When to Plant Marigold in Wyoming

Growing Marigold in Wyoming: Complete Guide

Marigold (Tagetes patula) is a warm-season crop that needs a head start indoors before Wyoming's last frost. Most Wyoming gardeners begin seeds indoors around Sunday, March 14, 2027 and move transplants outside around Sunday, May 9, 2027, after the risk of frost has passed.

Because Wyoming stretches across 4 USDA hardiness zones (4a, 4b, 5a, 5b), 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 50 days to maturity, Marigold needs the indoor head start that Wyoming's growing season requires. Starting indoors ensures you have strong transplants ready the moment outdoor conditions are right.

Marigold requires full sun (6-8 hours) and moderate (1 inch/week) moisture. Mountain-state gardens contend with short seasons and intense UV at elevation — cold nights can persist well into June at higher altitudes.

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 Wyoming.