If you used fresh compost for the plant it is probably rich enough to supprt the plant for the time being. You don't need to feed it now, just water it well (... don't drown it though... ). It will probably make new leafy shoots from the branches where you snip off the flowers. But you don't want these new shoots to come up too fast, or they will be too soft and sappy, and will not get tough enough to pass the winter. I'd leave it be, or just give it a little bit of balanced fertilizer as Verdun says. And a slow release fertilizer like hoof and horn in winter (the hoof and horn will break down in the soil through the winter, and be ready for slurping it up when the plant wakes up next spring).
"Specialized" forcing feeds like used in commeercial greenhouses to get showy pot plants for sale are not necessary for garden plants, in general
Posts
If you used fresh compost for the plant it is probably rich enough to supprt the plant for the time being. You don't need to feed it now, just water it well (... don't drown it though...
). It will probably make new leafy shoots from the branches where you snip off the flowers. But you don't want these new shoots to come up too fast, or they will be too soft and sappy, and will not get tough enough to pass the winter. I'd leave it be, or just give it a little bit of balanced fertilizer as Verdun says. And a slow release fertilizer like hoof and horn in winter (the hoof and horn will break down in the soil through the winter, and be ready for slurping it up when the plant wakes up next spring).
"Specialized" forcing feeds like used in commeercial greenhouses to get showy pot plants for sale are not necessary for garden plants, in general