Perovskia – Charlton and Blackheath Amateur Horticultural Society

Penstemon ‘Garnet’ – Beardtongue

Although at its peak in July, this has been out since May and is one of the longest-flowering plants in the Old Pond Garden. At the moment we really love it for it’s drought tolerance – no need to water this one! It has dainty, tubular flowers which insects with long tongues like bumblebees can enjoy, and it provides both pollen and nectar for visiting insects. Prefers a sunny spot but will do well in part shade too, so you can spot it in several of the beds. It is a semi-evergreen, only losing it’s leaves in the very depths of winter.

Dianthus carthusianorum – Carthusian Pink

Another lovely drought-tolerant plant that we don’t have to water! It must be in full sun to flower well, so it just loves the gravel garden in the central bed of the Old Pond Garden. It’s a perennial, forming bigger clumps each year and giving that great “pop” of colour. A gentle self-seeder and long season in flower.

Hylotelephium telephium 'Touchdown Teak'

But which is which?

I’m sure you know by now that herb garden favourite rosemary had its botanical name changed following DNA testing. It was reclassified to the Salvia family and its proper name is now Salvia rosmarinus (while the common name of course remains ‘rosemary’). Another common garden plant, Perovskia (aka Russian sage), has been renamed Salvia yangii. And then there are the sedums, some (but not all) of which must have needed a few more syllables to sound properly botanical!

Gardeners often wonder why this happens, and feel like botanical names are simply there to confuse us. Many gardeners choose to stick to the ‘old’ names, and occasionally (but not usually!) this is rewarded as science progresses, as is pointed out in this useful article from Gardens Illustrated.

Tag: Perovskia

What to look out for in the Old Pond Garden July 2025

Penstemon ‘Garnet’ – Beardtongue

Dianthus carthusianorum – Carthusian Pink

Sedum or Hylotelephium? Aster or Symphyotrichum?