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Horticultural grit or sharp sand


 
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dormouse
Rank attained: Rowan Tree
Rank attained: Rowan Tree


Joined: 05 Oct 2011
Posts: 140
Location: North Dublin

PostPosted: Tue Feb 21, 2012 10:48 pm    Post subject: Horticultural grit or sharp sand Reply with quote

Hi - I built a capillary watering bench in my tunnel and it is working fine, But I've noticed that the surface of the compost in some of the pots is getting green (algae or moss of some sort??). I was thinking a layer of grit would stop this. Would that be the best thing to do?
But horticultural grit can be pricey so I was also wondering if a thin layer of sharp sand (from builders providers/ DIY store) would suffice?
Thanks a lot.
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michael brenock
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Joined: 12 Aug 2008
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Location: cork

PostPosted: Tue Feb 21, 2012 11:40 pm    Post subject: Reply with quote

you will still have the problem with moss and algae, The grit is probably a larger size than builders sand. Appearances are not always the most important .
michael brenock horticultural advisor (retired)

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dormouse
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PostPosted: Tue Feb 21, 2012 11:54 pm    Post subject: Reply with quote

Thanks Michael. So do you mean the green growth is nothing to worry about? If so, that's good and I can live with it. They are seedlings that will be planted out later.
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Greengage
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PostPosted: Wed Feb 22, 2012 10:24 pm    Post subject: Reply with quote

If you have moss and Algae growing on the top of compost in the pots its not a problem, If you visit any nursery they all have the same problem before selling on they remove the top layer and redress it with fresh compost, dont worry about it.
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dormouse
Rank attained: Rowan Tree
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PostPosted: Thu Feb 23, 2012 7:30 am    Post subject: Reply with quote

Great, thanks a million
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