Cultivar lists can be found highlighted in bold throughout the text for each species.
Erica x afroeuropaea
Erica andevalensis : brezo de Andévalo (Andévalo heath)
- Erica andevalensis f. andevelensis : corolla dark pink.
- Erica andevalensis f. albiflora : corolla white
Erica andevalensis x tetralix
Erica arborea : tree heather, tree heath, bruyére
Erica x arendsiana : Arends’s heath
Erica australis : Spanish heath
Erica azorica : Azores tree heath, Azores heath
Erica carnea : winter heath, mountain heath
- Erica carnea : corolla pure white (f. alba)
- Erica carnea : corolla various shades of pink, not pure white (f. carnea)
- Erica carnea : foliage golden or yellow ( f. aureifolia)
Erica ciliaris : Dorset heath
- Erica ciliaris f. albiflora : corolla pure white
- Erica ciliaris f.aureifolia : foliage golden or yellow
- Erica ciliaris f. ciliaris : corolla in various shades of pink (not white)
Erica cinerea : bell heather
- Erica cinerea flowers pure white (f. alba)
- Erica cinerea flowers (pale) pink to (dark) purple (f. cinerea)
- Erica cinerea foliage golden or yellow (f. aureifolia)
- Erica cinerea anomalous clones: corolla split into segments (Polypetala Group)
- Erica cinerea anomalous clones: “wheat-ear” (bracteate)
Erica x darleyensis : Darley Dale heath
- Erica x darleyensis : corolla white (f. albiflora)
- Erica x darleyensis : corolla in various shades of pink (f. darleyensis)
- Erica x darleyensis : foliage golden or yellow (f. aureifolia)
Erica erigena : Irish heath
- Erica erigena flowers pure white (f. alba)
- Erica erigena flowers various shades of pink (f. erigena)
- Erica erigena foliage yellow (f. aureifolia)
- Erica erigena x lusitanica
Erica x factitia
Erica x garforthensis : Garforth heath
Erica x gaudificans : Edewecht heath
Bushy shrub to 0.5m tall. Leaves bright green, scattered, to 6.5mm long. Flowers terminal clusters of 8–20; calyx cup-shaped, 4-lobed, pale green; corolla campanulate or funnel-shaped or conical, white or pink; stamens 8, included, variously malformed; anthers degenerate, without awns; pollen observed.
Blooms mainly in summer.
An artificial hybrid, created by Kurt Kramer (Edewecht, Germany), from the Eurasian species Erica spiculifolia (Balkan heath) and the African (Cape) species Erica bergiana. Hardy and long-blooming (April to November).
Two cultivars have been named. Uncommon in cultivation in Britain and Ireland, yet the clones both thrive in gardens in the northwestern USA and western Canada.
Erica x griffithsii : Griffiths’s heath
Shrub to 0.5m tall; shoots erect or spreading; leaves in whorls of 4, to 8mm long; 1–4 flowers in axillary umbels on short leafy shoots, scented; calyx 4-lobed, variously coloured green or pink; corolla pink, campanulate, to 3mm long; stamens 8, erect, fully emerged; anthers without spurs.
Blooms in late summer and autumn.
A hybrid between Erica manipuliflora (whorled heath) and Erica vagans (Cornish heath) which occurred by chance in Britain in the mid-twentieth century. The clones are lime-tolerant, hardy (suitable for zone 6), and have the vigour of whorled heath and the compactness and early flowering of Cornish heath. Named after Professor John Griffiths, the first person to create the hybrid deliberately.
Erica x krameri : Kramer’s heath
Low shrub, 0.2–0.5m tall, spreading to about 0.5m across; shoots erect; new shoots discoloured (orange-red) in spring; leaves in whorls of 3 or 4, to 6mm long; flowers small, as many as 20 clustered in a compact (to 1cm long) terminal spike; calyx 4-lobed, colourless; corolla urn- to cup-shaped, about 4mm long, white to pink; stamens 8, not exserted; anthers without spurs; style (when not malformed) exserted.
Blooms in summer and autumn.
Deliberately created hybrid between Erica carnea (winter heath) and Erica spiculifolia (Balkan heath) which have a long flowering period with tiny flowers. Named after Kurt Kramer who was the first, and is the only, person to make the cross. Kramer's heath requires an acid soil and is suitable for zones 5-9.
