When to Plant Rosemary in Kansas

Growing Rosemary in Kansas: Complete Guide

Rosemary (Salvia rosmarinus) is a warm-season crop that needs a head start indoors before Kansas's last frost. Depending on your zone, Kansas gardeners start seeds indoors between January 30, 2027 (Zone 7a) and February 9, 2027 (Zone 6a), then move transplants outside once their zone's last frost has passed — the zone table above has your exact dates.

Because Kansas stretches across 3 USDA hardiness zones (6a, 6b, 7a), 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 120 days to maturity, Rosemary needs the indoor head start that Kansas's growing season requires. Starting indoors ensures you have strong transplants ready the moment outdoor conditions are right.

Rosemary requires full sun (6+ hours) and low (drought tolerant) 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 Kansas.