NT wrote:
On Jun 7, 8:57 am, Chris J Dixon wrote:
Having just extended a flower bed to incorporate what has been
lawn for 40 years, I am left with some pretty solid clay soil.

Gypsum is recommended as a soil improver, but appears to be sold
in garden centres as a proprietary product costing nearly 5 for
2.5 kg.

http://www.capitalgardens.co.uk/clay...itioner-p-6321....

On the other hand, I can pick up a 25 kg bag of multi-finish
plaster for under 5, and AFAIK this is essentially the same
material.

Any reasons not to go with plaster?

Chris


Building plaster has other stuff in it besides gypsum, anyone know
what those additives are?


filler mainly. Mica and so on. that's yer carlite bonding anyway.

The finishing plaster is almost pure gypsum IIRC.



NT