When to Plant Butternut Squash in Lake of the Woods County, MN
Your May gardening checklist
Here's what deserves your attention in Lake of the Woods County, Minnesota this month. Everything below is tailored to Zone 3b and timed around your local frost dates.
June will be here before you know it — start on
- Transplants going out: butternut squash
- Direct-sowing: butternut squash
- Starting indoors: butternut squash
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.
Lake of the Woods County, Minnesota is in USDA Zone 3b. The average last spring frost is May 19 and the first fall frost is September 22, giving you a growing season of approximately 126 days.
At an elevation of 1,032 feet, Lake of the Woods County receives approximately 32.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80°F, so choose short-season varieties of Butternut Squash to ensure they mature before fall.
Lake of the Woods County Soil Profile
Soil Type
Silt Loam
Soil pH
5.7-7.2
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 Lake of the Woods County
How your county's soil matches Butternut Squash's growing requirements.
Soil pH
Your soil pH (5.7–7.2) overlaps with Butternut Squash's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Lake of the Woods 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 excellent (5.0%) — Butternut Squash will thrive.
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 | — | 1.2" | 0" | ❄️ Dormant |
| Feb | — | 1.6" | 0" | ❄️ Dormant |
| Mar | — | 2.5" | 0" | ❄️ Dormant |
| Apr | — | 2.8" | 0" | ❄️ Dormant |
| May | 4.8" | 4.4" | 0.4" | 💧 Light watering |
| Jun | 4.8" | 4" | 0.8" | 💧 Light watering |
| Jul | 4.8" | 3.6" | 1.2" | 💧 Light watering |
| Aug | 4.8" | 3.3" | 1.5" | 💧 Light watering |
| Sep | 4.8" | 3" | 1.8" | 💧 Light watering |
| Oct | — | 2.2" | 0" | ❄️ Dormant |
| Nov | — | 2.6" | 0" | ❄️ Dormant |
| Dec | — | 1.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Lake of the Woods 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 — Lake of the Woods County, MN
Butternut Squash Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 7 | Apr 7 – Apr 21 |
| Transplant Outdoors | June 9 | Jun 9 – Jun 23 |
| Direct Sow | June 2 | Jun 2 – Jun 23 |
| Harvest | September 8 | Sep 8 – Oct 13 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors |
| May | — |
| June | Transplant Outdoors Direct Sow |
| July | — |
| August | — |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.1"/week · 1-2 times/week
📅 Days to Maturity
85–110 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 3b
📆 Growing Season
126 days in Lake of the Woods County
Growing Tips for Butternut Squash in Lake of the Woods County
Direct sow Butternut Squash outdoors after May 19 in Lake of the Woods 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 Lake of the Woods County, MN?
Lake of the Woods County is in Zone 3b with an average last frost of May 19. Plan your Butternut Squash planting based on this frost date — see the calendar above for exact timing.
What planting zone is Lake of the Woods County, MN?
Lake of the Woods County, Minnesota is in USDA Hardiness Zone 3b. The average last spring frost is May 19 and first fall frost is September 22.
Your Lake of the Woods County Garden Planner — Free
A 24-page printable planner built for Lake of the Woods County (Zone 3b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.