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When to Plant Shiso in Luna County, NM

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.

Luna County, New Mexico is in USDA Zone 8a. The average last spring frost is April 25 and the first fall frost is October 25, giving you a growing season of approximately 183 days.

At an elevation of 4,135 feet, Luna County receives approximately 13 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 96ยฐF, so Shiso may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Shiso will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing Shiso successfully. Mulch heavily to conserve soil moisture.

Luna County, NM (Zone 8a) Moderate season
183 days
Last Spring Frost April 25
183 growing days
First Fall Frost October 25

Luna County Soil Profile

Soil Type

Sandy Loam

Soil pH

6.7-8.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (56 days to spare)
Start indoors: Feb 27 Transplant: May 1 🍅 Harvest: Jun 26 – Aug 21
Recommended (50%) ✓ Fits season (57 days to spare)
Start indoors: Mar 7 Transplant: May 9 🍅 Harvest: Jul 4 – Aug 29
Safe Start (90%) ✓ Fits season (47 days to spare)
Start indoors: Mar 28 Transplant: May 30 🍅 Harvest: Jul 25 – Sep 19

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
0.3″/week
You supply
1.2″/week
Watering frequency 2-3 times/week
Season total 1,958 gal / 100 sq ft
Drought risk

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

Shiso needs ~1,320 GDD — county provides 4,026 GDD Excellent fit

Shiso Planting Timeline โ€” Luna County, NM

Shiso Planting Calendar

Activity When Date Range
Start Indoors March 7 Mar 7 โ€“ Mar 21
Transplant Outdoors May 9 May 9 โ€“ May 23
Direct Sow May 2 May 2 โ€“ May 23
Harvest July 4 Jul 4 โ€“ Aug 29

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors
April โ€”
May Transplant Outdoors Direct Sow
June โ€”
July Harvest
August Harvest
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 8a

Growing Season

183 days

Growing Tips for Luna 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 Luna County, NM?

Luna County is in Zone 8a with an average last frost of April 25. Plan your Shiso planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Luna County, NM?

Luna County, New Mexico is in USDA Hardiness Zone 8a. The average last spring frost is April 25 and first fall frost is October 25.

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Plan Your Garden with Confidence

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