Erica lusitanica : Portuguese heath
White flowers, XII–V, buts sometimes tinged pink; mid-green foliage; open erect habit; height to 1-4.5m; spread 61–75cm; leaves in whorls of 4 (sometimes in 3s), to 7mm long; flowers numerous and crowded appearing to form elongated spikes: 1–4 flowers in each terminal umbel at tip of short, leafy lateral shoots; calyx conical, with 4 lobes, white, waxy; corolla white, often tinged pink in bud, bell-shaped to tubular, to 5mm long; stamens 8, included; filaments white, with hairs on lower third; anthers with 2 spurs; style-end emergent, tinged red; nectar copious.
Blooms in winter and spring.
Native in widely scattered and relatively small areas in western and southern Portugal; south-western and north-eastern Spain and south-western France (Gironde). Also occurs as a naturalized garden-escape in places are widely separated as Hawaii, Tasmania, England and California. It has the longest flowering period of any tree heath, and will grow in most soils and is suitable for hardiness zone 8.
Erica mackayana : Mackay’s heath
(formerly Erica mackaiana)
Bushy shrub to 1.5m tall, branches ascending or sprawling; leaves in evenly spaced whorls of 4, always spreading more or less horizontally, obovate, flat; terminal umbels of about 10 flowers, evenly spaced, not lop-sided; flowers stalks not woolly; calyx of 4 unequal, free, green sepals, to 3.5mm long, not woolly on outside; corolla urn-shaped, to 7mm long, pale to dark pink, usually darker on sunlit side, or pure white; stamens 8, included; anthers with spurs; style-end emergent; nectar produced.
Blooms in summer (and early autumn).
Only found in western Ireland (counties Kerry, Galway, Mayo, Donegal) and northern Spain. Plants of Irish origin are hardy to zone 7 with protection, while the taller, more vigorous plants of Spanish origin vary from zone 8 to zone 7. All require damp, lime-free soil, and provide neat ground-cover but are suspect in dry conditions. Erica mackayana produces new shoots from the roots which can be detached to form new plants.
Closely related to cross-leaved heath (Erica tetralix) and also to the Andévalo heath (Erica andevalensis).
- Erica mackayana : corolla pure white ( f. eburnea)
- Erica mackayana : corolla pink (f. mackayana )
- Erica mackayana : flowers with additional ‘petals’ (‘semi-double’ to ‘double’) (f. multiplicata)
Erica maderensis : Madeira heath, Madeiran bell heather
synonym: Erica cinerea subsp. maderensis
Bushy shrub to about 1m tall; mature stems stout and woody with grey bark; leaves in whorls of 3, to 5(–10)mm long, linear; flowers in terminal umbels of 3–6 flowers; calyx with 4 free sepals, centre green, sometimes tinged pink; corolla mauve (H2) to 5mm long, tubular-ovoid; stamens 8, included; anthers with spurs; fruit with woody, thickened walls, very hygroscopic, opening wide on warm dry days; interior of valves glossy, pale gold when freshly opened.
Blooms in summer.
Restricted to the mountains of Madeira, and one thought to be only a subspecies of the bell heather. However it may be more closely related to the Corsican heath (Erica terminalis). Very uncommon in cultivation and not available commercially. It can be grown successfully in lime-free and well-drained sompost in containers with protection from winter frost (see Yearbook of The Heather Society 1999: 11–21. Heathers 5: 17–25. 2008).
Erica manipuliflora : whorled heath
synonym: Erica verticillata (invalid).
Shrub, erect or spreading or prostrate (especially at high altitude), to 4m tall; leaves in whorls of 3 or 4, to 9mm long; flowers 1–5 in axillary umbels on very short shoots; calyx of 4 free sepals or 4-lobed with unequal lobes fused at base; corolla bell-shaped, to 4.5 mm long, in varying shades of mauve or pink, or rarely white (Erica manipuliflora f. albiflora); stamens 8, emergent; anther without spurs; nectar produced.
Blooms in late summer and autumn.
An eastern Mediterranean species occurring from Italy (Apulia) through Croatia, Montenegro, Albania, Greece (including Crete, and the Ionian and Aegean islands), Turkey, northern Cyprus, Syria, and Lebanon. It is lime-tolerant and happily grows on magnesium-deficient soils. Suitable for hardiness zone 8.
