When to Plant Butternut Squash in Providence County, RI
May to-do list for Providence County, Rhode Island
Welcome to May in Zone 6b. These are the moves that will have the biggest impact on your growing season.
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Set out butternut squash seedlings
Your last frost (April 23) has passed. These warm-season crops can handle outdoor soil now.
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Indoor seed-starting week for butternut squash
Your window is short. These crops want several weeks of indoor growth before they go outside.
Butternut squash is a popular winter squash with a long neck, small seed cavity, and sweet, nutty orange flesh. It stores exceptionally well for months.
Providence County, Rhode Island is in USDA Zone 6b. The average last spring frost is April 23 and the first fall frost is October 20, giving you a growing season of approximately 180 days.
At an elevation of 1,199 feet, Providence County receives approximately 50 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Butternut Squash during the growing season.
Providence County Soil Profile
Soil Type
Silt Loam
Soil pH
5-6.2
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 Providence County
How your county's soil matches Butternut Squash's growing requirements.
Soil pH
Your soil pH (5.0–6.2) is more acidic than Butternut Squash prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Providence County is excellent for Butternut Squash — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Butternut Squash.
Organic Matter
Organic matter is moderate (3.1%). Annual compost additions will help Butternut Squash.
How to Plant Butternut Squash
Plant Water Budget
Monthly Watering Guide for Butternut Squash
Butternut Squash needs approximately 1.1 inches of water per week (4.8" per month). Here's how your county's rainfall compares month by month.
| Month | Butternut Squash Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 3.6" | 0" | ❄️ Dormant |
| Feb | — | 2.9" | 0" | ❄️ Dormant |
| Mar | — | 4.2" | 0" | ❄️ Dormant |
| Apr | 4.8" | 4.7" | 0.1" | 💧 Light watering |
| May | 4.8" | 5.1" | 0" | ✅ Rainfall sufficient |
| Jun | 4.8" | 4.1" | 0.7" | 💧 Light watering |
| Jul | 4.8" | 4.9" | 0" | ✅ Rainfall sufficient |
| Aug | 4.8" | 5.2" | 0" | ✅ Rainfall sufficient |
| Sep | 4.8" | 4.6" | 0.2" | 💧 Light watering |
| Oct | 4.8" | 3.5" | 1.3" | 💧 Light watering |
| Nov | — | 4.1" | 0" | ❄️ Dormant |
| Dec | — | 3.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Providence County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Butternut Squash 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.
Butternut Squash Planting Timeline — Providence County, RI
Butternut Squash Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 19 | Mar 19 – Apr 2 |
| Transplant Outdoors | May 7 | May 7 – May 21 |
| Direct Sow | April 30 | Apr 30 – May 21 |
| Harvest | August 6 | Aug 6 – Sep 10 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | — |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.1"/week · Natural rainfall sufficient
📅 Days to Maturity
85–110 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 6b
📆 Growing Season
180 days in Providence County
Growing Tips for Butternut Squash in Providence County
Direct sow Butternut Squash outdoors after April 23 in Providence County when soil has warmed and frost danger has passed.
Common pests for Butternut Squash 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 weeks early or direct sow after frost. Allow 6-8 feet for sprawling vines. Harvest when the skin is hard and uniformly tan. Cure in the sun for 10 days.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Butternut Squash in Other Locations
Frequently Asked Questions
When should I plant Butternut Squash in Providence County, RI?
Providence County is in Zone 6b with an average last frost of April 23. Plan your Butternut Squash planting based on this frost date — see the calendar above for exact timing.
What planting zone is Providence County, RI?
Providence County, Rhode Island is in USDA Hardiness Zone 6b. The average last spring frost is April 23 and first fall frost is October 20.
Your Providence County Garden Planner — Free
A 24-page printable planner built for Providence 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.