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18-Aug-2004
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#1 |
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bonsaiTALK Neophyte
Join Date: Sep-2002
Location: Bristol
Country: Great Britain
Posts: 7
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Mixing Your Own Compost
I have been reading up on composts with a view to improve my ‘recipe’ for mixing composts. I can only purchase Pearlite/Cornish grit-/sand/compost/John Innes No.3 where I live so I am thinking of mixing in the following proportions:-
Pearlite-1part Grit-2 parts Sand-1part compost -2 parts OR Pearlite-1part Grit-2 parts Sand-1part compost -1part John Innes No.3 -1 parts I know that the ratios change according to the variety of tree eg. Conifers 70 grit to 30 organic Junipers 60 grit to 40 organic Cotoneasters/Oaks etc. 50 grit to 50 organic I am a bit concerned that the organic ratio to the rest may be a bit small, what do you think? Thanks for your help, Ian Last edited by Ian : 18-Aug-2004 at 05:06 PM. |
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18-Aug-2004
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#2 |
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I stand and stare a lot
 
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Hi Ian
The ratios look ok to me. However, if you are using standard potting compost and/or John Innes, you have to be careful about drainage. These comercially produced composts have a high proportion of fine particles that will compact very quickly. Sifting these composts is very wasteful. From my own experience, you can expect about 10 litres of useable particles (2mm+) from a 60 litre bag. I use composted bark as the organic part of my soils, as the bark takes a good while to break down and the yield pound per pound is much better. It may be worth your while to look up on a previous thread on bonsai soil http://forum.bonsaitalk.com/showthr...ght=john+innes. and http://forum.bonsaitalk.com/showthr...ght=john+innes. There are some good pointers and explains about the importance of particles size in bonsai soil. Hope this helps Mike
__________________
I refuse to have a battle of wits with an unarmed person Last edited by mkonig : 18-Aug-2004 at 07:14 PM. |
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