We always used grass mowings in between the rows of spuds, Jambop.Great for retaining moisture, and as they rot down, they keep weeds down too!Never saw a problem with seed - during that year anyway!
Avoid doing so if the grass already has seed heads, of course
The general advice is not to add lime at the same time as manure, I think.
Started by Ian_P on Grow Your Own
Started by chopkins1313 on Grow Your Own
Started by Baz on Grow Your Own
Started by kentishgal on Grow Your Own