Rhododendron x impeditum Gristede

Rhododendron 'Gristede' is a charming small bush with a compact habit, forming a rounded shrub adorned with small pointed leaves, of a shiny dark green. Its spring flowering is stunning when the bush is completely covered with clusters of mauve violet flowers. This heathland plant obviously does not tolerate limestone or drought. It will thrive in a semi-shaded position, in acidic soil, which is slightly moist. Moderately hardy, this small Rhododendron will be perfect as an edging plant to form the first layer of vegetation in a flowerbed.

Rhododendrons are members of the Ericaceae family, which includes many ornamental genera (Kalmia, Leucothoe, Erica, Calluna, Oxydendrum, Gaultheria, Pieris...) as well as some small fruits (Vaccinium: blueberry, Arbutus: strawberry tree, Arctostaphyllos uva-ursi: bearberry). The genus Rhododendron is very rich in species (about a thousand), among which Azaleas are found. Azalea is a horticultural name, as botanically these plants are actually Rhododendrons.

Rhododendron 'Gristede' is a horticultural variety probably derived from Rhododendron impeditum, a dwarf species 60 cm (24in) tall with blue-violet flowers. Gristede has a slightly larger development, reaching approximately 1 m (3ft) in height and 1.20 m (4ft) in spread at maturity. It forms a more or less spherical cushion with beautiful shiny dark green foliage, consisting of small lanceolate leaves, evergreen in winter. Its main attraction lies obviously in its abundant flowering in shades of mauve violet to lavender lilac, which is more easily admired than defined by words! With a slow growth rate, this rhododendron grows about 5 to 7 cm (2 to 3in) per year. Its hardiness can be considered adequate, tolerating temperatures down to -15°C (5°F), but it will suffer beyond that. In regions with very cold winters, 'Blue Tit' is preferred, which looks very similar but has better hardiness.

With its small size and well-disciplined ball-shaped habit, Rhododendron 'Gristede' will be ideal as an edging plant in a field of heathland plants. To create beautiful layers of vegetation, Andromeda with Polium-like leaves could be planted at its base, a dwarf bush with fine foliage reminiscent of rosemary that stands out nicely against the dark green background of our small Rhododendron. Skimmia japonica Pink Dwarf, a dwarf variety with pale pink spring flowering, will accompany the Andromeda in the foreground, while the charming Pieris with their bell-shaped flowers will grow alongside the Rhododendron without hindering its development, as will the superb Mountain Laurels (Kalmia) with their vibrant flowers.