Its two desirable features would be it's delicious fragrance, and it's lovely colour in late August, when there is a breathing space in the perennial beds. When we came back at that time of the year after our teaching exchange year in England, the flowers hadn't been watered in about a month. The only blooms to greet us were the Pink Soapwort and the Rudbeckias.
One disadvantage is their tendency to spread quite easily. But their fragrance is a real plus.
