Acanthus spinosus is an herbaceous perennial. There are other species but this is my favourite as I prefer it's more dissected, thistle-like leaves. A mature clump in flower is an impressive site. Scroll down this board for further details.
Add a froth of gorgeous pink to your border, these are all easy to grow plants, many are perennials so will become the backbone of a good herbaceous border, sow once and reap the benefits both in their beauty and in the pollinators that they bring to your patch. Included are links to the grow guides from growveg.com.
Trollius ledebouri "Lemon Queen" Herbaceous Perennial has lemon-yellow double flowers and a nice compact habit. Sometimes called Buttercups, these grow well in a sunny or part-shaded border, also at the edge of a moist woodland. Flowers will last a few days when cut. Flowering Time Spring, Summer. Sun or Partial Shade. Height 50-60cm (20-24) Spread 45-60cm (18-24") Flowers For Cutting/Drying, Moist Soil, Pest Resistant. Type of garden Cottage Garden, Wildflower Garden, Woodland Garden