Closely related to Cornish heath (Erica vagans). Only pink-flowered cultivars are commercially available at present but white-flowered plants are known in cultivation (one clone has been named 'Olivia Hall' but it is not commercially available).
Erica x mercatoris
Bushy shrub to 0.3m tall, with pubescent shoots. Leaves dark green, scattered, to 6.5mm long. Flowers small, in elongated terminal clusters of 20-30; calyx cup-shaped, 4-lobed, dull pink; corolla to 5mm long, campanulate to ovoid, bright mauve to lilac-pink; stamens 8(–10), included, variously malformed; anthers without awns; pollen observed; style usually straight, protruding.
Hardy and tolerant of lime. Blooms mainly in summer, but clones vary in their flowering period so there are flowers evident from spring to early winter (April to November). The flower spikes can be killed by severe frost.
An artificial hybrid, created by Kurt Kramer (Edewecht, Germany), from the Eurasian species Erica manipuliflora (whorled heath) and Erica spiculifolia (Balkan heath). Similar to Erica x gaudificans but with darker pink flowers and minute hairs on the apex of the ovary. See the Bruckenthalia Hybrids article for further details.
Two of the named cultivars are propagated in large quantities and sold as pot-plants, especially by German nurseries. However, plants can be cultivated outdoors.
The Latin noun mercator (merchant) is the equivalent of the German krämer which means a retailer or shopkeeper.
Erica multiflora : many-flowered heath
Erect shrub to 2.5m; leaves spreading, usually in whorls of 4 or 5, to 15mm long; flowers in axillary clusters of 1–4, towards the tips of the shoots; calyx 4-lobed, fleshy, waxy, white or pink; corolla ovoid, white to pink, 4–6mm long; stamens 8, emergent; anthers without spurs; nectar profuse.
Blooms mainly in autumn and winter but can occasionally be in flower throughout the year.
A western Mediterranean species ranging from eastern Spain to the Balearic Islands, southern France (including northern tip of Corsica), Italy (including Lampedusa, Sardinia and Sicily), Malta and Gozo, as well as coastal regions of Croatia, Albania and north-west Greece. It is also found in Morocco. Somewhat similar to the Cornish heath (Erica vagans) with flowers of a similar colour range but unlike the Cornish heath all the flowers tend to open together and can provide a spectacular display. It is lime-tolerant but is not really hardy which may account for its rarity in cultivation. Suitable for hardiness zone 9.
Erica x oldenburgensis : Oldenburg heath
Shrub to 1m tall; leaves in whorls of 3, linear, to 1cm long; flowers on axillary shoots in terminal whorls of 3–5; calyx with 4 unequal lobes, waxy, thicker in texture than corolla, usually white with green or yellow-green tips; corolla ovoid, pink, to 5mm long; stamens 8, often malformed; anthers without spurs.
Blooms in winter to late spring.
Deliberately created hybrid between tree heather (Erica arborea) and winter heath (Erica carnea)which have inherited the hardiness of the winter heath, created by Kurt Kramer (Edewecht, Germany). They exhibit brightly coloured new growth in spring. Lime-tolerant and suitable for zones 5-9.
Two clones have been named.
Erica platycodon : Canarian besom heath & Madeiran besom heath
These besom heaths are found only on the widely separated archipelagoes in the eastern Atlantic Ocean: the Canary Islands and Madeira. The populations are regarded as representing two subspecies; that in the Canary Islands is named Erica platycodon subsp. platycodon while the one restricted to Madeira and the adjacent island of Porto Santo is Erica platycodon subsp. maderincola.
Erica platycodon subsp. platycodon : Canarian besom heath
Shrub or tree to 6m or more tall; leaves about 9mm long, patent, with pair of furrows underneath; calyx green, cup-shaped, with 4 equal lobes; corolla greenish white to deep red with paler lobes, bell-shaped, to 3mm long; stamens 8, included; anthers without spurs; style-end disc-shaped, concave, about 1.5mm diameter, deep red (the same colour as the immature anthers); nectar not produced.
Blooms in late winter and spring.
This is the least hardy of the subspecies, only suitable for zones 6–9.
Erica platycodon subsp. maderincola : Madeiran besom heath
Shrub or small tree to 4m; leaves 10–12mm long, spreading, in whorls of 3 or 4, furrowed underneath; calyx green, conical, 4-lobed; corolla greenish pink, ovoid, 2–3mm long; stamens 8, included; anthers without spurs; style-end disc- to saucer-shaped; nectar not produced.
