Do I do anything with these now?

in Plants
i have a couple of little chrysanthemums I bought earlier in the year they are in the ground do I dead head them or cut them down now? Also a Persicaria (?) in a pot that’s looking very tatty/dead?




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Can't help with chrysanths as I don't grow them.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
I live in west central Scotland - not where that photo is...