When to Plant Spinach in Burnett County, WI
Spinach is a nutrient-packed cool-season green that grows quickly in spring and fall. It is rich in iron, vitamins, and antioxidants and excellent raw or cooked.
Burnett County, Wisconsin is in USDA Zone 3b. The average last spring frost is May 15 and the first fall frost is September 27, giving you a growing season of approximately 135 days.
At an elevation of 574 feet, Burnett County receives approximately 30.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 79°F, so choose short-season varieties of Spinach to ensure they mature before fall.
Burnett County Soil Profile
Soil Type
Silt Loam
Soil pH
6.2-7.3
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.
Plant Water Budget
Spinach Planting Timeline — Burnett County, WI
Spinach Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 3 | Apr 3 – Apr 17 |
| Transplant Outdoors | May 15 | May 15 – May 29 |
| Direct Sow | May 8 | May 8 – May 29 |
| Fall Sowing | July 5 | Jul 5 – Jul 19 |
| Harvest | June 19 | Jun 19 – Aug 21 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | Harvest |
| July | Fall Sowing Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Partial Shade (3-6 hours)
Water
Moderate — regular watering
Days to Maturity
35–50 days
Soil pH
6.5 – 7.5
USDA Zone
Zone 3b
Growing Season
135 days
Growing Tips for Burnett County
Direct sow as soon as soil can be worked in spring. Plant in partial shade for summer crops to delay bolting. Succession plant every 2 weeks for continuous harvest.
Companion Planting
Good Companions
Level Up Your Garden
Wind pollinated — isolate 1/2 mile for purity. Easy to let bolt in heat.
Spinach in Other Locations
Frequently Asked Questions
When should I plant Spinach in Burnett County, WI?
Burnett County is in Zone 3b with an average last frost of May 15. Plan your Spinach planting based on this frost date — see the calendar above for exact timing.
What planting zone is Burnett County, WI?
Burnett County, Wisconsin is in USDA Hardiness Zone 3b. The average last spring frost is May 15 and first fall frost is September 27.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Burnett County gardeners in Zone 3b organize planting dates, track what's growing, and never miss a planting window.
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