A woman I used to work with lived in Kew in a very nice street with a lot of very nice neighbours - included politicians and captains of industry. Her agapanthus bed kept getting raided by plant pirates. She tucked a placard at the back of the bed saying Smile! You're On Candid Camera! Raids stopped. I mean, who nicks agapanthus?
Thanks :) Honestly the whole thing really took off when I put the watering system in (wasn't even expensive). I am now a true believer that regular watering on a timer does wonders.