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When to Plant Kai Lan in Morrill County, NE

Kai lan (Chinese broccoli) is a brassica grown for its thick, glossy stems and small flower buds. It has a slightly bitter, broccoli-like flavor essential in Cantonese cooking.

Morrill County, Nebraska is in USDA Zone 4b. The average last spring frost is May 11 and the first fall frost is October 3, giving you a growing season of approximately 145 days.

At an elevation of 1,112 feet, Morrill County receives approximately 34.5 inches of rainfall annually with predominantly loam soil. Summer highs average 83ยฐF, so choose short-season varieties of Kai Lan to ensure they mature before fall.

Morrill County, NE (Zone 4b) Short season
145 days
Last Spring Frost May 11
145 growing days
First Fall Frost October 3

Morrill County Soil Profile

Soil Type

Loam

Soil pH

6.4-7.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (69 days to spare)
Start indoors: Mar 22 Transplant: May 3 🍅 Harvest: Jun 21 – Jul 19
Recommended (50%) ✓ Fits season (68 days to spare)
Start indoors: Mar 30 Transplant: May 11 🍅 Harvest: Jun 29 – Jul 27
Safe Start (90%) ✓ Fits season (70 days to spare)
Start indoors: Apr 8 Transplant: May 20 🍅 Harvest: Jul 8 – Aug 5

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
1.0″/week
Watering frequency Only during dry spells
Season total 1 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Kai Lan needs ~643 GDD — county provides 1,776 GDD Excellent fit

Kai Lan Planting Timeline โ€” Morrill County, NE

Kai Lan Planting Calendar

Activity When Date Range
Start Indoors March 30 Mar 30 โ€“ Apr 13
Transplant Outdoors May 11 May 11 โ€“ May 25
Direct Sow May 4 May 4 โ€“ May 25
Fall Sowing July 11 Jul 11 โ€“ Jul 25
Harvest June 29 Jun 29 โ€“ Jul 27

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

45โ€“60 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 4b

Growing Season

145 days

Growing Tips for Morrill County

Direct sow in spring or fall. Harvest when flower buds first appear but before they open. Cut stems at the base to encourage side shoots. Prefers cool weather.

Companion Planting

Good Companions

Avoid Planting Near

  • Strawberries

Level Up Your Garden

Frequently Asked Questions

When should I plant Kai Lan in Morrill County, NE?

Morrill County is in Zone 4b with an average last frost of May 11. Plan your Kai Lan planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Morrill County, NE?

Morrill County, Nebraska is in USDA Hardiness Zone 4b. The average last spring frost is May 11 and first fall frost is October 3.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Morrill County gardeners in Zone 4b 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 Morrill County, NE. Local conditions may vary. Last updated: April 2026.