To be certified organic, seeds cannot be genetically modified, and must come from an organic parent plant that was grown in a U.S. Department of Agriculture-certified organic farm. The parent plant also must be grown in organic soil using only approved fertilizers and pest controls.
Organically grown seeds are developed for organic systems, therefore they are better suited to organic growing conditions. Additionally, organically grown seeds do not use agricultural chemicals, which can change the genetic makeup of the seeds.
There are seed companies that specialize and sell organic seeds only, and others that have added organic seeds to their merchandise. The prices of organic seeds are higher, which covers the costs associated with increased oversight and compliance, and the fact that there are fewer organic seeds available.