil pH

5.8-7.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (92 days to spare)
Start indoors: Mar 5 Transplant: Apr 9 🍅 Harvest: May 14 – Jul 16
Recommended (50%) ✓ Fits season (91 days to spare)
Start indoors: Mar 11 Transplant: Apr 15 🍅 Harvest: May 20 – Jul 22
Safe Start (90%) ✓ Fits season (87 days to spare)
Start indoors: Mar 27 Transplant: May 1 🍅 Harvest: Jun 5 – Aug 7

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
0.9″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 224 gal / 100 sq ft
Mustard Greens needs ~730 GDD — county provides 3,449 GDD Excellent fit

Mustard Greens Planting Timeline โ€” Greene County, IN

Mustard Greens Planting Calendar

Activity When Date Range
Start Indoors March 11 Mar 11 โ€“ Mar 25
Transplant Outdoors April 15 Apr 15 โ€“ Apr 29
Direct Sow April 1 Apr 1 โ€“ Apr 22
Fall Sowing August 12 Aug 12 โ€“ Aug 26
Harvest May 20 May 20 โ€“ Jul 22

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors
April Transplant Outdoors Direct Sow
May Harvest
June Harvest
July Harvest
August Fall Sowing
September โ€”
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 6a

Growing Season

189 days

Growing Tips for Greene 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 Greene County, IN?

Greene County is in Zone 6a with an average last frost of April 15. Plan your Mustard Greens planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Greene County, IN?

Greene County, Indiana is in USDA Hardiness Zone 6a. The average last spring frost is April 15 and first fall frost is October 21.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Greene County gardeners in Zone 6a 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 Greene County, IN. Local conditions may vary. Last updated: April 2026.