Are thristles (the weed type) annual or perennial?

Return to the Annuals Forum | Post a Follow-Up

clip this post email this post what is this?
see most clipped and recent clippings

Posted by davemichigan zone 6a (SE Michigan (My Page) on

Tue, Oct 9, 12 at 15:35

The real question is if there is still a point of digging them out right now, or if I can just let the frost/winter kill them?

Follow-Up Postings:

RE: Are thristles (the weed type) annual or perennial?

clip this post email this post what is this?
see most clipped and recent clippings

Posted by rhizo_1 7a AL (My Page) on
Tue, Oct 9, 12 at 16:39

It seems like most thistles are biennial or perennial, depending upon what kind it is. There are also a few annual species.

RE: Are thristles (the weed type) annual or perennial?

clip this post email this post what is this?
see most clipped and recent clippings

Posted by purpleinopp 8b AL (My Page) on
Tue, Oct 9, 12 at 17:11

You probably have Canada thistle (Cirsium arvense) a strangely common-named invasive noxious perennial weed NOT native to Canada or US. A dandelion fork was my preferred tool for evicting those from my yard in OH. As it sounds like you may already know, you need to get the whole taproot or they will grow back, though keeping them mowed can prevent their spread until you are able to deal with those roots. Hope you haven't let the plants make ripe seeds, asking about this so late in the year. Do you have a patch or scattered individuals?

RE: Are thristles (the weed type) annual or perennial?

clip this post email this post what is this?
see most clipped and recent clippings

Posted by ken_adrian z5 (My Page) on
Wed, Oct 10, 12 at 19:18

your problem .. is asking a question .. using a common name .. for example.. the link .. shows there are at least 3 latin names to the group [4???] ... [gotta love the scots wiki.. lol]

first get a proper id..

then you will find your answer ...

usually ... a picture .. here.. or in the NAME THAT PLANT FORUM ... or the perennial .. will get you the ID

ken

Here is a link that might be useful: link

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 Annuals 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.