November 15, 2010 at 12:17 pm #253711
I think I read somewhere that a border of comfrey mass planted will form a barrier against kikuyu. Is this true/possible?
Any advice/thoughts/opinions much appreciated.
MareeNovember 15, 2010 at 12:49 pm #482535
Schumannator, I am not sure about that but might give it a go as I have a ton of Kikuyu that loves the veggie garden. Currently, I have a trial of Cypress Pine needles bordering a part of the veggie garden to see if an annual application of them will stop the kikuyu runners from venturing where they are not wanted. Keep you posted, cheers porgey.November 15, 2010 at 1:08 pm #482536
Well, my comfrey grows through the grass and the grass stays right up to the comfrey plant when it grows larger so I would say it’s not really true. :angry:November 15, 2010 at 1:24 pm #482537
I haven’t heard that one but I’m trying lemon grass clumps then I can cut them for mulch.November 15, 2010 at 8:18 pm #482538
I have not tried either. Given my observations of grass and comfrey no it wouldnt. If you have a wide border it might stop other ground covers from invading but not those that have long underground runners like KiKuyu, I have pulled up 5 m plus runners on the farm so if there is something good they will be after it.
I have heard suggested Vetiver Grass and Lemon Grass, these work as the roots are a very thick deep mat rather than a single thick one as per comfrey.
I tend to used a trench filled with street tree prunings, every 3-4 months I just dig/fork out the mulch, pull out the runners, easy, then replace the woodchips.November 15, 2010 at 10:03 pm #482539
I recall visiting a friend in New Zealand who owns an organic farm selling vegies and herbs to local markets and restaurants. I was intrigued by the canna lilies growing everywhere, so I asked why? He told me he’d imported them specially from Japan at great cost, because this particular canna variety was reputed to be a sure-fire barrier against kikuyu. “Does it work”, I asked. He said, “Nope. The bloody kikuyu grows straight through it.” I suggested he might find an outlet for organically grown sprays of canna flowers, but he wasn’t real hopeful about that.November 16, 2010 at 1:03 am #482540
I grow comfrey as instant mulch and compost activator in my citrus grove and the kikuyu grows straight through, under and around it. Comfrey’s still wonderful though.November 16, 2010 at 8:54 am #482541
Thanks a lot, Everyone. Sounded too good to be true. I guess it will have to be solarisation – I hate, really hate kikuyu!
MareeNovember 16, 2010 at 10:12 am #482542
Yep, I have a thick row of comfrey along long stretch of my vegie garden fence and it gets past and/or under.
However, I’ve heard that a thick row of comfrey AND a thick row of lemon grass should do the trick. Maybe I’ll try that elsewhere.
Kikuyu is amazing stuff. After all the rain we’ve had lately, it is looking green and beautiful as a lawn, but try keep it out of something and “it’s a battle”…November 17, 2010 at 1:05 pm #482543
Unfortunately my limited experience indicates that kikuyu runners can travel up to 30m underground before popping up for a photosynthetic breather so am not sure that a vegetative barrier would be much use unless it is very, very thick.
As an aside, kikuyu mines potassium, so if you have apple trees, try to avoid having kikuyu anywhere near them as this grass seriously affects apple yields.
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