Calluna vulgaris ‘Amethyst’

Description

Quick Facts
– Botanical Name: Calluna vulgaris ‘Amethyst’
– Common Name: Ling Heather ‘Amethyst’
– Plant Type: Evergreen dwarf shrub
– Mature Height: 25–35cm
– Mature Spread: 35–50cm
– Flowering Period: August to November
– Flower Colour: Rich amethyst-purple flower spikes — a deep, jewel-like tone that gives the plant its name
– Foliage: Fine, scale-like foliage in mid to dark green; neat and evergreen year-round
– Habit: Low, spreading, compact mound
– Aspect: Full sun
– Soil: Acidic, moist, well-drained; ericaceous compost essential
– Hardiness: Fully hardy in Ireland & the UK
– Available pot sizes: 1 litre and 1.5 litre
– Maintenance: Very low — clip lightly after flowering

Description
Calluna vulgaris ‘Amethyst’ is the deep, jewel-toned member of the heather collection — rich amethyst-purple flower spikes that glow with an intensity and warmth that the name entirely promises. From August through to November, the compact mound of dark green foliage is covered in a generous, sustained display of deep purple that brings one of the most vivid colour notes in the late-season garden — a tone that catches the low autumn light and holds its richness through the weeks when the garden needs it most.

In a mixed heather collection, ‘Amethyst’ provides the deep, saturated note that makes the surrounding whites and pinks sing by contrast. In a drift of its own, the deep amethyst creates a bold, unified carpet of colour that reads from a distance and rewards up close with the jewel-bright intensity of the individual flower spikes.

Available in both 1 litre and 1.5 litre pot sizes — whether you’re starting a new heather garden or filling a generous drift, there is an ‘Amethyst’ for the scale of the job.

Rich, deep, and entirely beautiful — the jewel of the heather collection.

Specification
– Available pot sizes: 1 litre | 1.5 litre

Caragh Garden Notebook

Planting:
Plant in spring or early autumn into acidic, moist, well-drained soil with ericaceous compost. Full sun gives the richest, most vibrant amethyst colour — the deep jewel tone is at its most intense in a bright, open position and softens in shade. Plant at the same depth as the pot, firm in gently around the roots, and water in thoroughly. For a heather garden or ground-cover planting, space at around 40–45cm to allow the compact mounds to develop and knit naturally. For a quicker, denser effect, the 1.5 litre plants give a more established start and fill in sooner.

Watering:
Water consistently through the first growing season while the plant establishes. Once settled, ‘Amethyst’ manages well with natural rainfall in well-drained, acidic soil and requires little supplementary watering in an Irish garden. In containers, water regularly and never allow the compost to dry out completely. Collected rainwater is always preferable to alkaline tap water for the long-term health of all ericaceous plants.

Feeding:
Feed with an ericaceous fertiliser in spring to support healthy growth and the richest, most intense amethyst flower colour. An annual topdress of ericaceous compost around the base maintains the acidic conditions the plant needs. Avoid general-purpose or lime-rich fertilisers, which cause yellowing foliage and gradual decline.

Pruning:
Clip lightly with shears after flowering — in late autumn or early spring — removing the spent flower spikes and approximately a third of the previous season’s growth. This keeps the plant compact and prevents the base from becoming woody and bare over time. Light, consistent annual trimming from the start; never cut back into old, bare wood.

Pests & Problems:
Entirely trouble-free in the right conditions. Yellowing foliage is almost always a sign of incorrect soil pH — addressed with ericaceous compost, ericaceous feeding, and rainwater watering. Good drainage is equally essential. Otherwise, ‘Amethyst’ is as self-sufficient and dependable as any heather in the collection.

Design Notes:
The deep amethyst-purple of ‘Amethyst’ is the jewel tone of the heather collection — a rich, saturated colour that lifts everything around it and provides the deepest, most vibrant note in a mixed heather planting. Use it alongside ‘Agnes’ or ‘Hilda’ in double white for a bold, high-contrast pairing that is one of the most effective in the heather palette; combine it with the soft pinks of ‘Sarah’ and the warm roses of ‘Mary Rose’ for a warm, harmonious progression from pale to deep; or use it in generous drifts of its own where the jewel-bright colour creates a bold, sustained sweep through the late-season border. Combined with dwarf conifers in silver, gold, and blue-green, it creates the classic heather garden combination at its most vivid. In a container with ericaceous compost, it brings a long season of deep, rich colour to a sunny terrace — a heather that earns its name in every sense.