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When to plant Melon in Fulton, CA

Fulton sits in USDA Zone 9b. Plant Melon between February 26 (after last frost on February 26) and March 19.

When to Plant Melon in Fulton, CA

Sonoma County, California Zone 9b June

June in the garden — Sonoma County, California

Your garden in Sonoma County, California is working on a schedule, even when you're not. Here's where you should be this June.

Avg. last frost February 26
Avg. first frost November 26
Soil temp (4") 84°F
Watering Critical
Pest pressure High
Daylight 14.7 hrs
  1. Bring in the melon

    Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.

July will be here before you know it — start on
  • First harvests: melon

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Melons are warm-season vine crops that produce sweet, juicy fruits in many varieties including muskmelon and honeydew. They need a long, hot growing season.

Fulton, California is in USDA Zone 9b. The average last spring frost is February 26 and the first fall frost is November 26, giving you a growing season of approximately 273 days.

At an elevation of 91 feet, Sonoma County receives approximately 31.1 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 90°F, providing good warmth for Melon during the growing season. Sandy soil warms quickly in spring — great for early planting — but Melon will need more frequent watering and organic matter to retain nutrients.

Fulton, CA (Zone 9b) Year-round
273 days
Last Spring Frost February 26
273 growing days
First Fall Frost November 26

Fulton Soil Profile

Soil Type

Sandy Loam

Soil pH

5.9-7

Drainage

Well Drained

Melon Planting Risk Windows

Early Start (70% safe) ✓ Fits season (159 days to spare)
Start indoors: Jan 13 Transplant: Feb 17 🍅 Harvest: Apr 28 – Jun 16
Recommended (50%) ✓ Fits season (147 days to spare)
Start indoors: Jan 29 Transplant: Mar 5 🍅 Harvest: May 14 – Jul 2
Safe Start (90%) ✓ Fits season (133 days to spare)
Start indoors: Mar 5 Transplant: Apr 9 🍅 Harvest: Jun 18 – Aug 6

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.

Soil Compatibility in Fulton

How your county's soil matches Melon's growing requirements.

Soil pH

Your soil pH (5.9–7.0) overlaps with Melon's range (6.0–7.0), though not a perfect match.

Soil Texture

Sandy soil in Sonoma County warms quickly in spring but drains fast. Melon will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Drainage is adequate for Melon.

Organic Matter

Organic matter is moderate (2.5%). Annual compost additions will help Melon.

How to Plant Melon

1"
Planting Depth
30"
Between Plants
42"
Between Rows

Succession Planting Melon

4
successive plantings in your 273-day season

Sow every 8 weeks. Last sowing by Aug 18 to harvest before frost.

Melon Water Budget

Plant needs
1.0″/week
Rainfall provides
0.5″/week
You supply
1.0″/week
Watering frequency 2-3 times/week
Season total 2,409 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Melon

Melon needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Melon Needs Rainfall You Supplement Action
Jan 6.2" 0" ❄️ Dormant
Feb 4.3" 6.8" 0" ✅ Rainfall sufficient
Mar 4.3" 5.2" 0" ✅ Rainfall sufficient
Apr 4.3" 2.3" 2" 💧 Light watering
May 4.3" 0.8" 3.5" 🚿 Regular watering
Jun 4.3" 0.1" 4.2" 🚿 Regular watering
Jul 4.3" 0" 4.3" 🚿 Regular watering
Aug 4.3" 0" 4.3" 🚿 Regular watering
Sep 4.3" 0.4" 3.9" 🚿 Regular watering
Oct 4.3" 1.3" 3" 🚿 Regular watering
Nov 4.3" 2.7" 1.6" 💧 Light watering
Dec 5.2" 0" ❄️ Dormant

Water needs are for active growing months only (Feb–Nov in Sonoma County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Melon Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Melon needs ~1,488 GDD — county provides 4,795 GDD Excellent fit

Melon Planting Timeline — Fulton, CA

Melon Planting Calendar

Activity When Date Range
Start Indoors January 29 Jan 29 – Feb 12
Transplant Outdoors March 5 Mar 5 – Mar 19
Direct Sow February 26 Feb 26 – Mar 19
Harvest May 14 May 14 – Jul 2

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · 2-3 times/week

📅 Days to Maturity

70–100 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 9b

📆 Growing Season

273 days in Sonoma County

Growing Tips for Melon in Fulton

Direct sow Melon outdoors after February 26 in Sonoma County when soil has warmed and frost danger has passed.

Sandy soil in Sonoma County dries quickly — mulch Melon with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

Common pests for Melon in this region include squash vine borer and cucumber beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 3-4 weeks before transplanting. Plant on raised mounds of compost-enriched soil. Reduce watering as fruits ripen to concentrate sweetness.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes
  • Cucumber

Check more plant combinations with our Companion Planting Checker →

When should I plant Melon in Fulton, CA?

In Fulton, CA, plant Melon after the last frost (around February 26) and before the first frost (around November 26). Best results when soil holds above 50°F.

What growing zone is Fulton, CA for Melon?

Fulton sits in USDA Zone 9b. Melon grows reliably in zones 4a through 11b, so it's a good fit here.

Can Melon grow in Fulton's climate?

Yes — Melon grows well in Fulton's temperate climate. Fulton averages a 274-day frost-free season, with last frost around February 26 and first frost around November 26.

🌱

Your Sonoma County Garden Planner — Free

A 22-page printable planner built for Sonoma County (Zone 9b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 Sonoma County, CA. Local conditions may vary. Last updated: June 2026.