Violet, and Solidago (goldenrod,) are almost certainly native. Pokeweed definitely is. All are integral parts of the local native ecosystem as food sources for various insects, butterflies (&/or their caterpillars,) and birds. IMVHO, all 3 are fine looking plants. Their value as ornamentals or to perform other functions in a garden is purely up to the gardener.
Violets make cleistogamous blooms and can't be controlled in regard to seedling avoidance by deadheading. Young seedlings are not difficult to pull but can be numerous. If one isn't going to be diligent about pulling sprouts, you'll eventually have a ground cover of violets in both flower beds and lawn. Host plant for some fritillary butterfly caterpillars.
If deadheaded, goldenrod won't drop seeds and cause a rash of sprouts. That can be a way to cultivate its' value as a nectar source for various butterflies while avoiding a weeding task for yourself later. When the yellow flowers turn brown, cut the whole top off, or cut the plant off near the soil level. 3 seconds.
Pokeweed berries are valued by several kinds of birds. If none come along to eat them before they start to fall on the ground, removing them would take just a minute or 2, by either cutting off just the berries or by taking the whole plant down with one quick slice of the main trunk near ground level. That won't kill it but there won't be more berries until the same time next year. Unwanted young seedlings are easy to pull until their 2nd or 3rd year, and boiling water poured on an older, established root will kill it if it seems too deep to dig up. I would welcome a few but the very few seedlings I've seen have had a hard time establishing. Invariably every summer at some point during the brutal heat, there's a solid month of no rain. None of the sprouts have ever survived this. When I see pokeweed plants while out in the woods, in parks, nature preserves, they are almost always lone individuals.
http://georgiawildlife.com/nod...
Knowing what to expect makes it easier I think to decide which plants one wants to consider having around and how to prevent having too many of them.
