14 to 16 days"possibly 21 days if growing to baby green stage. Plant heavy and start harvest early for baby greens then allow some to grow on for plenty of variety for salads. A great way to get a lot out of little space. This mixture of lettuce varieties may take up to 35 to 70 days. This packet contains a mixture of favorite lettuce varieties from across the spectrum of lettuce types. Approx. 16,000 seeds/oz.