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When to Plant Shiso in Berrien County, GA

Shiso (perilla) is a fragrant Japanese herb with large, ruffled leaves in green or purple varieties. It has a unique flavor combining mint, basil, and anise.

Berrien County, Georgia is in USDA Zone 8b. The average last spring frost is March 5 and the first fall frost is November 23, giving you a growing season of approximately 263 days.

At an elevation of 251 feet, Berrien County receives approximately 59.5 inches of rainfall annually with predominantly clay loam soil. Summer highs average 93ยฐF, providing good warmth for Shiso during the growing season. Clay soil retains moisture well for Shiso, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Shiso root diseases.

Berrien County, GA (Zone 8b) Long season
263 days
Last Spring Frost March 5
263 growing days
First Fall Frost November 23

Berrien County Soil Profile

Soil Type

Clay Loam

Soil pH

5.7-6.5

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (142 days to spare)
Start indoors: Jan 3 Transplant: Mar 7 🍅 Harvest: May 2 – Jun 27
Recommended (50%) ✓ Fits season (137 days to spare)
Start indoors: Jan 15 Transplant: Mar 19 🍅 Harvest: May 14 – Jul 9
Safe Start (90%) ✓ Fits season (140 days to spare)
Start indoors: Feb 5 Transplant: Apr 9 🍅 Harvest: Jun 4 – Jul 30

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
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 117 gal / 100 sq ft
Shiso needs ~1,185 GDD — county provides 5,194 GDD Excellent fit

Shiso Planting Timeline โ€” Berrien County, GA

Shiso Planting Calendar

Activity When Date Range
Start Indoors January 15 Jan 15 โ€“ Jan 29
Transplant Outdoors March 19 Mar 19 โ€“ Apr 2
Direct Sow March 12 Mar 12 โ€“ Apr 2
Harvest May 14 May 14 โ€“ Jul 9

Plant 0.5" deep ยท 8" apart ยท Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

Moderate โ€” regular watering

Days to Maturity

50โ€“70 days

Soil pH

5.5 โ€“ 7

USDA Zone

Zone 8b

Growing Season

263 days

Growing Tips for Berrien County

Direct sow after last frost or start indoors. Both green and red varieties are available. Pinch tips to encourage bushiness. Self-sows prolifically; deadhead to control.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Shiso in Berrien County, GA?

Berrien County is in Zone 8b with an average last frost of March 5. Plan your Shiso planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Berrien County, GA?

Berrien County, Georgia is in USDA Hardiness Zone 8b. The average last spring frost is March 5 and first fall frost is November 23.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Berrien County gardeners in Zone 8b 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 Berrien County, GA. Local conditions may vary. Last updated: April 2026.