Crambe cordifolia

This wonderful member of the brassica family is a highly sought after, majestic, hardy perennial that forms a thick rhizomatous base.  Large splayed flower-heads, resembling a giant gypsophila appear from late Spring.  The flowers have a gorgeous honey-like fragrance and are perfect for bouquets.  Attracts beneficial insects.  Full sun, well-drained soil.  Watch for slugs and snails and white butterfly caterpillars (the latter in summer).  1.5-2m (in flower) x 1m approx.