Plant I might also be prostrate rosemary, depending on where you are (hardy to zone 7.) Rub the leaves lightly and sniff your fingers; rosemary's scent is distinctive and I find it lovely. I am pretty sure that Plant C isn't Polygonum. It looks to me like one of the wild goldenrods. If it has fuzzy stems and leaves it's rough goldenrod, if it's smooth, most probably Canada goldenrod. They seed around pretty prolifically and will also spread by runners, so you probably want to get rid of this. Several of the others you will probably want to remove: the barberry which in the eastern and midwestern parts of the country are seeded by birds into the wilder areas and is quite prickery; the oriental bittersweet which will also seed invasively (thanks to the birds) in many parts of the country and is perfectly able to strangle and pull down large trees; your tree seedling unless you want a tree there since the bigger they get the more work they are to remove. The artemesia should have a large bottomless pot or other barrier around it unless you want to constantly be battling with it to prevent it from smothering other plants and taking over your garden. You should religiously deadhead (cut off old blossoms) from the lemon balm as soon as possible after blooming because this plant will seed prolifically and you will have to be constantly pulling it out of other plants, the lawn, etc. Just thought I'd give you some warning to prevent some of the problems I am now dealing with on my property.

Mike, Invasive isn't on your property. I think you have the words invasive and aggressive mixed up. Something that might be aggressive would re-seed on your own property. When the seeds are blown or deposited by animals elsewhere, and those plants then overtake our native flora, they have escaped from cultivation. It would then be considered an invasive plant, ie burning bush and butterfly bush. I know a woman in IL who has barberry and burning bush in her woods. They came from the neighbors property. They sure weren't planted there. I had a barberry show up on the side of our house. I never planted a barberry. But up the road, yes, up the road, they have 3 plants. If the plant is on your states invasive list, it's the responsible thing to do and not plant it. Just because a nursery can sell the darn things a dime a dozen, doesn't mean the nursery is doing a good thing. In fact, the green industry is always sent a list of things that are considered invasive for your state. If said nursery sells the plant, they are selling some unsuspecting person an invasive plant. They aren't a good nursery if they willing and knowingly sell a plant that is on your states invasive/noxious weed list. You also don't say what kind of ivy. Poison Ivy? Boston Ivy? English Ivy? Here's one of many definitions of invasive. # invasive An introduced (non-native) plant that disrupts the local ecosystem and isn't checked by climate, grazing, or other natural means. Extreme examples include kudzu vine (Pueraria lobata), which can grow 35 feet in one season and which the American Horticultural Society's A-Z Encyclopedia of Garden Plants calls "the vine that ate the South". The following link is to your states list of invasive plants. I would also suggest you copy and paste the link Lori gave and read it. Quoted from the below link also says; This list of invasive species is not meant to be definitive, but rather a guideline to some of the most troublesome species that degrade native plant communities in Pennsylvania. These species were chosen from a more extensive list compiled from adjacent state or regional lists of invasive plant species. Input was sought from experienced individuals familiar with Pennsylvania's flora from a field perspective. For a more extensive list of invasive species, please contact DCNR, Bureau of Forestry, P.O. Box 8552, Harrisburg, PA 17105-8552 Here is a link that might be useful: invasive plants in PA

Maybe if you present a pic. of the remaining plant showing the base of the plant and the leaves someone might be able to take a guess at the type of orchid you have. The numbers: 30,000 orchid species 100,000 registered orchid hybrids Many orchid species from Central America.

Berggarten, I guess. I am an atrocious speller and too lazy to look everything up. Sorry. My garden sage lived through 7" of rain in a 12 month period without rain in 2011. Last year it went from Memorial day to Halloween without 1 drop and a passel of 100F days in Central Texas. This time They went 2.5 months between rainstorms with temps in the upper 90's and 100. True they are not in clay and their roots have grown deep in their search for water. They are very happy.