OK the actual situation is as follows:
All herbicides are granted a limited life licence
Grazon 90 is going through a revocation notice meaning that I (as an agent) can obtain it upto the end of October 2012. I then have 12 months to sell this product. Grazon 90 will then be revoked in November 2013 and replaced by its newer form called Grazon.
It is only a change in the label and the product will remain the same, but there will probably be a period where Grazon 90 has run out of stock, and the relabelled Grazon is not yet available.
So if you want an un-interrupted stock of Grazon in Spring 2013 I suggest you place your orders now.
From a post above - Although Grazon may have a limited effect on Brambles etc The products that should be used to control woody weeds in Grass are Kaskara and Timbrel as they have a higher concentration of the ingredient Triclopyr which is needed to kill woody weeds with a single application.
Thanks