When to plant Cantaloupe in Plymouth County County,
Plymouth County County's 159-day season only supports one Cantaloupe planting per year. Sow between May 21 and June 4 for the best chance at full maturity before October 6.
When to Plant Cantaloupe in Plymouth County, IA
Top priorities for Plymouth County, Iowa gardeners in June
Each item below is timed to Plymouth County, Iowa's frost dates and soil temperatures. Skip nothing, stress about nothing.
A few tasks this June that'll pay off in July
- First harvests: cantaloupe
Cantaloupe is a sweet, aromatic melon with salmon-colored flesh and a netted rind. It requires a long, warm growing season and is the quintessential summer fruit.
Plymouth County, Iowa is in USDA Zone 5a. The average last spring frost is April 30 and the first fall frost is October 6, giving you a growing season of approximately 159 days.
At an elevation of 1,392 feet, Plymouth County receives approximately 38 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Cantaloupe to ensure they mature before fall.
Plymouth County Soil Profile
Soil Type
Silt Loam
Soil pH
6-7.2
Drainage
Well Drained
Cantaloupe Planting Risk Windows
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 Plymouth County
How your county's soil matches Cantaloupe's growing requirements.
Soil pH
Your soil pH (6.0–7.2) overlaps with Cantaloupe's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Plymouth County is excellent for Cantaloupe — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.7%) — Cantaloupe will thrive.
How to Plant Cantaloupe
Succession Planting Cantaloupe
Sow every 8 weeks. Last sowing by Jul 08 to harvest before frost.
Cantaloupe Water Budget
Monthly Watering Guide for Cantaloupe
Cantaloupe needs approximately 1.3 inches of water per week (5.6" per month). Here's how your county's rainfall compares month by month.
| Month | Cantaloupe Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.6" | 0" | ❄️ Dormant |
| Feb | — | 1.4" | 0" | ❄️ Dormant |
| Mar | — | 2.6" | 0" | ❄️ Dormant |
| Apr | 5.6" | 3.9" | 1.7" | 💧 Light watering |
| May | 5.6" | 4.8" | 0.8" | 💧 Light watering |
| Jun | 5.6" | 4.2" | 1.4" | 💧 Light watering |
| Jul | 5.6" | 4.4" | 1.2" | 💧 Light watering |
| Aug | 5.6" | 4.3" | 1.3" | 💧 Light watering |
| Sep | 5.6" | 3.4" | 2.2" | 💧 Light watering |
| Oct | 5.6" | 2.7" | 2.9" | 🚿 Regular watering |
| Nov | — | 2.8" | 0" | ❄️ Dormant |
| Dec | — | 1.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Plymouth County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Cantaloupe 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.
Cantaloupe Planting Timeline — Plymouth County, IA
Cantaloupe Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 21 | May 21 – Jun 4 |
| Harvest | July 30 | Jul 30 – Sep 3 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | Transplant Outdoors |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.3"/week · Only during dry spells
📅 Days to Maturity
70–90 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 5a
📆 Growing Season
159 days in Plymouth County
Growing Tips for Cantaloupe in Plymouth County
Direct sow Cantaloupe outdoors after April 30 in Plymouth County when soil has warmed and frost danger has passed.
Common pests for Cantaloupe 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 early or direct sow on warm mounds. Reduce watering as fruits ripen. Harvest when stem slips easily from the fruit with gentle pressure.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Cantaloupe in Other Locations
Frequently Asked Questions
When should I plant Cantaloupe in Plymouth County, IA?
Plymouth County is in Zone 5a with an average last frost of April 30. Plan your Cantaloupe planting based on this frost date — see the calendar above for exact timing.
What planting zone is Plymouth County, IA?
Plymouth County, Iowa is in USDA Hardiness Zone 5a. The average last spring frost is April 30 and first fall frost is October 6.
When should I plant Cantaloupe in Plymouth County County, ?
In Plymouth County County, , plant Cantaloupe after the last frost (around April 30) and before the first frost (around October 6). Best results when soil holds above 50°F.
What growing zone is Plymouth County County, for Cantaloupe?
Plymouth County County sits in USDA Zone 5a. Cantaloupe grows reliably in zones 4a through 11b, so it's a good fit here.
Can Cantaloupe grow in Plymouth County County's climate?
Yes — Cantaloupe grows well in Plymouth County County's temperate climate. Plymouth County County averages a 159-day frost-free season, with last frost around April 30 and first frost around October 6.
Your Plymouth County Garden Planner — Free
A 22-page printable planner built for Plymouth County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.