When to Plant Sunflower in Arkansas

Growing Sunflower in Arkansas: Complete Guide

Sunflower (Helianthus annuus) is a crop that grows best when sown directly in the garden. In Arkansas, the right time to direct sow is around Sunday, March 22, 2026, once soil temperatures are consistently warm enough for germination.

Because Arkansas stretches across 4 USDA hardiness zones (7a, 7b, 8a, 8b), planting windows can shift by as much as two to four weeks from one end of the state to the other. Gardeners in the warmer southern zones can start earlier, while those in cooler northern zones should wait until the zone table above shows their last frost has passed.

With 80 days to maturity, Sunflower fits comfortably within Arkansas's growing season in most zones. In the warmest parts of the state, a second planting later in the season may be possible.

Sunflower requires full sun (6-8 hours) and low-moderate (1 inch/week) moisture. Southeastern summers are hot and humid; mulch heavily to retain moisture and shade roots during peak heat.

For the most precise planting dates tailored to your exact location, enter your ZIP code on our planting calendar or use the zone table above to find the schedule for your area of Arkansas.