Trailing Plant For Chimneypot
Hi, any suggestions for a trailing plant for my chimney pot. Something perennial, evergreen and long flowering, preferably blue, purple or white. I find it much easier to ask you guy's rather than trailing round the garden centre. I recently visited my local Wyevale garden centre and came away not buying anything ( prices gone sky high and hardly any choice not like it used to be ) might have to start buying online if anyone can give any recommendations. Thanks.. Pot is in full sun.

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Safe from invading the rest of the garden as well.
https://www.google.com/search?q=lysimachia+nummularia+aurea&client=firefox-b&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjR-erO0Z7bAhULBMAKHS0OAO4Q_AUICigB&biw=1920&bih=943
There's diascia and trailing verbena in it at the moment, but I might change it for red thubergia and little trailing petunias whose name begins with K (??)