Hi Gayle –
In most cases, treated seeds have been coated with some sort of pesticide, fungicide or preservative — chemical or biological — to protect them from soil-borne pathogens or to improve storage-life. Obviously, non-treated seeds have not been processed prior to being packaged.
Treated Seeds
• May yield larger crops
• Improves germination rates
• Chemical treatments have not been shown to produce chemically laced plants
• Are most likely grown using conventional farming practices
• Treatment is applied under controlled conditions
Untreated Seeds
• Clean and chemical-free — often used by organic growers
• Many home gardeners are seeking seed that has not been dosed with pesticides
• Some chemical treatments may be harmful to insects, including bees, that eat pollen from the mature plant
• Reduces our direct exposure to chemicals
• Are most likely grown using environmentally sustainable practices
Happy gardening!