On Fri, 09 Aug 2013 22:46:02 GMT, Baz wrote:

Depends a lot on whether it's a hot heap or a cold one, IWHT. I've

measured well over 60 deg C in a hot 'dalek' and grass clippings
reduced to ash.

We are talking about seed, not clippings. Also 60c would not reduce them
to ash, would it? Would that temperature kill seed?

If there was ash I suspect the heap spontanesly caught fire, like
some of the bales of haylidge put out around here for the sheep can
do if the sheep are a bit slow in eating it/breaking the bale apart.

I suspect 60 C is hot enough to kill some seeds but probably not all.
Upper 70's to 80 C probably would make everything non-viable.
--
Cheers
Dave.