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When to Plant Watercress in Morgan County, UT

Watercress is a semi-aquatic plant with a peppery, tangy flavor rich in vitamins and minerals. It grows naturally along streams and can be cultivated in containers with standing water.

Morgan County, Utah is in USDA Zone 5b. The average last spring frost is June 17 and the first fall frost is August 31, giving you a growing season of approximately 75 days.

At an elevation of 6,439 feet, Morgan County receives approximately 14.4 inches of rainfall annually with predominantly loam soil. Summer highs average 84ยฐF, so choose short-season varieties of Watercress to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Watercress successfully. Mulch heavily to conserve soil moisture.

Morgan County, UT (Zone 5b) Very short season
75 days
Last Spring Frost June 17
75 growing days
First Fall Frost August 31

Morgan County Soil Profile

Soil Type

Loam

Soil pH

6.5-8.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Start indoors: May 6 Transplant: Jun 10 🍅 Harvest: Jul 22 – Aug 26
Recommended (50%) ✗ May not fit
Start indoors: May 13 Transplant: Jun 17 🍅 Harvest: Jul 29 – Sep 2
Safe Start (90%) ✓ Fits season (10 days to spare)
Start indoors: May 20 Transplant: Jun 24 🍅 Harvest: Aug 5 – Sep 9

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
1.5″/week
Rainfall provides
0.8″/week
You supply
1.4″/week
Watering frequency 2-3 times/week
Season total 916 gal / 100 sq ft
Drought risk

Water stress score is 8/10 โ€” consider drought-tolerant varieties and mulching

Watercress needs ~650 GDD — county provides 975 GDD Excellent fit

Watercress Planting Timeline โ€” Morgan County, UT

Watercress Planting Calendar

Activity When Date Range
Start Indoors May 13 May 13 โ€“ May 27
Transplant Outdoors June 17 Jun 17 โ€“ Jul 1
Direct Sow June 3 Jun 3 โ€“ Jun 24
Fall Sowing June 22 Jun 22 โ€“ Jul 6
Harvest July 29 Jul 29 โ€“ Sep 2

Plant 0.5" deep ยท 6" apart ยท Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

High โ€” keep soil consistently moist

Days to Maturity

40โ€“60 days

Soil pH

6.5 โ€“ 7.5

USDA Zone

Zone 5b

Growing Season

75 days

Growing Tips for Morgan County

Grow in containers with trays of water kept fresh. Provide partial shade and cool conditions. Harvest stems by cutting above water level. Replace water frequently to prevent stagnation.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Watercress in Morgan County, UT?

Morgan County is in Zone 5b with an average last frost of June 17. Plan your Watercress planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Morgan County, UT?

Morgan County, Utah is in USDA Hardiness Zone 5b. The average last spring frost is June 17 and first fall frost is August 31.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Morgan 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 Morgan County, UT. Local conditions may vary. Last updated: April 2026.