Thanks Tee Gee, I am not sure that it is Phacelia fimbriata as the image on Google show a different type of flower. Mine has hundreds of tiny pink daisy like flowers.
I originally had it from a cutting from an old gentleman who warned me that it is very proloific grower. Well it is OK with me, hasn't spread but has just grown bigger and bigger. I love it and last month it was an absolute picture ( but I didn't photograph it in time) Will keep an eye on it next spring and try to get a close up of the flower. Thanks.
