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When to Plant Shallot in McKean County, PA

McKean County, Pennsylvania Zone 5b May

Your May game plan for McKean County, Pennsylvania

Here's what deserves your attention in McKean County, Pennsylvania this month. Everything below is tailored to Zone 5b and timed around your local frost dates.

Avg. last frost May 18
Avg. first frost October 4
Soil temp (4") 59°F
Watering Moderate
Pest pressure Low
Daylight 14.4 hrs
  1. Move shallot from tray to bed

    Plant tomatoes deep — bury the stem up to the first true leaves to grow extra roots. Everything else goes in at the same depth it grew in the tray.

  2. Seed shallot outdoors

    Sow every 2 weeks for a continuous harvest. A single big planting means a single big glut.

To set up a strong June, finish these tasks
  • Starting indoors: shallot

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Shallots are a gourmet allium prized for their complex, sweet, and mild flavor. Each bulb multiplies into a cluster, making them easy and rewarding to grow.

McKean County, Pennsylvania is in USDA Zone 5b. The average last spring frost is May 18 and the first fall frost is October 4, giving you a growing season of approximately 139 days.

At an elevation of 991 feet, McKean County receives approximately 39 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Shallot during the growing season.

McKean County, PA (Zone 5b) Short season
139 days
Last Spring Frost May 18
139 growing days
First Fall Frost October 4

McKean County Soil Profile

Soil Type

Silt Loam

Soil pH

5-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Start indoors: Apr 7 Transplant: May 12 🍅 Harvest: Aug 11 – Sep 29
Recommended (50%) ✗ May not fit
Start indoors: Apr 13 Transplant: May 18 🍅 Harvest: Aug 17 – Oct 5
Safe Start (90%) ✗ May not fit
Start indoors: May 3 Transplant: Jun 7 🍅 Harvest: Sep 6 – Oct 25

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.

Soil Compatibility in McKean County

How your county's soil matches Shallot's growing requirements.

Soil pH

Your soil pH (5.0–6.7) is more acidic than Shallot prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

The silt loam soil in McKean County is excellent for Shallot — good drainage, moisture retention, and nutrient holding capacity.

Drainage

Drainage is adequate for Shallot.

Organic Matter

Organic matter is moderate (3.1%). Annual compost additions will help Shallot.

How to Plant Shallot

1"
Planting Depth
6"
Between Plants
12"
Between Rows

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
1.2″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

Monthly Watering Guide for Shallot

Shallot needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Shallot Needs Rainfall You Supplement Action
Jan 2.7" 0" ❄️ Dormant
Feb 2.2" 0" ❄️ Dormant
Mar 3.5" 0" ❄️ Dormant
Apr 3.6" 0" ❄️ Dormant
May 4.3" 3.6" 0.7" 💧 Light watering
Jun 4.3" 3.4" 0.9" 💧 Light watering
Jul 4.3" 4.2" 0.1" 💧 Light watering
Aug 4.3" 3.2" 1.1" 💧 Light watering
Sep 4.3" 3.1" 1.2" 💧 Light watering
Oct 4.3" 3.2" 1.1" 💧 Light watering
Nov 3.1" 0" ❄️ Dormant
Dec 3" 0" ❄️ Dormant

Water needs are for active growing months only (May–Oct in McKean County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Shallot Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Shallot needs ~1,444 GDD — county provides 1,911 GDD Excellent fit

Shallot Planting Timeline — McKean County, PA

Shallot Planting Calendar

Activity When Date Range
Start Indoors April 13 Apr 13 – Apr 27
Transplant Outdoors May 18 May 18 – Jun 1
Direct Sow May 4 May 4 – May 25
Harvest August 17 Aug 17 – Oct 5
Fall Sowing July 26 Jul 26 – Aug 9

Plant 1" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Natural rainfall sufficient

📅 Days to Maturity

90–120 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 5b

📆 Growing Season

139 days in McKean County

Growing Tips for Shallot in McKean County

Direct sow Shallot outdoors after May 18 in McKean County when soil has warmed and frost danger has passed.

Common pests for Shallot in this region include onion maggots and thrips. Use row covers early in the season and inspect plants weekly.

General growing tips

Plant sets in fall for spring harvest or early spring for summer harvest. Mulch heavily if overwintering. Harvest when tops brown and dry, then cure for storage.

Companion Planting

Good Companions

Avoid Planting Near

  • Peas
  • Green Beans

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Shallot in McKean County, PA?

McKean County is in Zone 5b with an average last frost of May 18. Plan your Shallot planting based on this frost date — see the calendar above for exact timing.

What planting zone is McKean County, PA?

McKean County, Pennsylvania is in USDA Hardiness Zone 5b. The average last spring frost is May 18 and first fall frost is October 4.

🌱

Your McKean County Garden Planner — Free

A 24-page printable planner built for McKean County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 McKean County, PA. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.