When to Plant Tatsoi in Osage County, MO
Tatsoi is a compact Asian green forming beautiful rosettes of dark, spoon-shaped leaves with a mild mustard flavor. It is extremely cold-hardy and versatile.
Osage County, Missouri is in USDA Zone 6a. The average last spring frost is April 6 and the first fall frost is October 30, giving you a growing season of approximately 207 days.
At an elevation of 1,300 feet, Osage County receives approximately 38.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90°F, providing good warmth for Tatsoi during the growing season.
Osage County Soil Profile
Soil Type
Silt Loam
Soil pH
5.5-6.7
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
Tatsoi Planting Timeline — Osage County, MO
Tatsoi Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 2 | Mar 2 – Mar 16 |
| Transplant Outdoors | April 6 | Apr 6 – Apr 20 |
| Direct Sow | March 23 | Mar 23 – Apr 13 |
| Fall Sowing | August 21 | Aug 21 – Sep 4 |
| Harvest | May 11 | May 11 – Jun 15 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | Harvest |
| June | Harvest |
| July | — |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Partial Shade (3-6 hours)
Water
Moderate — regular watering
Days to Maturity
35–50 days
Soil pH
6 – 7.5
USDA Zone
Zone 6a
Growing Season
207 days
Growing Tips for Osage County
Direct sow in spring or fall. Tatsoi tolerates frost down to 15F. Harvest outer leaves or cut whole rosettes. Excellent in salads, stir-fries, or lightly wilted.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Tatsoi in Other Locations
Frequently Asked Questions
When should I plant Tatsoi in Osage County, MO?
Osage County is in Zone 6a with an average last frost of April 6. Plan your Tatsoi planting based on this frost date — see the calendar above for exact timing.
What planting zone is Osage County, MO?
Osage County, Missouri is in USDA Hardiness Zone 6a. The average last spring frost is April 6 and first fall frost is October 30.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Osage County gardeners in Zone 6a organize planting dates, track what's growing, and never miss a planting window.
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