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When to plant Watermelon in Baca County County,

The best window to plant Watermelon in Baca County County, is April 26–May 17, when soil warms to 50°F. Last frost typically hits April 19; first frost October 18.

When to Plant Watermelon in Baca County, CO

Watermelon
Baca County, Colorado Zone 6b June

Baca County, Colorado gardeners: here's your June plan

Each item below is timed to Baca County, Colorado's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost April 19
Avg. first frost October 18
Soil temp (4") 61°F
Watering Critical
Pest pressure High
Daylight 14.6 hrs
Get ahead of July
  • First harvests: watermelon

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Watermelon is a sprawling vine crop that produces sweet, juicy fruits in hot weather. Varieties range from personal-sized icebox types to 50-pound giants.

Baca County, Colorado is in USDA Zone 6b. The average last spring frost is April 19 and the first fall frost is October 18, giving you a growing season of approximately 182 days.

At an elevation of 4,958 feet, Baca County receives approximately 12.3 inches of rainfall annually with predominantly loam soil. Summer highs average 90°F, providing good warmth for Watermelon during the growing season. With low rainfall, drip irrigation is essential for growing Watermelon successfully. Mulch heavily to conserve soil moisture.

Baca County, CO (Zone 6b) Moderate season
182 days
Last Spring Frost April 19
182 growing days
First Fall Frost October 18
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Baca County Soil Profile

Soil Type

Loam

Soil pH

6.3-7.9

Drainage

Well Drained

Watermelon Planting Risk Windows

Early Start (70% safe) ✓ Fits season (49 days to spare)
Start indoors: Mar 10 Transplant: Apr 28 🍅 Harvest: Jul 7 – Aug 25
Recommended (50%) ✓ Fits season (49 days to spare)
Start indoors: Mar 15 Transplant: May 3 🍅 Harvest: Jul 12 – Aug 30
Safe Start (90%) ✓ Fits season (50 days to spare)
Start indoors: Mar 30 Transplant: May 18 🍅 Harvest: Jul 27 – Sep 14

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 Baca County

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

Soil pH

Your soil pH (6.3–7.9) overlaps with Watermelon's range (6.0–7.5), though not a perfect match.

Soil Texture

The loam soil in Baca County is excellent for Watermelon — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.4%). Annual compost additions will help Watermelon.

How to Plant Watermelon

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

Succession Planting Watermelon

3
successive plantings in your 182-day season

Sow every 8 weeks. Last sowing by Jul 10 to harvest before frost.

Watermelon Water Budget

Plant needs
1.5″/week
Rainfall provides
0.3″/week
You supply
1.5″/week
Watering frequency 2-3 times/week
Season total 2,364 gal / 100 sq ft
Drought risk

Water stress score is 8/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Watermelon

Watermelon needs approximately 1.5 inches of water per week (6.5" per month). Here's how your county's rainfall compares month by month.

Month Watermelon Needs Rainfall You Supplement Action
Jan 0.8" 0" ❄️ Dormant
Feb 0.7" 0" ❄️ Dormant
Mar 1" 0" ❄️ Dormant
Apr 6.5" 1.3" 5.2" 🚿 Regular watering
May 6.5" 1.4" 5.1" 🚿 Regular watering
Jun 6.5" 1" 5.5" 🚿 Regular watering
Jul 6.5" 1" 5.5" 🚿 Regular watering
Aug 6.5" 1.2" 5.3" 🚿 Regular watering
Sep 6.5" 1.1" 5.4" 🚿 Regular watering
Oct 6.5" 1.1" 5.4" 🚿 Regular watering
Nov 0.8" 0" ❄️ Dormant
Dec 0.7" 0" ❄️ Dormant

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

Watermelon 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.

Watermelon needs ~1,488 GDD — county provides 3,185 GDD Excellent fit

Watermelon Planting Timeline — Baca County, CO

Watermelon Planting Calendar

Activity When Date Range
Start Indoors March 15 Mar 15 – Mar 29
Transplant Outdoors May 3 May 3 – May 17
Direct Sow April 26 Apr 26 – May 17
Harvest July 12 Jul 12 – Aug 30

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1.5"/week · 2-3 times/week

📅 Days to Maturity

70–100 days

🧪 Soil pH

Needs 6–7.5 · Your soil: acceptable

🗺️ USDA Zone

Zone 6b

📆 Growing Season

182 days in Baca County

Growing Tips for Watermelon in Baca County

Direct sow Watermelon outdoors after April 19 in Baca County when soil has warmed and frost danger has passed.

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

Baca County receives only 12" of rain annually. Watermelon needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Start seeds indoors 3-4 weeks early or direct sow after soil is warm. Plant on mounds with plenty of space. Check ripeness by looking for a yellow ground spot and dull thump when tapped.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Watermelon in Baca County, CO?

Baca County is in Zone 6b with an average last frost of April 19. Plan your Watermelon planting based on this frost date — see the calendar above for exact timing.

What planting zone is Baca County, CO?

Baca County, Colorado is in USDA Hardiness Zone 6b. The average last spring frost is April 19 and first fall frost is October 18.

When should I plant Watermelon in Baca County, ?

In Baca County, , plant Watermelon after the last frost (around April 19) and before the first frost (around October 18). Best results when soil holds above 50°F.

What growing zone is Baca County, for Watermelon?

Baca County sits in USDA Zone 6b. Watermelon grows reliably in zones 4a through 11b, so it's a good fit here.

Can Watermelon grow in Baca County's climate?

Yes — Watermelon grows well in Baca County's temperate climate. Baca County averages a 182-day frost-free season, with last frost around April 19 and first frost around October 18.

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Your Baca County Garden Planner — Free

A 22-page printable planner built for Baca County (Zone 6b). 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 Baca County, CO. Local conditions may vary. Last updated: June 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.