Posted: 05/08/2015 at 12:04
Perovskia is nice but....it flops, gets straggly and is generally untidy. Had it but replaced it. Certainly not for a formal border. In the gc perovskia looks tidy but once outside in the wind and rain it needs support. However,,there is a smaller variety, Little Spire, that is supppsed to be better.
santolina has a few varieties.....however, trim it twice a year and it will be beautifully controlled. I cut mine back very hard in early spring but trimmed by half at that time will provide dense,,compact, silver/grey mounds.
Easily propagated by cuttings too