Lettuce Summer Crisp Muir is a distinguished Batavian variety engineered for exceptional warm-season performance, delivering reliable production when heat challenges conventional lettuce cultivation. This organic, non-GMO, open-pollinated variety produces densely formed closed heads with characteristically light green, extra-wavy foliage that creates visually appealing plants while providing substantial leaf mass for generous harvests. The distinctive leaf texture contributes to the exceptional crispness that defines Muir's culinary appeal. Muir's heat tolerance is its defining strength, enabling consistent production throughout spring and summer months when gardeners typically face lettuce scarcity. The slow bolting tendency dramatically extends your productive harvest window, allowing weeks of continuous picking before plants transition to flowering. This extended productivity makes Muir exceptionally valuable for regions with warm climates or for gardeners seeking uninterrupted lettuce availability across multiple seasons. The variety's versatility extends beyond traditional soil cultivation. Muir performs exceptionally well in hydroponic systems, making it ideal for controlled-environment agriculture and innovative growing techniques. The dense head structure supports both early harvesting of tender young plants and full maturation for maximum yield, providing flexibility in harvest timing and management strategies. Expect mature heads in approximately 50 days under favorable conditions, with organic seed germination rates around 80%, ensuring reliable establishment. The open-pollinated genetics enable seed saving, allowing you to perpetuate superior plants across multiple seasons. With 50 seeds per packet, organic certification, and our commitment to sustainable, non-GMO cultivation and environmentally responsible packaging, Muir offers comprehensive value for gardeners seeking resilient, flavorful summer lettuce production in diverse growing environments.

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David’s Garden Seeds is a Veteran owned business that has been offering quality lettuce seeds since 2009.

David's Garden Seeds® is a member of the GO TEXAN agriculture program.

We cannot possibly put all the directions you need for growing summer crisp lettuce in your area on the seed package. We recommend that you read articles or check with other gardeners in your area.

These are also open pollinated meaning they will reproduce themselves. While all heirlooms are open pollinated not all open pollinated seeds are heirlooms.

Freshly Packed: These lettuce seeds are packed for the current growing season and will provide high germination rates next year as well.