Methinks you already suspect where you have gone wrong.
Forsythia flowers on old wood ie last years wood.
Try and restrict pruning to immediately after flowering, July is a bit late
as you have found out. It can be a bit of a nuisance leaving the shrub
growing but that is where the latent flower buds are. Jim 2
"Rhiannon Macfie Miller" wrote in message
...
I have a forsythia. Last year it flowered very nicely. I cut it back
sometime around July and it shot back up again -- but now there are no
flower buds on the long new shoots. There are only flowers on new short
side branches from the bits I didn`t cut back. What did I do wrong?

Rhiannon