You can cut them back to a pair of decent leaf joints, anywhere on the plant. New growth sprouts all along the main stem. The higher you cut, the taller the eventual plant will be, so it depends on location.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
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New growth sprouts all along the main stem. The higher you cut, the taller the eventual plant will be, so it depends on location.
I live in west central Scotland - not where that photo is...