- This leek variety is perfect for the beginning gardener as it is hardy, tolerates poor soils, and is low maintenance.
Non-GMO, Open-Pollinated, Heirloom Carentan Leek Seeds from True Leaf Market. Carentan leeks are an excellent addition to dishes that need an extra oniony zest. Tender white stems grow 8.5 inches long and 2 inches wide. Leaves are a medium dark green. Leeks hail from northern Europe, where they are a cherished staple. The Carentan leek came to the United States in the 1800s and became commercially available in the 1880s.