When to Plant Celosia in Oregon

Growing Celosia in Oregon: Complete Guide

Celosia (Celosia argentea) is a warm-season crop that needs a head start indoors before Oregon's last frost. Depending on your zone, Oregon gardeners start seeds indoors between December 30, 2026 (Zone 9b) and March 14, 2027 (Zone 5b), then move transplants outside once their zone's last frost has passed — the zone table above has your exact dates.

Because Oregon stretches across 9 USDA hardiness zones (5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b), planting windows can shift by as much as six to eight 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 75 days to maturity, Celosia needs the indoor head start that Oregon's growing season requires. Starting indoors ensures you have strong transplants ready the moment outdoor conditions are right.

Celosia requires full sun (6-8 hours) and moderate (1 inch/week) moisture. The Pacific Northwest's cool, wet springs delay soil warm-up; raised beds and black plastic mulch help jump-start the season.

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 Oregon.