When to plant Arugula in Washington County, MO
For Washington County, gardeners: plant Arugula March 27 through April 17 once soil reads 50°F. A second sowing from August 15 to August 29 extends the harvest into fall.
When to Plant Arugula in Washington County, MO
Arugula is a fast-growing cool-season green with a peppery, nutty flavor. It is excellent in salads and can be harvested as baby greens or mature leaves.
Washington County, Missouri is in USDA Zone 6b. The average last spring frost is April 10 and the first fall frost is October 24, giving you a growing season of approximately 197 days.
At an elevation of 738 feet, Washington County receives approximately 36.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Arugula during the growing season.
Washington County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Arugula Planting Timeline — Washington County, MO
Arugula Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 6 | Mar 6 – Mar 20 |
| Transplant Outdoors | April 10 | Apr 10 – Apr 24 |
| Direct Sow | March 27 | Mar 27 – Apr 17 |
| Harvest | May 15 | May 15 – Jul 17 |
| Fall Sowing | August 15 | Aug 15 – Aug 29 |
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 | Harvest |
| August | Fall Sowing |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
30–50 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 6b
📆 Growing Season
197 days in Washington County
Growing Tips for Washington County
Sow seeds directly every 2-3 weeks for continuous harvest. Provide afternoon shade in warm weather to prevent bolting. Harvest outer leaves first to extend production.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Arugula in Other Locations
Frequently Asked Questions
When should I plant Arugula in Washington County, MO?
Washington County is in Zone 6b with an average last frost of April 10. Plan your Arugula planting based on this frost date — see the calendar above for exact timing.
What planting zone is Washington County, MO?
Washington County, Missouri is in USDA Hardiness Zone 6b. The average last spring frost is April 10 and first fall frost is October 24.
When should I plant Arugula in Washington County, MO?
In Washington County, MO, plant Arugula after the last frost (around April 10) and before the first frost (around October 24). Best results when soil holds above 50°F.
What growing zone is Washington County, MO for Arugula?
Washington County sits in USDA Zone 6b. Arugula grows reliably in zones 3a through 11b, so it's a good fit here.
Can Arugula grow in Washington County's climate?
Yes — Arugula grows well in Washington County's temperate climate. Washington County averages a 197-day frost-free season, with last frost around April 10 and first frost around October 24.
Your Washington County Garden Planner — Free
A 22-page printable planner built for Washington 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.