I put some down which wasn’t more than 2 months old in November on our rhubarb patch and the surrounding comfrey plants. Both are already starting to grow visible shoots as of 6th February 2014.
So I guess you could put some of it down if you have a rhubarb bed??
The other thing I’ve done is put it around the hedge surrounds where weeds were growing and to date, 3 months in, we’ve got no new weeds appearing.
All the rest is still rotting down in a 1 metre cubed open compost bin.