🌿 Can I Plant Oregano in Seattle, WA?
Temperature conditions are suitable for Oregano. Highs near 92°F are on the warm side — make sure plants have plenty of water.
Growing Oregano in Seattle
Seattle's Zone 8b maritime climate is notoriously cool and cloudy, which means warm-season crops like tomatoes and peppers need all the help they can get. A south-facing wall or greenhouse extension is almost essential for tomatoes. On the plus side, cool-season crops like kale, lettuce, and peas absolutely thrive in Seattle's mild, moist conditions.
In Seattle (last frost around March 18), oregano can go out around March — approximately 2 weeks before the last expected frost, making it an early-season opportunity. Starting seeds indoors 8 weeks before the last frost date gives you a significant head start.
Oregano thrives between 55°F and 85°F. It tolerates temperatures as low as 28°F, making it a candidate for early spring planting before the last frost date. Expect 60–90 days from transplant to first harvest. Perennial herb. Flavor intensifies in warm dry weather.
Frequently Asked Questions
When can I plant oregano in Seattle, WA?
In Seattle (last frost around March 18), oregano can go out around March — approximately 2 weeks before the last expected frost, making it an early-season opportunity. For best results, start seeds indoors 8 weeks before that — giving you strong transplants ready to go out at the right time.
What is the USDA hardiness zone for Seattle?
Seattle, WA is in USDA Plant Hardiness Zone 8b. The last expected spring frost is around March 18, and the first fall frost arrives around November 15. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.
Is it safe to plant oregano outside in Seattle right now?
That depends on the current weather forecast. Oregano needs temperatures above 28°F (ideally 55–85°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.
Can I grow oregano in Seattle 2026?
Yes — Oregano grows well in Seattle, WA. With a Zone 8b climate and a growing season of ~242 days, Seattle is well-suited for cool-season crops like oregano. As a frost-tolerant crop, oregano can even go out a few weeks before the last frost date.
Grow Oregano in Other Cities
Get a live answer for your exact address
Enter your ZIP code — CanIPlant checks your real 7-day forecast, frost alerts, and 30-year climate data to tell you whether to plant oregano right now.
Check My ZIP Code →