Dwarf rhododendron makes a giant impact when flowering
ONE of the most reliable dwarf rhododendrons for copious flowering is Rhododendron pemakoense. The flowers are very frost tender even in developing bud, so could struggle to perform in the colder parts of Central Otago. In milder areas though, even from a young age, plants with only a few shoots will produce relatively large pink flowers.
By maturity, the plant can smother itself in blooms which, depending on the form, can range through pink and pinkishpurple to purple. Growing to 30cm60cm, in full flower the plant stands out as an eyecatching splash of colour among the spread of other ground level plants in the garden.
The genus Rhododendron has more than 50 subsections containing more closelyrelated species. Closer inspection of individual florets on R. pemakoense reveals they are covered in minute hairs, which is a distinctive feature of subsection Uniflora to which it belongs.
In the wild, R. pemakoense grows in the mountains of east Arunachal Pradesh and southeast Xizang. It not only spreads by seed, but can also send out runners to carpet steep mossclad rocks and slopes at altitudes between 3000m and 3700m. In the Rhododendron Dell at Dunedin Botanic Garden, its home is the peat garden, where it enjoys the moist freedraining conditions it needs to thrive.
The peat garden also contains several other dwarf rhododendron species in flower at the moment. It is well worth taking the time to look around them all and observe how their size does not limit their diversity.
Garden Life is produced by Dunedin Botanic Garden. For further information contact Doug Thomson.