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When to Plant Black Beans in Anne Arundel County, MD

Black beans are a warm-season legume producing small, dark, protein-rich beans that are a staple in Latin American and Caribbean cuisines.

Anne Arundel County, Maryland is in USDA Zone 7a. The average last spring frost is April 3 and the first fall frost is November 3, giving you a growing season of approximately 214 days.

At an elevation of 435 feet, Anne Arundel County receives approximately 41 inches of rainfall annually with predominantly silt loam soil. Summer highs average 93ยฐF, providing good warmth for Black Beans during the growing season.

Anne Arundel County, MD (Zone 7a) Long season
214 days
Last Spring Frost April 3
214 growing days
First Fall Frost November 3

Anne Arundel County Soil Profile

Soil Type

Silt Loam

Soil pH

5.7-6.5

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (75 days to spare)
Transplant: Mar 29 🍅 Harvest: Jun 28 – Aug 16
Recommended (50%) ✓ Fits season (74 days to spare)
Transplant: Apr 3 🍅 Harvest: Jul 3 – Aug 21
Safe Start (90%) ✓ Fits season (75 days to spare)
Transplant: Apr 18 🍅 Harvest: Jul 18 – Sep 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
0.8″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 372 gal / 100 sq ft
Black Beans needs ~2,074 GDD — county provides 4,226 GDD Excellent fit

Black Beans Planting Timeline โ€” Anne Arundel County, MD

Black Beans Planting Calendar

Activity When Date Range
Direct Sow April 10 Apr 10 โ€“ May 1
Harvest July 10 Jul 10 โ€“ Aug 28

Plant 1" deep ยท 15" apart ยท Rows 24" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Direct Sow
May Direct Sow
June โ€”
July Harvest
August Harvest
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

90โ€“120 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 7a

Growing Season

214 days

Growing Tips for Anne Arundel County

Direct sow after last frost. Provide support for climbing varieties. Allow pods to dry fully on the vine before harvesting. Thresh dried pods by hand or in a pillowcase.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Level Up Your Garden

Frequently Asked Questions

When should I plant Black Beans in Anne Arundel County, MD?

Anne Arundel County is in Zone 7a with an average last frost of April 3. Plan your Black Beans planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Anne Arundel County, MD?

Anne Arundel County, Maryland is in USDA Hardiness Zone 7a. The average last spring frost is April 3 and first fall frost is November 3.

๐ŸŒฑ

Plan Your Garden with Confidence

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