Blooms in late spring and early summer.
The Madeiran besom heath tends to have a more laxer habit than the Canarian one, longer leaves more widely spaced and spreading when mature, a shorter calyx and corolla with the stigma more exserted. Suitable only for zones 6-9. Both subspecies require lime-free soil.
Erica scoparia : (European) besom heath
synonym: Erica scoparia subsp. scoparia
Shrub to 4m tall, older plants tree-like; leaves linear, about 7mm, in whorls of 3 or 4, spreading or ascending; inflorescences numerous, crowded on shoots and appearing to form a raceme; individual inflorescence 1–3 flowered umbel; calyx green, 4 lobed; corolla to 2.5mm long, campanulate, greenish or tinged with red; stamens 8, included or rarely partly exserted; anthers without spurs; style-end disc-shaped, to 1mm in diameter, usually dark red ; nectar not produced.
Blooms from mid-winter to early summer.
Besom heath is widespread on the European mainland and in north Africa: France including Corsica; north-western Italy and Sardinia; Spain including Balearic Islands; Portugal; Morocco. It makes a rather untidy bush and varies in hardiness, being generally suitable for zone 7, although some of the dwarf cultivars are suitable for zone 6.
Erica sicula : Sicilian heath
synonyms Pentapera sicula, Pentapera bocquetii
There are two subspecies recognized.
Erica sicula subsp. bocquetii : Bocquet’s heath
Dwarf shrub to 0.25m tall; leaves in whorls of 3 or 4, spreading or ascending, linear, to 6mm long, pubescent on upper surface; flowers 2–3 per umbel, terminal on main or axillary shoots; pedicels 8–15mm long, pubescent with short, very sticky, gland-tipped hairs; calyx pale pink to dark red, with 5 unequal sepals, free except at base; corolla pale to deep pink, urn-shaped, to 8mm long, 5-lobed; stamens 10, included; anthers without spurs; ovary 5-locular, very densely hirsute; style-end not exserted, capitate, about 0.6mm diameter.
Bloom in late spring and summer.
Bocquet's heath is found in Anatolia, only at high altitudes. It is in cultivation.
Erica sicula subsp. sicula : Sicilian heath
Low shrub to 0.6m tall, often forming hummocks; shoots erect; leaves in whorls of 4 or 5, spreading or ascending, linear, to 13mm, often velvety; 2–8 flowers, rarely more, in terminal umbel son main or axillary shoots; calyx pale pink, with 4 or 5 free sepals; corolla pale to deep pink, sometimes white, urn-shaped, large, to 8.5mm long, 4-5-lobed; stamens 8 or 10, included; anthers usually without spurs but sometimes with minute vestigal spurs; ovary 4- or 5-locular, pubescent; style-end capitate, about 0.7mm diameter, dark red–black, usually at mouth of corolla but sometimes emergent; nectar profuse.
Blooms in spring.
The Sicilian heath occurs in widely scattered localities in the eastern Mediterranean, often in remote and isolated habitats: Sicily – confined to Monte Cofano and Isola di Marettimo: Libya – Cyrenaica only: northern Cyprus: Turkey – Anatolia; Lebanon. In cultivation in botanical collections.
Erica spiculifolia : Balkan heath, Bruckenthalia
synonym: Bruckenthalia spiculifolia
Low shrublet, about 0.2m tall, stems prostrate and ascending; leaves in irregular whorls of (2–)4–6, or spirally arranged, to 6mm long (leaves in inflorescence usually longer); 8–40 flowers in terminal raceme, or flowers solitary in leaf axils; calyx cup-shaped, pink, creamy-pink or white, usually tightly clasping the corolla, to 1.5mm long, with 4 triangular lobes; corolla bright pink to red–pink, very rarely white, campanulate, tiny, to 3mm long, 4-lobed; stamens 8, included; anthers without spurs; style emergent; no nectary present.
Blooms between late spring and early summer, but may continue into autumn in the wild.
The Balkan heath is found in south-eastern Europe (Romania, Bulgaria, Bosnia and Herzegovina, Serbia, Montenegro, Macedonia (FYR), Albania, Greece) and northern Turkey. It inhabits acid, sub-alpine regions to 2800m altitude and is suitable for zone 6. A dwarf plant, Bruckenthalia (its former generic name) is highly recommended for the small heather garden as it flowers between the winter-flowering and early summer-flowering heathers. It requires a lime-free soil and thrives best in full sun.
