Caryopteris

Over the last 15 years a lot of new varieties of Caryopteris have appeared and where we once grew all there were we no longer can. They all need well drained soil (not Sussex clay) and thrive on chalk. Of the traditional varieties C. x clandonensis ‘Arthur Simmonds’ is the typical pale blue that you expect and it flowers from late July making plants about 1.5m high with long, silvery grey foliage. Compared with this, C.c ‘Heavenly Blue is very similar but the flowers are a slightly deeper blue, and then all the other varieties are much deeper in colour and the foliage is less grey. ‘incana’ is a long established type and is much more compact while ‘Ferndown’ is also compact and starts to flower a month later than all the others. ‘First Choice’, ‘Dark Knight’ and ‘Grand Bleu’ are all larger growers with darker blue flowers.

Yellow foliaged varieties are proliferating – we are currently offering ‘Sunshine Blue’ which is a sport of C. incana so has shorter, broader leaves which are lobed rather than serrate and the flowers are deep blue. The foliage is a true gold rather than the lemony colour of ‘Worcester Gold’, which we could grow if anybody wanted us to. If the hardiness of Caryopteris is an issue for you then ‘Sunshine Blue’ should do better than the C. clandonensis types. This sport arose on a plant we had supplied and has netted good royalties for the nurseryman who noticed it, so keeeeeep looking! 

What is it?

Short notes on items we have only have a few of:

• Dianella nigra has narrower, more upright leaves than D. tasmanica or caerulea but is most distinguished by the showy bright red bases to the rosettes. Flowers and fruit are similar to the others
• Euphorbia characias ‘Portugese Velvet’ is a compact form with soft, almost furry leaves. Good sized flower heads typical of the species.
• Caryopteris clandonensis ‘Ferndown’ is a variety which should be grown in the mix of Caryopteris varieties, as it starts flowering about six weeks after most of the other varieties, thus greatly extending the flowering season.
• The name of Rhus ambigua would not lead one to expect a climber with lobed and trifoliate leaves (not unlike the young growth of Lonicera japonica types). It forms aerial roots, so presumably has self-clinging ability and is noted for its scarlet autumn colour.
• Eccremocarpus scaber is really an annual climber, but it does perenniate and I have seen a thickly woody plant in flower in January. However, even so, it is not long-lived, but in the garden this often goes unnoticed as it freely self seeds. The form we have at the moment has red flowers.