Blog

When to Plant New Zealand Spinach in Shelby County, IN

New Zealand spinach is a heat-tolerant ground-cover plant with thick, triangular leaves that taste similar to true spinach. It thrives in hot weather when regular spinach bolts.

Shelby County, Indiana is in USDA Zone 6a. The average last spring frost is April 10 and the first fall frost is October 20, giving you a growing season of approximately 193 days.

At an elevation of 1,068 feet, Shelby County receives approximately 34.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86ยฐF, providing good warmth for New Zealand Spinach during the growing season.

Shelby County, IN (Zone 6a) Moderate season
193 days
Last Spring Frost April 10
193 growing days
First Fall Frost October 20

Shelby County Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (95 days to spare)
Start indoors: Feb 10 Transplant: Apr 21 🍅 Harvest: Jun 16 – Jul 14
Recommended (50%) ✓ Fits season (95 days to spare)
Start indoors: Feb 13 Transplant: Apr 24 🍅 Harvest: Jun 19 – Jul 17
Safe Start (90%) ✓ Fits season (87 days to spare)
Start indoors: Mar 4 Transplant: May 13 🍅 Harvest: Jul 8 – Aug 5

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
0.8″/week
You supply
0.3″/week
Watering frequency 1-2 times/week
Season total 518 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

New Zealand Spinach needs ~906 GDD — county provides 2,798 GDD Excellent fit

New Zealand Spinach Planting Timeline โ€” Shelby County, IN

New Zealand Spinach Planting Calendar

Activity When Date Range
Start Indoors February 13 Feb 13 โ€“ Feb 27
Transplant Outdoors April 24 Apr 24 โ€“ May 8
Direct Sow April 17 Apr 17 โ€“ May 8
Harvest June 19 Jun 19 โ€“ Jul 17

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

55โ€“70 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 6a

Growing Season

193 days

Growing Tips for Shelby County

Soak seeds overnight before planting. Direct sow after last frost. Pinch growing tips regularly to encourage bushy growth and tender new leaves.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant New Zealand Spinach in Shelby County, IN?

Shelby County is in Zone 6a with an average last frost of April 10. Plan your New Zealand Spinach planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Shelby County, IN?

Shelby County, Indiana is in USDA Hardiness Zone 6a. The average last spring frost is April 10 and first fall frost is October 20.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Shelby County gardeners in Zone 6a organize planting dates, track what's growing, and never miss a planting window.

Get Your Free Garden Planner →

Free download. Plan your entire garden season in minutes.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Shelby County, IN. Local conditions may vary. Last updated: April 2026.