Not a good plant for a postage stamp garden. If she prunes it back hard it will just grow back. Enjoy the flowers and then dig up and plant something more suitable is what I would advise.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
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Isn't that the name of a song?
#I've got big buds and I cannot lie...
Depends on what buds we're referring to.....
It's a monster,apparently @Obelixx. Still, she's working from home so plenty of time to get rid.