Is this a thistle?
Jay 6a Chicago
4 years ago
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Jay 6a Chicago
4 years agolast modified: 4 years agoRelated Discussions
Ornamental Thistles & Other Prickly Perennials
Comments (20)Just in case anyone else reads these comments: Echinops tienschanicum is totally hardy for me here in west central Minnesota. So, it is hardier than many books and websites say. They are large, imposing plants but extremely beautiful and very attractive to both humans and pollinators. The flower heads really are tennis ball sized on this Echinops, and are a gorgeous blue colour. This plant can reach 7 feet or more but is usually a bit shorter, though not much! I grew mine from seed and love these plants, since they are so huge and so very attractive to my pollinating insect friends in the garden. There are several different Echinops that people like to grow in their gardens, but this one is by far the tallest and has the largest flowers. Happy growing and gardening to all!...See MoreCanadian Thistle Help Please
Comments (21)We got Canadian thistle under control glyphosate (studies that do not have friends of Monsanto involved or other conflicts of interest show it as 'carcinogenic' or 'probably carcinogenic' - it just wasn't worth the risk to my loved ones and neighbours). We moved into our house 5 years ago - 100' x 50', so the thistle seemed to take over our little yard. It was a nightmare. They grew in hardpan here, so pulling up WITH their roots is literally impossible without heavy equipment (the roots supposedly can grow up to 20' down). Here's what we tried: 1) On advice from experts we tried cutting them back when they were still young. They kept growing back, and more - probably from the roots getting stronger. 2) On advice from more experts we tried cutting them down just before flowering - the theory being that all their energy goes into flowering and they will eventually die this way. They kept growing back. Options 1 and 2 were very time-consuming and only a band-aid to the problem, so I tried number 3: 3) I did extensive research and found that the USDA did a study in 2002 and found that 20% vinegar (acetic acid) killed 80-100% of Canada thistle. So we sprayed them - young/small and old/large. I even tracked some that I sprayed to see if they regrew from the same roots, and those did not. For the really large ones (3-ish ft tall), I cut them back to 6" or less, then sprayed. Needed to hit them a few times because their root systems are probably very strong. I even sprayed a 3' tall one through the fence, in the neighbour's yard, and it worked - that one surprised me! For the first 2 years, we had to spray all summer because there were so many. Now we only need to spray weedlings occasionally - mostly in the hottest part of summer. Most of our neighbours still have a problem with them - they either don't spray with acetic vinegar or only spray after they have a lot of mature thistles. Canada thistle is now my least problematic weed. Still haven't gotten those dandelions under control, and oh, the horsetail weed! I know this is an old thread, but hope this helps anyone who finds it in search of help for this tenacious weed....See MoreIs this a thistle?
Comments (6)If this is a native thistle, such as C. discolor or altissimum, it probably has leaves that are white from dense hairs on the bottom surface. The non-native, trash species like C. vulgare and C. arvense tend to be green underneath. Those two should be discarded before they bloom. Maybe someone else has experience with transplanting. If not, then you might check the following article for information: https://xerces.org/wp-content/uploads/2016/10/2016-029_Native-Thistle-Conservation-Guidelines_FINAL_web.pdf. The few mature plants that I've dug have very large taproots that tend to turn, laterally, just a few inches under the surface. Their roots are complex enough that digging is very difficult. But I don't know if one as young as yours will be so difficult to move. I really like the native thistles. They have interesting flowers, and aren't nearly as thorny as most of the non-native species. They also tend to be much less invasive....See MoreIs this a thistle or something fabulous?
Comments (4)I'm not very good at this, but I do wonder if it could be an oriental poppy. What zone are you in? Have you seen anything flowering here previous years?...See MoreJay 6a Chicago
4 years agoJay 6a Chicago
4 years agolast modified: 4 years agoJay 6a Chicago
4 years agoJay 6a Chicago
4 years agoJay 6a Chicago
4 years agolast modified: 4 years agoJay 6a Chicago
4 years ago
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peren.all Zone 5a Ontario Canada