Yes, it is possible. In Quebec, in fact, the data shows that approximately 50% of corn and soybean crops are grown using treated seeds. That means 50% of seeds are not treated. As I said, further to its agricultural pesticide strategy for 2015-18, the Quebec government intends to provide incentives so that farmers can access untreated seeds. They are available on the market.
On March 9th, 2017. See this statement in context.