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Remove Crocosmia

Can anyone help i have 2 acres of garen with an awful lot of Crocosmia growing in it. I have tried to get rid of it with no joy it grows back stronger than ever.

How can i kill / remove the crocosmia so that my other plants can thrive?



  • Hi Manxlad, I have just found out that I have the same, I'm going to dig up the corms and see what happens.... It's unreal and growing just everywhere! I'll let you know how I get on ... But I think now is the right time to do it before it starts really comng to life in the spring.
  • donutsmrsdonutsmrs Posts: 479

    I had a lot of Crocosmia that had to go due to the garden being altered. Mine was only a small amount but I dug the corms up, saved some of  them and put them in pots. We did put Round Up on the ones that were left as they continued to grow and that seemed to help a lot. Where my crocosmia were, we have made our driveway larger so concrete works a treat. image

  • Does the round up not effect the other plants or the soil?
  • Some plants are just so invasive.    I had the same problem with crocosmia, and found it was just a case of keep at it.    Eventually I had taken enough corms up and confined it to a clump.    More do keep coming up, though, but after rain I find it quite easy to simply pull them out where I do not want them.     I also have the same problem with muscari or grape hyacinth.    I have been removing these from part of my garden now for a good two years, but there are still plenty there.   Perhaps another year of pulling them out, digging them out, etc., wuill do the trick, if I am lucky!

  • donutsmrsdonutsmrs Posts: 479

    Manxlad, my Crocosmia were in a bed on their own, so I had no problem with other plants which made the job a little easier.

  • Any one who plants this plant and day lillies must be crazy. They a a pain in the butt!!!


  • I'm one of the crazy ones, then, because I like both plants, though one does have to keep on top of them.

    Manxlad, Roundup does not affect the soil. It can be applied to single plants by cutting them down and pouring Roundup into the stem or by using Roundup gel, but you do have to be careful. I use it on plants that come  up through my tarmac drive, such as alstroemeria, which is also pretty invasive, and they are always close to the borders and other plants.

  • Don't know if it is true, but I read once that wild montbretia is one of the plants that must not sent for council composting or other disposal, along with plants like Japanese Knotweed.. Presumably, it must be burnt to dispose of it. I have it (montbretia) in my garden but have managed to get rid of most of it. The named cultivars are nice, though, especially Lucifer, I think.

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