Posted: 05/04/2014 at 23:31
Firstly, if you hack this plant down you will not get flowers for 3 years or so. It will also look awful. Forsythias aren't the most shapely anyway.
Secondly, it flowers on wood made last year. So prune flowered wood after flowering.
So, if you prune out the flowered wood every year you will gradually "bushify" your forsythia. Also remove a branch or two every year right down to the ground. In a few years you will have a more compact, younger plant.
for me, secateurs rather than the saw...except for the removal of stems to the ground