🥬 Can I Plant Lettuce in Aurora, CO?
Lettuce thrives in cool weather and can be planted now for a fall harvest. Sow seeds soon — they'll be ready around Aug 29–Sep 28, well before the average first frost around Nov 2.
Growing Lettuce in Aurora
Aurora sits at over 5,400 feet in Zone 5b, sharing Denver's challenging high-altitude gardening environment. The growing season is compact — around 150 days — with late spring frosts and early fall cold snaps. High-UV solar radiation speeds plant development but also increases water evaporation from soil. Raised beds, drip irrigation, and careful variety selection for short seasons are keys to success here.
In Aurora (last frost around May 7), lettuce can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity. Starting seeds indoors 4 weeks before the last frost date gives you a significant head start.
Lettuce thrives between 45°F and 65°F. It tolerates temperatures as low as 28°F, making it a candidate for early spring planting before the last frost date. Expect 30–60 days from transplant to first harvest. Cool-season crop. Bolts in heat.
Frequently Asked Questions
When can I plant lettuce in Aurora, CO?
In Aurora (last frost around May 7), lettuce can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity. For best results, start seeds indoors 4 weeks before that — giving you strong transplants ready to go out at the right time.
What is the USDA hardiness zone for Aurora?
Aurora, CO is in USDA Plant Hardiness Zone 5b. The last expected spring frost is around May 7, and the first fall frost arrives around October 4. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.
Is it safe to plant lettuce outside in Aurora right now?
That depends on the current weather forecast. Lettuce needs temperatures above 28°F (ideally 45–65°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 lettuce in Aurora 2026?
Yes — Lettuce grows well in Aurora, CO. With a Zone 5b climate and a growing season of ~150 days, Aurora is well-suited for cool-season crops like lettuce. As a frost-tolerant crop, lettuce can even go out a few weeks before the last frost date.
Grow Lettuce in Other Cities
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