The tanks @B3 I can see it is kind of spreading so should we just chop out what we don’t want? Do we cut the flower heads off to prevent seeding? Do we take the whole bract off?
Cutting off the bracts will do that. You need to dig out the ones you don't want. They don't go deep. I cut the flower stems down to base. It looks neater
Euphorbia amygdaloides is evergreen @Copperdog, one of the best plants for difficult areas like dry shade. You can remove the flowers when they start to fade but I leave them. The plants are easy to uproot by hand but I let them spread where nothing else thrives as I prefer to see green leaves than dry soil! Just be aware that the milky sap can be a skin irritant to some. Don’t let that put you off, it seems to keep slugs away too!
It's evergreen. Cut the stems when you like but straight after flowering if you don't want it to spread. Don't rub your eyes if you've touched the sap. It's really painful😖
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