When to Plant Delicata Squash in Waukesha County, WI
May to-do list for Waukesha County, Wisconsin
May is a pivotal month for Waukesha County, Wisconsin gardens. Focus on these tasks first and you'll set up the rest of the season for success.
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Transplant delicata squash outside
Your last frost (April 27) has passed. These warm-season crops can handle outdoor soil now.
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Seed delicata squash outdoors
Succession planting is the secret here. Put in a row now, another in 2 weeks, a third in 4.
June will be here before you know it — start on
- Starting indoors: delicata squash
Delicata squash is a winter squash with an edible skin and sweet, creamy orange flesh. Its compact vines make it suitable for smaller gardens.
Waukesha County, Wisconsin is in USDA Zone 5b. The average last spring frost is April 27 and the first fall frost is October 12, giving you a growing season of approximately 168 days.
At an elevation of 1,352 feet, Waukesha County receives approximately 37.3 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Delicata Squash to ensure they mature before fall.
Waukesha County Soil Profile
Soil Type
Silt Loam
Soil pH
6.1-7.3
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 Waukesha County
How your county's soil matches Delicata Squash's growing requirements.
Soil pH
Your soil pH (6.1–7.3) overlaps with Delicata Squash's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Waukesha County is excellent for Delicata Squash — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Delicata Squash.
Organic Matter
Organic matter is excellent (4.2%) — Delicata Squash will thrive.
How to Plant Delicata Squash
Succession Planting Delicata Squash
Sow every 9.1 weeks. Last sowing by Jul 04 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Delicata Squash
Delicata Squash needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Delicata Squash Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.7" | 0" | ❄️ Dormant |
| Feb | — | 1.8" | 0" | ❄️ Dormant |
| Mar | — | 2.8" | 0" | ❄️ Dormant |
| Apr | 4.3" | 3.4" | 0.9" | 💧 Light watering |
| May | 4.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 4.5" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 4" | 0.3" | 💧 Light watering |
| Aug | 4.3" | 3.7" | 0.6" | 💧 Light watering |
| Sep | 4.3" | 3.2" | 1.1" | 💧 Light watering |
| Oct | 4.3" | 3.2" | 1.1" | 💧 Light watering |
| Nov | — | 2.6" | 0" | ❄️ Dormant |
| Dec | — | 2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Waukesha County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Delicata 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.
Delicata Squash Planting Timeline — Waukesha County, WI
Delicata Squash Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 23 | Mar 23 – Apr 6 |
| Transplant Outdoors | May 11 | May 11 – May 25 |
| Direct Sow | May 4 | May 4 – May 25 |
| Harvest | August 3 | Aug 3 – Sep 7 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | — |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
80–100 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 5b
📆 Growing Season
168 days in Waukesha County
Growing Tips for Delicata Squash in Waukesha County
Direct sow Delicata Squash outdoors after April 27 in Waukesha County when soil has warmed and frost danger has passed.
Common pests for Delicata 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
Direct sow after last frost on mounds. Harvest when skin is hard and ivory with green stripes. The thin skin does not need peeling. Stores 2-3 months in a cool place.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Delicata Squash in Other Locations
Frequently Asked Questions
When should I plant Delicata Squash in Waukesha County, WI?
Waukesha County is in Zone 5b with an average last frost of April 27. Plan your Delicata Squash planting based on this frost date — see the calendar above for exact timing.
What planting zone is Waukesha County, WI?
Waukesha County, Wisconsin is in USDA Hardiness Zone 5b. The average last spring frost is April 27 and first fall frost is October 12.
Your Waukesha County Garden Planner — Free
A 24-page printable planner built for Waukesha 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.