Horticultural grit or sharp sand
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dormouse Rank attained: Rowan Tree

Joined: 05 Oct 2011 Posts: 140 Location: North Dublin
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Posted: Tue Feb 21, 2012 10:48 pm Post subject: Horticultural grit or sharp sand |
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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 Rank attained: Chlorophyll for blood
Joined: 12 Aug 2008 Posts: 1275 Location: cork
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Posted: Tue Feb 21, 2012 11:40 pm Post subject: |
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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) _________________ michael brenock |
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dormouse Rank attained: Rowan Tree

Joined: 05 Oct 2011 Posts: 140 Location: North Dublin
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Posted: Tue Feb 21, 2012 11:54 pm Post subject: |
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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 Rank attained: Chlorophyll for blood
Joined: 09 Nov 2011 Posts: 3129 Location: Kildare
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Posted: Wed Feb 22, 2012 10:24 pm Post subject: |
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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

Joined: 05 Oct 2011 Posts: 140 Location: North Dublin
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Posted: Thu Feb 23, 2012 7:30 am Post subject: |
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Great, thanks a million |
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