Concept Summer Crisp Lettuce is a cross between both romaine and leaf types featuring nicely ruffled exterior wrapping leaves that uniformly fold into a well formed open vase shaped rosette. Robust bright green thick leaves are sweetly flavored without any bitter bite, juicy and have a crisp texture with just the right amount of crunch. Excellent for adding heft to salads or topping a burger or sandwich, this variety is versatile. Notably heat tolerant and slow to bolt, Concept Summer Crisp is a great summer time field production crop for fresh market growers. 50 days. Packet: 250 seeds.