"Sacha" wrote in message
...
On 17/10/08 21:00, in article , "Pete C"
wrote:
Tonight, Tony Buckland was using horticultural grit on the top of some
pots
of bulbs. What is the difference between this grit and any other
grit/gravel? 
Only a guess - finer/not so fine/no salts.
How much does horticultural grit cost in comparison with the grit i buy for
my hens? £3 for more than I can use in a year, and if you're worried about
what's in it you can put it in a bucket in the bath under the tap and set it
going for an hour or so to rinse it.