When to Plant Spinach in Oklahoma

Growing Spinach in Oklahoma: Complete Guide

Spinach (Spinacia oleracea) is a crop that grows best when sown directly in the garden. In Oklahoma, the right time to direct sow is around Sunday, February 22, 2026, once soil temperatures are consistently warm enough for germination.

Because Oklahoma stretches across 4 USDA hardiness zones (6b, 7a, 7b, 8a), 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 40 days to maturity, Spinach fits comfortably within Oklahoma's growing season in most zones. In the warmest parts of the state, a second planting later in the season may be possible.

Spinach requires partial shade to full sun and regular (keep moist) moisture. Most of Oklahoma receives adequate sunlight during the growing season, though gardeners in humid eastern regions should watch for fungal issues and ensure good air circulation.

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 Oklahoma.