hi louise i have persiciflolia alba which isnt invasive like some, its the second year and its back and looking lovely but not sprouting up everywhere , just where it was planted,

certainly for the ones you have mentioned, though there are other more well behaved ones. These are easy to weed out though. You could plant them in a pot to restrict them like you would mint.

San, yours are behaving then, good well behaved ones ;-)
Seaburn, thanks for that info, i'll have to keep ontop of them :-/

will keep my eye on them now though just incase lol