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from michael contains these words:

I am aware that one should not put lime onto a plot at the same time
as manure,but what is a reasonable interval-3 weeks,3 months?
Also,what is the most cost effective type of lime to use.I am aware
that hydrated lime is expensive,and lowers the pH more,but is it worth
twice the price? At our allotment trading hut,25 kg of hydrated lime
is £7.10,whereas garden lime or ground lime is £3.90.
Cheers,Michael

Hydrated lime is calcium hydroxide, and is fairly caustic. Garden lime
is, I think, ground chalk, calcium carbonate, and is somewhere near
neutral, with a tendency towards alkalinity - in that the calcium/carbon
bond is weak, and stronger acids than carbonic (carbon dioxide dissolved
in water) will replace it.

Go with garden lime, the active constituent (calcium) is
weight-for-weight similar.

--
Rusty
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