The history of the introduction of the Rhododendron family to the western world reads somewhat like the script of an Indiana Jones movie. Devoted horticultural pioneers of the 19th century risked life and limb in the remote mountainous regions of China to seek out desirable species. The British Empire had an endless apetite for Rhododendrons which had to be satisfied! This was no simple Chinese Takeaway. Marauding tribesmen and man-hunting dogs along with pests and diseases were a very real and dangerous threat. We can be grateful that through them we now know of aproximately 900 species of Rhododendron which have been inter-bred to create more than 10,000 hybrids. There is really no excuse for not finding a Rhododendron that apeals.
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Rhododendrons do need consideration as to planting position. They prefer rich deep soil that has an acid ph. Basically this excludes heavy clay or chalky soils. Soil condition can be improved with the addition of peat or bark mulch. Avoid lime. Rhododendrons prefer a little dapled light in the afternoon but can be surprisingly tolerant of sun as long as their roots are kept cool with a nice layer of mulch or compost. The root system is fibrous which means lots of little roots all massed together and near the surface. The good thing about fibrous root systems is it means the plants are easy to move should you wish to give them a ride in your wheelbarrow - something I do far too much of! What else do you need to know? Unfortunately here in New Zealand Rhododendrons are susceptible to damage from a nasty little insect called Thrip. This eats through the top green layer of the leaf leaving it with a silver apearance, when it's done it then goes and hides beneath the leaf. Thrips can easily be controlled by spraying regularly with a systemic chemical insecticide which penetrates through the plant, poisoning the insect when it attacks the foliage. If you prefer a more gentle method of destruction then use an organic surfactant spray i.e. it doesn't penetrate the plant tissue, but you will have to make sure that you spray underneath the leaf as well as on the top. Some Rhododendrons can start flowering from winter onwards in warmer areas of N.Z. but the main flowering period is considered to be spring. In full flower they add a dramatic beauty to the garden and are particularly superb under tall deciduous trees. If you really want to see Rhododendrons at their best I highly recommend a trip to the New Plymouth Rhododendron festival in October/November of each year. You can then get an idea of the type of Rhododendron that suits you and your garden and here at Wairere we'll do our best to match your desires. All plants called Rhododendrons in New Zealand are evergreen and fully hardy to cold. Azaleas are also classified as Rhododendrons and some of these are deciduous - for further information see our separate category.
White with rosy pink edges and cream in the center are the flowers that grace this plant. New foliage is a deep bronze-red and a little smaller than ‘Elizabeth Red Foliage’. A very attractive, compact plant, especially in winter when it displays red buds. Mulch Annually and avoid lime.
Flower Colour: Pink / White Habit: Compact Est. Hgt/Wdth in 7/10 yrs: 100cm x 100cm
Beautiful rounded trusses of pink with a cream throat appear in early spring. A nice small and compact Rhododendron. Happiest in a semi-shaded position with acid soil. Mulch regularly to keep the surface roots cool. Evergreen.
Flower Colour: Pink / Cream Habit: Upright Est. Hgt/Wdth in 7/10 yrs: 2m x 1.5m
You'll get a real buzz when you see 'Bumble Bee' blooming its head off in your garden in spring. Large rounded trusses made up of 25 flowers that are vivid purple with a deep maroon blotch. Handsome dark glossy green foliage. Plant in dappled light and mulch roots annually to keep cool. Evergreen
Flower Colour: Purple / Red Habit: Upright Est. Hgt/Wdth in 7/10 yrs: 2m
A charming little Rhododendron that is slow growing and compact in habit with clusters of white blooms, flushed to light pink and dark pink flecks inside. Darker pink on outer frilled petal. Hardy. Prefers dappled shade to sun, and acid soil. Mulch annually and avoid Lime. Evergreen.
Flower Colour: white-pink / white Habit: compact Est. Hgt/Wdth in 7/10 yrs: 100cm x 100cm
Delightful mauve buds open into frilly pink flowers. Rhododendron’s prefer dappled shade, but can be grown in full sun if protected from afternoon sun or kept well watered. Prune after flowering to maintain shape and to promote new growth. Mulch root area annually to keep cool. Avoid Lime. Evergreen
Flower Colour: Pink Est. Hgt/Wdth in 7/10 yrs: 1.5m x 0m
Pretty delicate rose coloured buds open to rose pink flowers. Rhododendron’s prefer dappled shade, but can be grown in full sun if protected from afternoon sun or kept well watered. Prune after flowering to maintain shape and to promote new growth. Evergreen.
Mulch root area annually to keep cool. Avoid Lime.
Flower Colour: Rose Pink Est. Hgt/Wdth in 7/10 yrs: 1.8m x 1.5m
Large rose pink buds open out to funnel shaped, frilly blooms of pale pink that gradually fade to almost white. The blooms start to appear in winter, nice compact growth habit. Plant in dappled light with acid soil and mulch annually to keep the roots cool. Avoid Lime. Evergreen.
Flower Colour: Pink / White Habit: Upright Est. Hgt/Wdth in 7/10 yrs: 2m x 1.5m
This compact bush has soft apple-blossom coloured flowers touched with a deeper pink. Leaves are deep forest green. Flowers in September. Plant in dappled light with acid soil and mulch annually to keep the roots cool. Avoid Lime. Evergreen.
Flower Colour: Pink Habit: Upright Est. Hgt/Wdth in 7/10 yrs: 1m x 1m
Large trusses of bright red bell shaped blooms appear from late winter. Dark green foliage and an erect open habit. Plant in semi-shade with acid soil for best results however 'Cornubia' is known to cope with more sun that many other cultivars. Evergreen.
Flower Colour: Red Habit: Upright Est. Hgt/Wdth in 7/10 yrs: 3m x 2m