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When to Plant Blackberries in Lincoln County, ME

Blackberries are vigorous bramble fruits that produce sweet-tart berries on thorny or thornless canes. They are prolific producers and relatively low-maintenance once established.

Lincoln County, Maine is in USDA Zone 5b. The average last spring frost is May 3 and the first fall frost is October 9, giving you a growing season of approximately 159 days.

At an elevation of 815 feet, Lincoln County receives approximately 50 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87ยฐF, providing good warmth for Blackberries during the growing season.

Lincoln County, ME (Zone 5b) Moderate season
159 days
Last Spring Frost May 3
159 growing days
First Fall Frost October 9

Lincoln County Soil Profile

Soil Type

Silt Loam

Soil pH

5-6.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season
Transplant: May 20
Recommended (50%) ✓ Fits season
Transplant: May 24
Safe Start (90%) ✓ Fits season
Transplant: Jun 6

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
1.3″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Blackberries needs ~8,349 GDD — county provides 2,424 GDD May not mature

Blackberries Planting Timeline โ€” Lincoln County, ME

Blackberries Planting Calendar

Activity When Date Range
Transplant Outdoors May 24 May 24 โ€“ Jun 7

ยท 24" apart ยท Rows 72" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April โ€”
May Transplant Outdoors
June Transplant Outdoors
July โ€”
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

365โ€“730 days

Soil pH

5.5 โ€“ 7

USDA Zone

Zone 5b

Growing Season

159 days

Growing Tips for Lincoln County

Plant bare-root canes in spring. Provide a sturdy trellis system. Prune out spent fruiting canes after harvest. New canes fruit in their second year (floricanes).

Companion Planting

Good Companions

Avoid Planting Near

  • Tomatoes
  • Peppers

Level Up Your Garden

Frequently Asked Questions

When should I plant Blackberries in Lincoln County, ME?

Lincoln County is in Zone 5b with an average last frost of May 3. Plan your Blackberries planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Lincoln County, ME?

Lincoln County, Maine is in USDA Hardiness Zone 5b. The average last spring frost is May 3 and first fall frost is October 9.

๐ŸŒฑ

Plan Your Garden with Confidence

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