Return to the Hosta Forum | Post a Follow-Up

 o
we love hostas-but-do you have an invasive one?

Posted by hostaLes 5 (My Page) on
Sun, Jun 3, 12 at 8:15

I don't have one thatI feel is invasive yet, so I can't post a photo. Will Stiletto be?
Photobucket

I'd added one last year. And H. clausa is listed as stoloniferous. Can mine become invasive?

unknown Hosta#2 fall 2011

H. clausa var. normalis

Do you have any hostas that you wish you hadn't added because they have become invasive?

Les


Follow-Up Postings:

 o
RE: we love hostas-but-do you have an invasive one?

my clausa squared ... clausa var clausa is about 8 by 8 FEET ...

has swallowed 6 or 8 surrounding hosta ...

and has the most glorious pink and purple flowers

ken


 o
RE: we love hostas-but-do you have an invasive one?

sounds like I can replace one of my Lancifolia floats with clausa. I really love the deep purple flowers, and there are a lot of them.

Les


 o
RE: we love hostas-but-do you have an invasive one?

Undulata! It seems that every landscape that my family came in to contact with had an undulata and it came to me! In my front bed are 8 undulata(but these came from my dead Aunts' house and thankfully they are the good looking ones with three colors) and now that my dad moved to our area he gave me 5 more (not so good looking undulatas plain green and white). I guess this isn't the same though, huh?! ;) I just can't wait til I can "gift" them to someone else!


 o
RE: we love hostas-but-do you have an invasive one?

Les,

Here's a H. clausa var. normalis root from last year. Yes, it was potted, thank goodness, but this gives you an idea of how rhizomatous it can be and how quickly and widely it potentially can spread.

clausa roots

Pieter


 o
RE: we love hostas-but-do you have an invasive one?

Would you rather have clausa spec. normalis (see blossoms in 1st photo) or vinca minor as a ground cover?

Les


 o
RE: we love hostas-but-do you have an invasive one?

I consider August Moon kind of in the "invasive" category in my yard because it is such a fast increaser that I can't keep up with how often it needs to be split so it won't swallow up the hostas next to it. I have it in multiple places because I use it to "tie together" the landscape. When I split it(which is like digging in cement), I plant one with 2-3 eyes and plenty of room between it and the next plant, and two years later it has S P R E A D to 20 eyes and swallowing up everything again! It absolutely thrives on neglect, too! I have given clumps of it to my sister to feed the deer. However, I would NOT consider completely getting rid of it or sorry I got it.


 o
RE: we love hostas-but-do you have an invasive one?

'Rhizomatous'. Such an education I'm getting. Now I have to figure out what good it does to be old and smart.
Christine


 o
RE: we love hostas-but-do you have an invasive one?

Rhizomes are modified stems that run underground, allowing the plant (i.e. H. Clausa) to reproduce itself asexually. Stolons are modified stems that do the same thing but they run above ground. I'm pretty sure that H. Clausa is rhizomatus not stoloniferous.

Steve


 o
RE: we love hostas-but-do you have an invasive one?

I aagree. I couldn't remember which when I did my research on it. Strangely, when I was reading about clausa var. normalis, nothing was included about spreading undergreound (beyond the crown increasing in size) but under clausa var. clausa, I think which doesn't flower, it is mentioned. The other variety of clausa (can't remember the var.) has flowers but they don't open and it is also mentioned it is rhizomatus. So I assumed normalis is also. Steve-help with the three variations please.

Les


 o
RE: we love hostas-but-do you have an invasive one?

Pieter is much more knowledgeable about H. clausa than I am. I don't grow it. This is from the Library.

clausa is a Korean species known in Japan as Tsubomi Giboshi, meaning "closed flower ball ( = bud) hosta." It is also known under the name clausa var. clausa. It occurs in central and northern Korea and is the form with closed flowers. According to Schmid, plants with this form are very rare in the wild. It and clausa var. normalis are basically the same species, although the former is a sterile triploid and the later a fertile diploid.

Steve


 o
RE: we love hostas-but-do you have an invasive one?

Ken, you should send a photo of that to the Hosta Library!

Deanna


 o
RE: we love hostas-but-do you have an invasive one?

I've never met a hosta I'd call invasive as I find them relatively easy to chop back if they are rhizomatous. I do have two that are particularly apt to form disorganized colonies rather than neat clumps... kikutii yakusimensis and Otome No Ka


 o
RE: we love hostas-but-do you have an invasive one?

There are 5 subspecies of clausa, you will find 4 of them in this PDF on the HL and the 5th one is here. I received my original plant as a NOID a number of years ago and initially I thought it might have had 'Lancifolia' on my hands, but the flowers ultimately ended up clinching it. And man, they're purple them flowers! Love 'em!

Hosta clausa var. normalis flower

Pieter


 o
RE: we love hostas-but-do you have an invasive one?

My Clausa spreads pretty well,but it is in an area where it doesn't affect any other hostas. I put it there years ago,to make a ground cover. Stiletto spreads,but I would hardly call it invasive. I kinda like the way it spreads. Phil


 o
RE: we love hostas-but-do you have an invasive one?

Pieter, thanks for your response. I had to laugh because it read just as I would have written mine, confusion with Lancifolia and all. I'd decided mine is H.v. normalis because the flowers open. But now I think I might have your 5th sub-species.
clausa var. normalis, fall 2011 You can decide.

If clausa is normally considered invasibe, I would gladly invade my whole mulberry jungle with it and let it do its thing. (LOL) I love the dense and vivid flowers.

Les


 o
RE: we love hostas-but-do you have an invasive one?hosta freak

Could you post a picture of your spread (pref. in bloom), and maybe a close-up of your clausa hosta freak?

Les


 o
RE: we love hostas-but-do you have an invasive one?

Yellow Splash Rim ! It's in a lot of sun and has a weeping hose buried past it, and I have to carve it to pot up for others every spring.

Better that than the alternative, huh??

hh


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Hosta Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here