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When to Plant Tatsoi in Beckham County, OK

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.

Beckham County, Oklahoma is in USDA Zone 7a. The average last spring frost is April 5 and the first fall frost is November 3, giving you a growing season of approximately 212 days.

At an elevation of 871 feet, Beckham County receives approximately 30 inches of rainfall annually with predominantly loam soil. Summer highs average 88ยฐF, providing good warmth for Tatsoi during the growing season.

Beckham County, OK (Zone 7a) Long season
212 days
Last Spring Frost April 5
212 growing days
First Fall Frost November 3

Beckham County Soil Profile

Soil Type

Loam

Soil pH

6.6-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (141 days to spare)
Start indoors: Feb 21 Transplant: Mar 28 🍅 Harvest: May 2 – Jun 6
Recommended (50%) ✓ Fits season (142 days to spare)
Start indoors: Mar 1 Transplant: Apr 5 🍅 Harvest: May 10 – Jun 14
Safe Start (90%) ✓ Fits season (147 days to spare)
Start indoors: Mar 11 Transplant: Apr 15 🍅 Harvest: May 20 – Jun 24

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
0.6″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 918 gal / 100 sq ft
Drought risk

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

Tatsoi needs ~680 GDD — county provides 3,392 GDD Excellent fit

Tatsoi Planting Timeline โ€” Beckham County, OK

Tatsoi Planting Calendar

Activity When Date Range
Start Indoors March 1 Mar 1 โ€“ Mar 15
Transplant Outdoors April 5 Apr 5 โ€“ Apr 19
Direct Sow March 22 Mar 22 โ€“ Apr 12
Fall Sowing August 25 Aug 25 โ€“ Sep 8
Harvest May 10 May 10 โ€“ Jun 14

Plant 0.5" deep ยท 6" 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 Harvest
June Harvest
July โ€”
August Fall Sowing
September Fall Sowing
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

Moderate โ€” regular watering

Days to Maturity

35โ€“50 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 7a

Growing Season

212 days

Growing Tips for Beckham 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

  • Strawberries

Level Up Your Garden

Frequently Asked Questions

When should I plant Tatsoi in Beckham County, OK?

Beckham County is in Zone 7a with an average last frost of April 5. Plan your Tatsoi planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Beckham County, OK?

Beckham County, Oklahoma is in USDA Hardiness Zone 7a. The average last spring frost is April 5 and first fall frost is November 3.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Beckham County gardeners in Zone 7a 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 Beckham County, OK. Local conditions may vary. Last updated: April 2026.