Bidens or Dahlia. Any chance of a picture of the stem ends showing terminal buds and a shot from further back showing the whole plant? On balance I'm thinking Bidens alba.

Randi Since of my location/growing zone, my plants have to be inside for a long time. And I am just lucky that I have garden so I can put them outdoors for Summer. Many ppl live in apartments and may not have even a small balcony, and still grow very nice and healthy plants indoors. To prevent lots of etiolation, I use supplemental lights. And I believe that keeping them relatively cool (not freezing) and dry helps to slow down growth during short winter days. Many do not water succulents for extended periods of time, like 2 mo or even longer. But if they are kept warm, they likely keep growing more and need lots of light. Many are dormant during cold months anyways. I do not know how cold is winter in your location, but perhaps plants can overwinter in unheated GH or sunroom?

Jon , a pic of the whole would have been the deciding factor also ,,,a distinct form Garen , I think it's time for a pic update before a camera won't fit in your yard ha , ron

They're violets. Usually Viola riviniana, common Dog Violet, in such situations. A common native which appears as a widespread self sowing weed in gardens but not a disaster. My garden's full of them. I don't think they look like V odorata but you might be lucky. Wait til one flowers and sniff.