Bruckenthalia does not look like the majority of the hardy heaths because of it small flowers in a very distinct stalked raceme. It has proved to be amenable to hybridization.
Erica x stuartii : Praeger’s heath, Stuart’s heath
synonym: Erica x praegeri
Low shrub usually less than 0.5m tall; young shoots often brightly coloured; leaves in whorls of 4, more or less evenly spaced but internodes increasing in length towards inflorescence; flowers in uneven, terminal umbel; calyx with 4 separate, often unequal sepals, to 3mm long; corolla urn-shaped, usually pink; stamens 8, included; anthers with spurs; nectar produced, conspicuous.
Blooms in summer and autumn.
Praeger's heath is a naturally occurring hybrid between Mackay's heath (Erica mackayana) and cross-leaved heath (Erica tetralix) which has been known for a long time from Connemara and Donegal but also occurs in Kerry and has recently been reported from northern Spain. The cross has also been made artificially and several man-made clones have been named. Its habit and cultural requirements are similar to those for the Irish clones of Mackay's heath. All the named cultivars exhibit brightly coloured spring growth and are suitable for hardiness zone 7.
Erica terminalis : Corsican heath
Shrub to 2–3m tall; shoots upright; leaves in whorls of 4, to 9mm; flowers in terminal umbels; calyx with 4 free sepals; corolla 6–7mm long, urn-shaped, pink; stamens 8, included; anthers with 2straight spurs; nectar produced; style-end capitate, about 4mm diameter, exserted.
Blooms from late spring to late summer, or early autumn.
Native in south-eastern Spain, Corsica, Italy including Sardinia and Morocco, and long-naturalized in Northern Ireland. This lime-tolerant species is surprisingly hardy and is suitable for zone 5. The faded bells provide an attractive russet hue all winter.
Few cultivars have ever been named, and it is not as common in cultivation as it deserves to be.
Erica tetralix : Cross-leaved heath
Low twiggy shrub, stems erect or creeping, to 0.5–1m tall; leaves in whorls of 4, 3–8mm long, spreading in lower part of shoot but becoming erect and parallel to shoot below inflorescence; sometimes very densely hairy and so appearing grey; about 9 flowers in each terminal, usually lopsided umbel; flower stalks densely woolly; calyx with 4 free, green sepals, woolly on outer surface; corolla urn-shaped, usually pink, darker on sunlit side shading to white, or rarely pure white, to 7mm long; stamens 8, included; anthers with white spurs; nectar produced.
Blooms in summer to mid-autumn.
Native in western Europe from Scandinavia to the Iberian Peninsula. Although usually found in boggy areas in the wild, it is tolerant of drier conditions when brought into the garden. It requires acid, preferably moist, soil, and is suitable for zone 4.
- Erica tetralix flowers white (f. alba)
- Erica tetralix flowers shades of pink to purple
- Erica tetralix foliage yellow (f. aureifolia)
- Erica tetralix f. fissa : corolla not urn-shaped but irregularly split into segments
- Erica tetralix f. racemosa : flowers in an elongated head
- Erica tetralix f. stellata : flowers held horizontally and arranged evenly in a wheel-like head
- Erica tetralix f. tetralix : corolla pink in lopsided umbels
- Erica tetralix ‘Meerstal’
Erica x triparentalis
Variable, evergreen shrub. Leaves sometimes in whorls of 3–4, sometimes spirally arranged, linear, approx. 10mm long; mid-green when mature but young foliage usually discoloured (not plain green). Inflorescence in form of a spike, as in Erica arborea; flowers usually 3 at tips of shoots, white or pale pink, scented; buds often tinged pink, 5–6mm long, barrel-shaped to tubular-campanulate. Stamens included; anthers dark, with spurs covered with minute spicules. Ovary pubescent or hirsute; style erect, slightly curved , emergent, expanded at apex; stigma 4-lobed, usually dark red; nectary ring at base producing varying amounts of nectar. IV–V (in northwestern Germany). An artificial triple-species hybrid, created deliberately in 2011 by Kurt Kramer (Edewecht, Germany) by using pollen from Erica australis (southern heath) to fertilize the hybrid Erica x veitchii (Veitch's heath). Thus, the name of this hybrid alludes to its three "parent" species – Erica australis, with Erica lusitanica and Erica arborea (= Erica x veitchii) Only one clone introduced to date (2020): see 'New Horizon'. See the Full Description for details of this species.
