Adapted to heavy, clay soils, Giants of Colmar are standard for winter harvesting. They resist splitting when left in the ground to sweeten. 100 heirloom seeds. Free shipping on orders over $34. "de Colmar" carrots are one of the seven historic genetic regions for carrot production in Europe in the 18th and 19th centuries. The other six historic regional germplasms are Chantenay (known for delicate flavor), Danvers (half size), Nantes (thin, early), Paris Market (globe, winter forcing), Amsterdam (winter forcing) and Berlicumer (large blunt).