Asclepias speciosa

A stunning perennial with soft silky white foliage and showy heads of intricate rosy flowers. This has a long history of cultivation in the UK and is fully hardy, so its rarity here is a mystery. 

In the wild it is found on both dry poor soils and moist marginal conditions so should be highly adaptable. It does however need plenty of sun. It's only disadvantage perhaps is that it runs about pretty freely underground, so best with other vigorous hardy perennials and low shrubs. 

At the nursery it is competing with another vigorous spreader - Euphorbia sikkimensis. 

£16