Water retained by various soil ingredients

contact contact@bulbargence.com
Wed, 24 Oct 2012 05:54:58 PDT
Can anyone  explain (to us foreigners) what is ment  by "pumice" and  
"crushed basalt" and  what are the sizes of the particles used for potting 
Kind greetings (sorry for my ignorance)

Lauw de Jager

South of France ( busy potting up bulbs)

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