In the surroundings of Colmar not only do you have market places and direct sales at farms, but you can also visit stores offering organic products. There's the coop Sonnenbluem on rue du Grillenbreit in Colmar, Nature et Santé in Colmar Houssen or Colmar Erlen, and Unis vers Bio in Ingersheim which is only 3 minutes away from Katzenthal.
Is consuming organic produce really much more expensive ? It is true that the cost of organic production is augmented due to the fact that organic agriculture is much less intense, handling organic produce takes more time and care, and space and manual labor requirements are greater. However, high prices can be avoided by purchasing products that are in season, nearby, and using less packaging. Consumming organic produce protects the environement (conventional agriculture does not integrate the cost of environmental pollution and degradation into the price), favors biodiversity, and respects natural cycles.