When to Plant Pumpkin in Harrison County, MS
Your May gardening checklist
Welcome to May in Zone 9a. These are the moves that will have the biggest impact on your growing season.
To set up a strong June, finish these tasks
- 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.
Harrison County, Mississippi is in USDA Zone 9a. The average last spring frost is March 4 and the first fall frost is November 26, giving you a growing season of approximately 267 days.
At an elevation of 190 feet, Harrison County receives approximately 53 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 96°F, so Pumpkin may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Pumpkin will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Pumpkin root diseases.
Harrison County Soil Profile
Soil Type
Sandy Loam
Soil pH
4.8-6.2
Drainage
Well Drained
Plant 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 Harrison County
How your county's soil matches Pumpkin's growing requirements.
Soil pH
Your soil pH (4.8–6.2) is more acidic than Pumpkin prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
Sandy soil in Harrison County warms quickly in spring but drains fast. Pumpkin will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Pumpkin.
Organic Matter
Organic matter is moderate (2.1%). Annual compost additions will help Pumpkin.
How to Plant Pumpkin
Plant 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 | — | 4.1" | 0" | ❄️ Dormant |
| Feb | — | 4.1" | 0" | ❄️ Dormant |
| Mar | 5.6" | 4.9" | 0.7" | 💧 Light watering |
| Apr | 5.6" | 3.8" | 1.8" | 💧 Light watering |
| May | 5.6" | 4.1" | 1.5" | 💧 Light watering |
| Jun | 5.6" | 4.9" | 0.7" | 💧 Light watering |
| Jul | 5.6" | 6.3" | 0" | ✅ Rainfall sufficient |
| Aug | 5.6" | 4.5" | 1.1" | 💧 Light watering |
| Sep | 5.6" | 4.2" | 1.4" | 💧 Light watering |
| Oct | 5.6" | 3.6" | 2" | 💧 Light watering |
| Nov | 5.6" | 4.3" | 1.3" | 💧 Light watering |
| Dec | — | 4.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Harrison 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 — Harrison County, MS
Pumpkin Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 4 | Feb 4 – Feb 18 |
| Transplant Outdoors | March 11 | Mar 11 – Mar 25 |
| Direct Sow | March 4 | Mar 4 – Mar 25 |
| Harvest | June 10 | Jun 10 – Jul 29 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Transplant Outdoors Direct Sow |
| April | — |
| May | — |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.3"/week · Only during dry spells
📅 Days to Maturity
85–120 days
🧪 Soil pH
Needs 6–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9a
📆 Growing Season
267 days in Harrison County
Growing Tips for Pumpkin in Harrison County
Direct sow Pumpkin outdoors after March 04 in Harrison County when soil has warmed and frost danger has passed.
Sandy soil in Harrison County dries quickly — mulch Pumpkin with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 96°F in Harrison County, provide afternoon shade for Pumpkin and water deeply in the morning.
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 Harrison County, MS?
Harrison County is in Zone 9a with an average last frost of March 4. Plan your Pumpkin planting based on this frost date — see the calendar above for exact timing.
What planting zone is Harrison County, MS?
Harrison County, Mississippi is in USDA Hardiness Zone 9a. The average last spring frost is March 4 and first fall frost is November 26.
Your Harrison County Garden Planner — Free
A 24-page printable planner built for Harrison County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.