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Post new topic   Reply to topic    Irish Gardeners Forum Home -> Vegetable growing, fruit and allotments in Ireland

Japanese Knot Weed Fertiliser


 
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Blowin
Rank attained: Vegetable garden tender


Joined: 20 Aug 2008
Posts: 901
Location: Drimoleague, Co Cork

PostPosted: Sun Mar 11, 2012 6:59 pm    Post subject: Japanese Knot Weed Fertiliser Reply with quote

I've read that spuds are one of the crops that prefers an acid soil.

Somewhere recently I read that someone had tried eating Japanese Knot Weed and found it to be quite similar to rhubarb, i.e. presumably acidic, so it occurred to me that, providing I made sure there were no roots or seeds, and I chopped it up very small, is it likely to make good fertiliser? I do actually have a garden shredder which would make things easy.

Of course, at this time of year, all there is is last year's dead stalks and I'm wondering whether any of those with scientific knowledge could tell me if any of the acid is likely to still be present in them? That is, would they be usable to enhance the soil?

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ian
Rank attained: Ash Tree
Rank attained: Ash Tree


Joined: 22 Jun 2007
Posts: 237
Location: Tallaght

PostPosted: Sun Mar 11, 2012 7:33 pm    Post subject: Reply with quote

you can always do avery simple litmus test yourself and get an answer to your query.
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Seedling
Rank attained: Hazel Tree
Rank attained: Hazel Tree


Joined: 28 Feb 2011
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Location: Cork

PostPosted: Mon Mar 12, 2012 9:27 am    Post subject: Reply with quote

This is highly inadvisable. Japanese knotweed is an agressive invasive species that can regenerate from very small fragments of the parent plant not just seeds or plants. Once it has established, it is extremly difficult and expensive to eradicate. This could potentail pose you hige problems and I would definitely advise against it. It may even be illegal? But I am not sure

See http://invasivespeciesireland.com/
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simonj
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Joined: 12 May 2010
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Location: Connemara

PostPosted: Tue Mar 13, 2012 1:35 am    Post subject: Reply with quote

Japanese knotweed!!!! That is absolutely the last thing I would ever use, eradicate at all costs more like it.
Kill it - kill it - kill it

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Last edited by simonj on Mon Mar 26, 2012 10:52 am; edited 1 time in total
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tippben
Rank attained: Vegetable garden tender


Joined: 15 Jan 2011
Posts: 921
Location: north tipperary

PostPosted: Tue Mar 13, 2012 8:12 am    Post subject: Reply with quote

Yep, it is illegal to plant it, allow it to spread, or introduce it to a new area. In addition, it can grow from any small bit of stem. Shredding it up is a recipe for disaster! I have tried cooking it like rhubarb, and yes, it is edible, but tastes so disgusting that you'd have to be starving to bother.
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Blowin
Rank attained: Vegetable garden tender


Joined: 20 Aug 2008
Posts: 901
Location: Drimoleague, Co Cork

PostPosted: Tue Mar 13, 2012 4:08 pm    Post subject: Reply with quote

Thanks All. That's one for Room 101.
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ceathru
Rank attained: Hazel Tree
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Joined: 17 Mar 2011
Posts: 5
Location: Co. Kerry

PostPosted: Sun Mar 25, 2012 9:20 pm    Post subject: Reply with quote

Two years ago six bottles of Knotwine out of some of the Japanese Knotweed by which I'm surrounded. It was DELICIOUS, so much so that I've picked and frozen a whole heap of knotweed this year, enough for about 18 bottles of the stuff. If you want to give it a whirl, just google Japanese Knotweed Wine. Plenty of recipes out there!
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