When to plant Pumpkin in Scott County, IA
In Scott County, plant Pumpkin in spring between April 22 and May 13, once soil temps hold above 50°F. Scott County's last frost averages April 15, so time plantings around the expected last-frost window for best survival. For a fall crop, sow between and — roughly 85–120 days before the first frost on October 17.
When to Plant Pumpkin in Scott County, IA
August in the garden — Scott County, Iowa
If you only do a handful of things in the garden this August, make it these. They're sequenced around your zone's frost timing.
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Pick pumpkin
Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.
A few tasks this August that'll pay off in September
- First harvests: pumpkin
Pumpkins are large-fruited squash varieties grown for eating, decoration, and seed production. They require ample space and a long, warm growing season.
Scott County, Iowa is in USDA Zone 5b. The average last spring frost is April 15 and the first fall frost is October 17, giving you a growing season of approximately 185 days.
At an elevation of 678 feet, Scott County receives approximately 37.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Pumpkin to ensure they mature before fall.
Scott County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-6.7
Drainage
Well Drained
Pumpkin 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 Scott County
How your county's soil matches Pumpkin's growing requirements.
Soil pH
Your soil pH (5.8–6.7) overlaps with Pumpkin's range (6.0–7.5), though not a perfect match.
Soil Texture
The silt loam soil in Scott County is excellent for Pumpkin — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.6%) — Pumpkin will thrive.
How to Plant Pumpkin
Pumpkin Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Pumpkin
Pumpkin 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 | Pumpkin Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.4" | 0" | ❄️ Dormant |
| Feb | — | 1.9" | 0" | ❄️ Dormant |
| Mar | — | 2.9" | 0" | ❄️ Dormant |
| Apr | 5.6" | 3.8" | 1.8" | 💧 Light watering |
| May | 5.6" | 4" | 1.6" | 💧 Light watering |
| Jun | 5.6" | 4.8" | 0.8" | 💧 Light watering |
| Jul | 5.6" | 4.6" | 1" | 💧 Light watering |
| Aug | 5.6" | 3.9" | 1.7" | 💧 Light watering |
| Sep | 5.6" | 3" | 2.6" | 💧 Light watering |
| Oct | 5.6" | 3" | 2.6" | 💧 Light watering |
| Nov | — | 2.5" | 0" | ❄️ Dormant |
| Dec | — | 2.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Scott County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Pumpkin 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.
Pumpkin Planting Timeline — Scott County, IA
Pumpkin Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 11 | Mar 11 – Mar 25 |
| Transplant Outdoors | April 29 | Apr 29 – May 13 |
| Direct Sow | April 22 | Apr 22 – May 13 |
| Harvest | July 29 | Jul 29 – Sep 16 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.3"/week · 1-2 times/week
📅 Days to Maturity
85–120 days
🧪 Soil pH
Needs 6–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 5b
📆 Growing Season
185 days in Scott County
Growing Tips for Pumpkin in Scott County
Direct sow Pumpkin outdoors after April 15 in Scott County when soil has warmed and frost danger has passed.
Common pests for Pumpkin in this region include squash vine borer and cucumber beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow on mounds after last frost. Allow 6-10 feet between plants. Slip a board under developing fruit to prevent rot. Harvest when rind is hard and deep in color.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Pumpkin in Other Locations
Frequently Asked Questions
When should I plant Pumpkin in Scott County, IA?
Scott County is in Zone 5b with an average last frost of April 15. Plan your Pumpkin planting based on this frost date — see the calendar above for exact timing.
What planting zone is Scott County, IA?
Scott County, Iowa is in USDA Hardiness Zone 5b. The average last spring frost is April 15 and first fall frost is October 17.
When should I plant Pumpkin in Scott County, IA?
In Scott County, IA, plant Pumpkin after the last frost (around April 15) and before the first frost (around October 17). Best results when soil holds above 50°F.
What growing zone is Scott County, IA for Pumpkin?
Scott County sits in USDA Zone 5b. Pumpkin grows reliably in zones 3a through 10b, so it's a good fit here.
Can Pumpkin grow in Scott County's climate?
Yes — Pumpkin grows well in Scott County's temperate climate. Scott County averages a 185-day frost-free season, with last frost around April 15 and first frost around October 17.
Your Scott County Garden Planner — Free
A 22-page printable planner built for Scott County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.