Mo. Rev. Stat. § 150.030

Any farmer residing in this state who shall grow or process any article of farm produce or farm products on his farm is hereby authorized and permitted to vend, retail or wholesale said products, free from license, fee or taxation from any county or municipality, in any quantity he may choose, and by doing so shall not be considered a merchant; provided, he does not have a regular stand or place of business away from his farm; and provided further, that any such produce or products shall not be exempted from such health or police regulations as any community may require.