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When to Plant Lemon Balm in Del Norte County, CA

Lemon balm is a vigorous perennial herb with bright green, lemon-scented leaves. It makes a refreshing tea and is easy to grow but can spread aggressively.

Del Norte County, California is in USDA Zone 8b. The average last spring frost is March 27 and the first fall frost is November 20, giving you a growing season of approximately 238 days.

At an elevation of 72 feet, Del Norte County receives approximately 43.8 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 89ยฐF, providing good warmth for Lemon Balm during the growing season. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Lemon Balm will need more frequent watering and organic matter to retain nutrients.

Del Norte County, CA (Zone 8b) Long season
238 days
Last Spring Frost March 27
238 growing days
First Fall Frost November 20

Del Norte County Soil Profile

Soil Type

Sandy Loam

Soil pH

5.9-7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (118 days to spare)
Transplant: Mar 12 🍅 Harvest: May 14 – Jul 2
Recommended (50%) ✓ Fits season (119 days to spare)
Transplant: Apr 3 🍅 Harvest: Jun 5 – Jul 24
Safe Start (90%) ✓ Fits season (108 days to spare)
Transplant: May 11 🍅 Harvest: Jul 13 – Aug 31

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
0.2″/week
Watering frequency Only during dry spells
Season total 481 gal / 100 sq ft
Lemon Balm needs ~1,089 GDD — county provides 3,986 GDD Excellent fit

Lemon Balm Planting Timeline โ€” Del Norte County, CA

Lemon Balm Planting Calendar

Activity When Date Range
Transplant Outdoors April 3 Apr 3 โ€“ Apr 17
Harvest June 5 Jun 5 โ€“ Jul 24

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Transplant Outdoors
May โ€”
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

60โ€“70 days

Soil pH

5.5 โ€“ 7.5

USDA Zone

Zone 8b

Growing Season

238 days

Growing Tips for Del Norte County

Start from seed, cuttings, or divisions. Contain in pots or use barriers to prevent spreading. Harvest frequently to keep plants bushy and prevent flowering.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Lemon Balm in Del Norte County, CA?

Del Norte County is in Zone 8b with an average last frost of March 27. Plan your Lemon Balm planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Del Norte County, CA?

Del Norte County, California is in USDA Hardiness Zone 8b. The average last spring frost is March 27 and first fall frost is November 20.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Del Norte 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 Del Norte County, CA. Local conditions may vary. Last updated: April 2026.