Blog

When to Plant Sunflower in Meade County, KY

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.

Meade County, Kentucky is in USDA Zone 6b. The average last spring frost is April 1 and the first fall frost is November 3, giving you a growing season of approximately 216 days.

At an elevation of 2,934 feet, Meade County receives approximately 45.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86ยฐF, providing good warmth for Sunflower during the growing season.

Meade County, KY (Zone 6b) Long season
216 days
Last Spring Frost April 1
216 growing days
First Fall Frost November 3

Meade County Soil Profile

Soil Type

Silt Loam

Soil pH

5.6-6.5

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (86 days to spare)
Start indoors: Jan 29 Transplant: Apr 9 🍅 Harvest: Jun 18 – Aug 6
Recommended (50%) ✓ Fits season (83 days to spare)
Start indoors: Feb 4 Transplant: Apr 15 🍅 Harvest: Jun 24 – Aug 12
Safe Start (90%) ✓ Fits season (89 days to spare)
Start indoors: Feb 20 Transplant: May 1 🍅 Harvest: Jul 10 – Aug 28

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 Meade County

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

Soil pH

Your soil pH (5.6โ€“6.5) overlaps with Sunflower's range (6.0โ€“7.5), though not a perfect match.

Soil Texture

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

Organic Matter

Organic matter is moderate (3.0%). Annual compost additions will help Sunflower.

How to Plant Sunflower

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

Succession Planting Sunflower

3
successive plantings in your 216-day season

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

Plant Water Budget

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

Monthly Watering Guide for Sunflower

Sunflower needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.

Month Sunflower Needs Rainfall You Supplement Action
Jan โ€” 4" 0" โ„๏ธ Dormant
Feb โ€” 4" 0" โ„๏ธ Dormant
Mar โ€” 3.8" 0" โ„๏ธ Dormant
Apr 2.2" 3.4" 0" โœ… Rainfall sufficient
May 2.2" 3.9" 0" โœ… Rainfall sufficient
Jun 2.2" 3.7" 0" โœ… Rainfall sufficient
Jul 2.2" 5.3" 0" โœ… Rainfall sufficient
Aug 2.2" 3.8" 0" โœ… Rainfall sufficient
Sep 2.2" 2.9" 0" โœ… Rainfall sufficient
Oct 2.2" 3.3" 0" โœ… Rainfall sufficient
Nov 2.2" 3.7" 0" โœ… Rainfall sufficient
Dec โ€” 3.8" 0" โ„๏ธ Dormant

Water needs are for active growing months only (Aprโ€“Nov in Meade County). Supplement amounts are based on average rainfall โ€” actual needs vary with temperature, soil, and mulching.

Sunflower 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" โ€” every day above 50ยฐF 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.

Sunflower needs ~1,232 GDD — county provides 3,132 GDD Excellent fit

Sunflower Planting Timeline โ€” Meade County, KY

Sunflower Planting Calendar

Activity When Date Range
Start Indoors February 4 Feb 4 โ€“ Feb 18
Transplant Outdoors April 15 Apr 15 โ€“ Apr 29
Direct Sow April 8 Apr 8 โ€“ Apr 29
Harvest June 24 Jun 24 โ€“ Aug 12

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

Month-by-Month Timeline

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

๐Ÿ—บ๏ธ USDA Zone

Zone 6b

๐Ÿ“† Growing Season

216 days in Meade County

Growing Tips for Sunflower in Meade County

Direct sow Sunflower outdoors after April 01 in Meade 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

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Sunflower in Meade County, KY?

Meade County is in Zone 6b with an average last frost of April 1. Plan your Sunflower planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Meade County, KY?

Meade County, Kentucky is in USDA Hardiness Zone 6b. The average last spring frost is April 1 and first fall frost is November 3.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Meade County gardeners in Zone 6b organize planting dates, track what's growing, and never miss a planting window.

Get Your Free Garden Planner →

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 Meade County, KY. Local conditions may vary. Last updated: April 2026.