yes they will flower next year. if you want to keep them in the pots let them die back. in the spring cut down all the dead stems. you will see new growth at compost level. replace some of the compost with fresh and slow release fertilizer. keep watered and they will form buds july onwards.
I often put them straight into the ground after the spring so they grow away in the garden. flowering about now. October is the more natural flowering time for them.

welcome to GoY too

I just pop them in ground right now. They will naturalize before winter arrives & grow again in the spring. Give them a light trim in June/July. This will cause more flowers that won't flop over. Needs a sunny location with rich moist soil.

Thank you for your welcome to the site and for helping me really appreciate it ?