A very easy-care perennial, Plectranthus ecklonii is perfect for brightening a shady corner of the garden from late summer through to autumn.
With masses of purple to violet-blue flower spikes set against soft, pale green foliage, it’s an attractive and reliable performer. Native to South Africa, this species grows naturally in woodland environments, which explains its preference for filtered light and sheltered conditions.
Growing as an evergreen, shrub-like perennial, P. ecklonii can reach over 2 metres in height. It’s well suited to part shade and works beautifully as an underplanting beneath taller species such as Brugmansia or small trees that provide dappled shade.
While often described as drought tolerant, it performs best with consistent moisture during the warmer months.
Plectranthus ecklonii Care
Plant Plectranthus ecklonii in part shade or a position that receives afternoon shade. It thrives when tucked in amongst other shade-loving perennials or beneath taller plants that filter the light.
This is a relatively upright grower, making it useful for adding height and structure in cottage-style gardens or shaded borders.
Apply a balanced fertiliser in spring after pruning to encourage strong new growth. Mulch well to keep the root system cool and retain soil moisture, particularly during summer.
It also adapts well to container growing, provided it is placed in a shaded or semi-shaded position and watered regularly.
Varieties
- Plectranthus ecklonii ‘Hawthorne Pink’ – A lovely selection with soft pink flowers, adding a different colour note to shaded plantings.
- Plectranthus ecklonii ‘Alba’ – A white-flowering form that creates a striking contrast in darker garden areas.
Summary
- Height – Up to 2.5m, but easily maintained with pruning
- Spread – Around 2m wide
- Position – Full sun to part shade; best in afternoon or dappled shade
- Soil – Humus-rich, well-drained soil with moderate moisture (tolerates poorer soils)
- Flowers – Violet-blue spikes in cone-like sprays
- Flowering Time – Late summer through autumn
- Frost Tolerance – Light frost only
- Drought Tolerance – Moderate, but prefers regular watering
- Coastal Conditions – Not ideal for exposed sites
- Container Growing – Well suited
Pruning
Plectranthus ecklonii responds well to a fairly hard prune in early spring, just as new growth begins to appear. This helps maintain a compact shape and encourages bushier, more vigorous flowering.
Wildlife & Pollinators
The flowers are attractive to bees and other pollinators, making it a useful addition to a wildlife-friendly garden.
Companion Planting
Pairs well with other shade-loving plants such as ferns, hostas, and impatiens for a layered garden effect.
Climate Suitability
Particularly well suited to frost-free or mild temperate regions, including coastal and eastern parts of Australia.
Where To Buy
More Plectranthus Varieties
