Product Description L26 – This late variety produces large thight green head with large and numerous leaves. The leaves have pronunced crunchy ribs. This variety is really similar to the iceberg lettuce. Approximate seeds quantity: @3200 seeds. To be sown from March to June and harvest from June to October. Horticultural name: Lactuca sativa L. Reviews 5 Lettuce Great Lakes Posted by Mrs C Lee on 18th Jul 2020 We garden on heavy clay in a North facing garden, but this lettuce has grown quite well, although germination was patchy. Main thing is it tastes great adding a crispy texture to a salad.