When to Plant Brussels Sprout in Oklahoma

Growing Brussels Sprout in Oklahoma: Complete Guide

Brussels Sprout (Brassica oleracea var. gemmifera) is a warm-season crop that needs a head start indoors before Oklahoma's last frost. Depending on your zone, Oklahoma gardeners start seeds indoors between December 26, 2026 (Zone 8a) and January 21, 2027 (Zone 6b), then move transplants outside once their zone's last frost has passed — the zone table above has your exact dates.

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 84 days to maturity, Brussels Sprout needs the indoor head start that Oklahoma's growing season requires. Starting indoors ensures you have strong transplants ready the moment outdoor conditions are right.

Brussels Sprout requires full sun and regular moisture. Great Plains gardens face strong winds and variable moisture — windbreaks and drip irrigation help significantly.

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.