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When to Plant Honeydew in San Bernardino County, CA

Honeydew melons have smooth, pale green rinds and sweet, light green flesh. They require a long, warm growing season and are slightly more heat-tolerant than cantaloupe.

San Bernardino County, California is in USDA Zone 9a. The average last spring frost is February 24 and the first fall frost is November 25, giving you a growing season of approximately 274 days.

At an elevation of 1,012 feet, San Bernardino County receives approximately 16.9 inches of rainfall annually with predominantly loam soil. Summer highs average 97ยฐF, so Honeydew may need afternoon shade and extra watering during peak heat. With low rainfall, drip irrigation is essential for growing Honeydew successfully. Mulch heavily to conserve soil moisture.

San Bernardino County, CA (Zone 9a) Year-round
274 days
Last Spring Frost February 24
274 growing days
First Fall Frost November 25

San Bernardino County Soil Profile

Soil Type

Loam

Soil pH

5.9-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (140 days to spare)
Transplant: Feb 27 🍅 Harvest: May 22 – Jul 3
Recommended (50%) ✓ Fits season (134 days to spare)
Transplant: Mar 10 🍅 Harvest: Jun 2 – Jul 14
Safe Start (90%) ✓ Fits season (137 days to spare)
Transplant: Mar 21 🍅 Harvest: Jun 13 – Jul 25

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
0.9″/week
Watering frequency 2-3 times/week
Season total 2,179 gal / 100 sq ft
Drought risk

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

Honeydew needs ~2,161 GDD — county provides 6,256 GDD Excellent fit

Honeydew Planting Timeline โ€” San Bernardino County, CA

Honeydew Planting Calendar

Activity When Date Range
Transplant Outdoors March 10 Mar 10 โ€“ Mar 24
Harvest June 2 Jun 2 โ€“ Jul 14

Plant 1" deep ยท 30" apart ยท Rows 42" apart

Month-by-Month Timeline

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

80โ€“110 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 9a

Growing Season

274 days

Growing Tips for San Bernardino County

Start seeds indoors 4 weeks before transplanting. Plant on raised mounds of rich soil. Harvest when the blossom end gives slightly when pressed and the skin turns creamy yellow.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Level Up Your Garden

Frequently Asked Questions

When should I plant Honeydew in San Bernardino County, CA?

San Bernardino County is in Zone 9a with an average last frost of February 24. Plan your Honeydew planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is San Bernardino County, CA?

San Bernardino County, California is in USDA Hardiness Zone 9a. The average last spring frost is February 24 and first fall frost is November 25.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help San Bernardino County gardeners in Zone 9a 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 San Bernardino County, CA. Local conditions may vary. Last updated: April 2026.