Common blue violets (Viola soraria) look fairly harmless when you first see them in a small cluster but they can quickly spread all over your yard and become nearly impossible to get rid of.

The common blue violet will sometimes form tiny, inconspicuous flowers that look simply like buds that haven't bloomed. These flowers are being pollinated, but through self-pollination!

The key to success is quality ingredients; use fresh violet flowers (just the common blue violet) when possible for their ...