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When to Plant Sunflower in Fulton County, NY

Sunflowers are tall, cheerful annuals grown for their edible seeds and as pollinator magnets. They come in sizes from 2-foot dwarfs to 12-foot giants.

Fulton County, New York is in USDA Zone 5a. The average last spring frost is May 14 and the first fall frost is October 4, giving you a growing season of approximately 143 days.

At an elevation of 566 feet, Fulton County receives approximately 46.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83ยฐF, so choose short-season varieties of Sunflower to ensure they mature before fall.

Fulton County, NY (Zone 5a) Short season
143 days
Last Spring Frost May 14
143 growing days
First Fall Frost October 4

Fulton County Soil Profile

Soil Type

Silt Loam

Soil pH

5-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (11 days to spare)
Start indoors: Mar 11 Transplant: May 20 🍅 Harvest: Jul 29 – Sep 16
Recommended (50%) ✓ Fits season (10 days to spare)
Start indoors: Mar 19 Transplant: May 28 🍅 Harvest: Aug 6 – Sep 24
Safe Start (90%) ✓ Fits season (10 days to spare)
Start indoors: Apr 5 Transplant: Jun 14 🍅 Harvest: Aug 23 – Oct 11

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 Fulton County

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

Soil pH

Your soil pH (5.0โ€“6.8) is more acidic than Sunflower prefers (6.0โ€“7.5). Add garden lime to raise pH.

Soil Texture

The silt loam soil in Fulton County is excellent for Sunflower โ€” good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (3.9%). Annual compost additions will help Sunflower.

How to Plant Sunflower

1"
Planting Depth
18"
Between Plants
30"
Between Rows

Succession Planting Sunflower

2
successive plantings in your 143-day season

Sow every 8 weeks. Last sowing by Jun 26 to harvest before frost.

Plant Water Budget

Plant needs
0.5″/week
Rainfall provides
1.4″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Sunflower needs ~1,041 GDD — county provides 1,751 GDD Excellent fit

Sunflower Planting Timeline โ€” Fulton County, NY

Sunflower Planting Calendar

Activity When Date Range
Start Indoors March 19 Mar 19 โ€“ Apr 2
Transplant Outdoors May 28 May 28 โ€“ Jun 11
Direct Sow May 21 May 21 โ€“ Jun 11
Harvest August 6 Aug 6 โ€“ Sep 24

Plant 1" deep ยท 18" apart ยท Rows 30" apart

Month-by-Month Timeline

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

Growing Conditions

โ˜€๏ธ Sun

Full Sun (6-8+ hours)

๐Ÿ’ง Water

0.5"/week ยท Natural rainfall sufficient

๐Ÿ“… Days to Maturity

70โ€“100 days

๐Ÿงช Soil pH

Needs 6โ€“7.5 ยท Your soil: too_acidic

๐Ÿ—บ๏ธ USDA Zone

Zone 5a

๐Ÿ“† Growing Season

143 days in Fulton County

Growing Tips for Sunflower in Fulton County

Direct sow Sunflower outdoors after May 14 in Fulton County when soil has warmed and frost danger has passed.

Common pests for Sunflower in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.

General growing tips

Direct sow after last frost. Stake tall varieties in windy areas. Harvest seed heads when the back turns brown and seeds are plump. Dry heads upside down.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Level Up Your Garden

Frequently Asked Questions

When should I plant Sunflower in Fulton County, NY?

Fulton County is in Zone 5a with an average last frost of May 14. Plan your Sunflower planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Fulton County, NY?

Fulton County, New York is in USDA Hardiness Zone 5a. The average last spring frost is May 14 and first fall frost is October 4.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Fulton County gardeners in Zone 5a organize planting dates, track what's growing, and never miss a planting window.

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Free download. Plan your entire garden season in minutes.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Fulton County, NY. Local conditions may vary. Last updated: April 2026.