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When to Plant Parsley in Caldwell County, MO

Parsley is a biennial herb available in flat-leaf (Italian) and curly varieties. It is a nutritional powerhouse rich in vitamins C and K and adds fresh flavor to countless dishes.

Caldwell County, Missouri is in USDA Zone 5b. The average last spring frost is April 13 and the first fall frost is October 22, giving you a growing season of approximately 192 days.

At an elevation of 1,389 feet, Caldwell County receives approximately 34 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84ยฐF, so choose short-season varieties of Parsley to ensure they mature before fall.

Caldwell County, MO (Zone 5b) Moderate season
192 days
Last Spring Frost April 13
192 growing days
First Fall Frost October 22

Caldwell County Soil Profile

Soil Type

Silt Loam

Soil pH

5.6-7.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (69 days to spare)
Start indoors: Mar 5 Transplant: Apr 2 🍅 Harvest: Jun 4 – Aug 6
Recommended (50%) ✓ Fits season (73 days to spare)
Start indoors: Mar 9 Transplant: Apr 6 🍅 Harvest: Jun 8 – Aug 10
Safe Start (90%) ✓ Fits season (67 days to spare)
Start indoors: Mar 26 Transplant: Apr 23 🍅 Harvest: Jun 25 – Aug 27

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

Plant needs
1.0″/week
Rainfall provides
0.7″/week
You supply
0.3″/week
Watering frequency Only during dry spells
Season total 438 gal / 100 sq ft
Parsley needs ~910 GDD — county provides 2,496 GDD Excellent fit

Parsley Planting Timeline โ€” Caldwell County, MO

Parsley Planting Calendar

Activity When Date Range
Start Indoors March 9 Mar 9 โ€“ Mar 23
Transplant Outdoors April 6 Apr 6 โ€“ Apr 20
Direct Sow March 30 Mar 30 โ€“ Apr 20
Fall Sowing August 13 Aug 13 โ€“ Aug 27
Harvest June 8 Jun 8 โ€“ Aug 10

Plant 0.5" deep ยท 8" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors Direct Sow
April Transplant Outdoors Direct Sow
May โ€”
June Harvest
July Harvest
August Fall Sowing Harvest
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

Moderate โ€” regular watering

Days to Maturity

60โ€“80 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 5b

Growing Season

192 days

Growing Tips for Caldwell County

Start seeds indoors 6-8 weeks before last frost. Soak seeds overnight as germination is slow. Harvest outer stems first to keep plants productive. Parsley attracts swallowtail butterflies.

Companion Planting

Good Companions

Avoid Planting Near

  • Mint
  • Lettuce

Level Up Your Garden

Frequently Asked Questions

When should I plant Parsley in Caldwell County, MO?

Caldwell County is in Zone 5b with an average last frost of April 13. Plan your Parsley planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Caldwell County, MO?

Caldwell County, Missouri is in USDA Hardiness Zone 5b. The average last spring frost is April 13 and first fall frost is October 22.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Caldwell County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Caldwell County, MO. Local conditions may vary. Last updated: April 2026.