Do not plant

Corydalis heterocarpa..Eupatorium rugosa .. (Chocolate also)... Gooseneck Loosestrife...Petasites Japonica...Lamium galeobdolon .. ranunculus ficaria .. OR Sanicle Marilandica (HE HE HEE)

Why not? Some of those are aggressive in garden settings, true, but many are wonderful native plants here in the mid-Atlantic which are perfectly appropriate in the wild and controllable in the garden. E. rugosum ("chocolate" is just a cultivar) behaves fine for me despite some seeding about and Senna Marilandica is an absolutely stunning border plant that I've had no aggressiveness problems with at all.

My Chocolate E. has reseeded to the point that I rip it out every time I see it and it still comes back and ALL over the place. It is a pretty late blooming perennial but I think it has been worse for me with the reseeding than almost anything else. The Sanicle (it is not senna) is a joke for Equilibrium. I have it all over and don't like it and she LOVES it.

Holy Cow is this site slow. I just lost an entire post I typed out so here goes again.

Busted levilyla! I see that Sanicula marilandica remark ;) Tee he, caught you slipping that in! Yes, the plant might be somewhat agressive out by you however there is no documentation that it is invasive anywhere. Same deal goes for Ageratina altissima formerly known as Eupatorium rugosa. I don't know much about the 'Chocolate' cultivar though. It is a given that Ranunculus ficaria is weedy but then that plant is well documented as being invasive. I've heard that Corydalis heterocarpa, Petasites japonica, and Lamiastrum galeobdolon can all be real nasty but I've never had any personal experience with them. Based on the experiences of others, I don't want to get up close and personal with any of those plants.

Are you sure you are having issues with Gooseneck Loosestrife (Lysimachia atropurpurea) and not one of the introduced Lysimachia spp. or with a Lythrum spp.? I question this because most, if not all, of the North American Lysimachia are either threatened or endangered. There is a Yellow Japanese Loosestrife (Lysimachia clethroides) out there as well as a Large Yellow Japanese Loosestrife (Lysimachia punctata) and a Common Yellow Japanese Loosestrife (Lysimachia vulgaris)and those three are now documented as being highly invasive but the poor little lost and forlorn native Gooseneck Loosestrife ain't bothering nobody.

Common names can be trouble.

Oops, that will teach me to leave the screen up to do something else to come back to press send. You posted while I was getting ready to post. Yes, I LOVE Sanicle. But then consider the source given I love Skunk Cabbage too. They're so purty sitting in the muck looking up to smile at me with all their nice smelliness!

Lysimachia clethroides..(goosneck loosestrife)....E. rugosum.

I had Lysimachia clethroides at our previous house up here. I planted 1 plant. Within the growing season, it was EVERYWHERE!!! It was in the grass, it was in the neighbors grass.....round-up did nothing. It wasn't easy to pull up, you left one itty bitty root behind and the next day it's gone wild. I hate that stuff!

Levilyla,
You could always just cut the dead blooms off your Eupatorium to stop it from seeding everywhere :) Even if it is at the loss of the seedheads, it would be lees work.

Steve

I have it in my yard in a place it doesn't like, and it's very much under control. Plus, I dead-head before it goes to seed.

It blooms at different times and when it's all over, it's kind of hard to keep deadheading. I've really got better things to do than constant deadhead. That that was in the grass got mowed. Didn't seem to mind it all. Just made it spread out even more. I think that was my problem...it LOVED my soil! It's really pretty, but I'll just enjoy in it in someone else's garden.

And it WILL be

I would need some people who actually garden to move in first. And being on a corner lot, with a business behind me......I don't think anybody around here will have it. I've got my fingers crossed anyway. If my husband sees that stuff again, he just might have a coronary!

It's like what my husband says about lamium...it metastasizes in three ways...runners, seeds and roots.

What an appropriate word to use... metastasizes. Great analogy. 5 stars for your husband.

I happily grow Ranunculus ficaria, it's practically the only plant other than Hyacinthoides and grass species which grow in the middle front garden. We have a small collection of cultivars and below is a photo of one of the self sown 'seedlings', a misnomer considering the plant is over 5 years old.

Baa...yours is a different one. (maybe "Double Mud"?) Does it have double burnt yellow flowers? According to Allan Armitage there are a few cultivars that are not as invasive as what I have ... The Lesser Celandine is what I have and I will post a picture later today. I also have Greater Celandine (chelidonium majus) which is all over the place..double blooms and looks very much like the Stylophorum diphyllum.

I'm sorry I'm not familiar with Allan Armitage.

The plant in the picture is an unnamed seedling with yellow flowers, this black and silver pattern is fairly common as are black stripes. 'Double Mud' (leaves in photo but not blooming as yet this year, there's a (poor) photo in the PF which I'm hoping to update) has green leaves and double cream flowers.

Now if I did have a black leaved variety with double orange flowers I'd be very surprised and happy. As far as I'm aware this is not a variation that has been noted as yet.

While the cutivars are slower to grow, the majority of the cultivars were found in the wild or from seedlings occuring in gardens so they are simply forms of the species.

We also have R. ficaria (wild form for want of a better name) in the garden, the cultivars will throw this one too. It also occurs naturally in the area and the variation in the leaves even over a small area is very marked.

I have some blurb about them from the National Collection Holders for Ranunculus ficaria with descriptions of various cultivars although the leaf and to a lesser extent the flower variation can be found in other wild Ranunculus. We grow Chelidonium majus too, again it's another wild flower for us.

Sorry this is a little blurred

Levilyla and Terryr, I hear you on the Gooseneck c.