Rhododendron calostrotum 'Gigha'
rhododendron 'Gigha'
A dwarf evergreen shrub to 40cm high, with ovate, scaly blue-green leaves to 3cm long. Produces saucer-shaped purplish-red flowers, with dark red marking on the upper petals, singly or in small clusters in May and June
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Size
Ultimate height
0.1–0.5 metresTime to ultimate height
5–10 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
AcidColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Purple Red | Blue Green | ||
|---|---|---|---|---|
| Summer | Purple Red | Blue Green | ||
| Autumn | Blue Green | |||
| Winter | Blue Green |
Position
- Full sun
- Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
Sheltered Hardiness
H6Botanical details
- Family
- Ericaceae
- Native to GB / Ireland
- No
- Foliage
- Evergreen
- Habit
- Bushy
- Potentially harmful
- Harmful if eaten. Wear gloves and other protective equipment when handling. Pets (dogs, cats, rabbits, tortoises) Harmful if eaten - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
- Genus
Rhododendron can be evergreen or deciduous shrubs or trees, with simple leaves, sometimes with a dense colourful indumentum of hairs on the lower side, and funnel-shaped, bell-shaped or tubular flowers that may be solitary or in short racemes
- Name status
Accepted
How to grow
Cultivation
Grow in moist but well-drained, humus rich, acidic soil, in full sun or light shade. Choose a site with good ventilation, away from extremes of temperature (such as frost pockets and sun traps). Mulch annually, ideally with leaf mould. See rhododendron cultivation for more detailed advice
Propagation
Propagate by semi-hardwood cuttings in late summer
Suggested planting locations and garden types
- City and courtyard gardens
- Cottage and informal garden
- Rock garden
- Flower borders and beds
Pruning
Pruning group 8 (evergreens); trim lightly after flowering to maintain shape
Pests
May be susceptible to vine weevil, whitefly, rhododendron leafhopper, lacebugs, scale insects, caterpillars and aphids
Diseases
May be susceptible to rhododendron diseases including rhododendron bud blast and rhododendron petal blight, as well as powdery mildews, honey fungus, rust, leafy gall, silver leaf and Phytophthora root and shoot rots
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