1 Thalictrum ‘Black Stockings’ A useful early season accompaniment to Iris sibirica and astrantias. “The dark stems of this cultivar make it more telling than the species,” says Tom. 2m x 75cm. AGM*. RHS H7, USDA 5a-9b† .
2 ‘Stella’ A low-growing bellflower that Tom uses extensively with to colonise the cracks in the rocks. But he warns, it is very prolific.