Erica umbellata : dwarf Spanish heath
Low bushy shrub, to 0.6m tall, shoots upright, slender; leaves in whorls of 3, small, to 4mm long; 3–6 flowers in terminal umbels; calyx of 4, ± separate, unequal, green sepals; corolla to 5mm long, top- or urn-shaped, pink, very rarely white; stamens 8, emergent; anthers without spurs.
Blooms late winter to summer
This heath occurs wild in Spain, Portugal and northern Morocco. It is a very useful species because in gardens it bridges the 'June gap' between the spring-blooming and later summer-blooming heathers. It requires well-drained soil that need not be lime-free. Suitable for zone 8.
There are only two named cultivars.
Erica vagans : Cornish heath
Shrub to 1m tall, branches erect or decumbent; leaves in whorls of 4 or 5, linear, to 10mm long; flowers in umbels on condensed lateral shoots, numerous umbels forming a spike; calyx unequally 4-lobed; corolla bell- or cup-shaped, to 5mm long, in various shades of lavender, mauve or pink, very rarely white; stamens 8, emergent; anthers without spurs; nectar produced.
Blooms in summer and early autumn.
Cornish heath occurs wild in Britain only on the Lizard Peninsula in Cornwall. It also ranges though western France, into the Pyrenees, and northern Spain. There is an enigmatic colony of white-flowered plants in Northern Ireland. It can be successfully grown on any soil rich in magnesium and responds well to hard pruning. It is suitable for zone 5 provided the dead flowers, which are an attractive russet in winter, are kept on the plant.
- Erica vagans f. alba : corolla white
- Erica vagans f. aureifolia : foliage yellow or golden
- Erica vagans f. vagans : flowers various shades of pink (not white)
Erica x veitchii : Veitch’s heath
Variable shrub to 4m or more tall; shoots hirsute with both simple and plumose hairs intermixed; leaves linear, to 6mm long; flowers white, in terminal whorls of 3 or 4; calyx 4-lobed, green, cup-shaped, waxy, thicker in texture than corolla; corolla tubular-campanulate, to 4mm long; stamens 8, included or tips just visible at base of corolla lobes; filament with spicules on lower quarter; anthers with spurs.
Blooms from mid-winter to late spring
A hybrid between tree heath (Erica arborea) and Portuguese heath (Erica lusitanica), represented in cultivation by at least five cultivars which vary in hardiness from zone 7 to zone 8. Veitch's heath can be grown in most alkaline soils. All the cultivars are of garden origin, and while there are reports of this hybrid occuring naturally in northern Spain these reports have never been proven beyond doubt.
Erica x watsonii : Watson’s heath
Very variable shrub to 0.5m tall; leaves in whorls of 4, to 3.5mm long; flowers in elongated or umbel-like spikes; calyx green, sepals unequal, separate; corolla pink, or white and pink, usually lop-sided, about 9mm long; stamens 8, included; anthers with vestigial spurs.
Blooms in summer
Watson's heath, named after the English botanist Hewitt Cottrell Watson, is a hybrid between cross-leaved heath (Erica tetralix) and Dorset heath (Erica ciliaris). It occurs in the wild in Britain, France and Spain, andoccurs in the wild as a natural hybrid in Britain, France and Spain, and it has also been created artificially. The habit of the clones in cultivation varies considerably but generally they have a long flowering period and brightly coloured tips to shoots in spring. They require acid soil conditions and are suitable for zone 7.
Around a dozen cultivars are named.
Erica x williamsii : Williams’s heath
Variable shrub; shoots with bright yellow tips in spring; leaves in whorls of 4, to 5mm long; flowers usually in terminal umbels; ; calyx 3- or 4-lobed; corolla pink, to 5mm long, urn-shaped; stamens 8, usually included, but stamen length is very variable; anthers very small, spurs absent or present.
Blooms in summer and early autumn.
As a wild, naturally occurring hybrid between cross-leaved heath (Erica tetralix) and Cornish heath (Erica vagans), this is apparently endemic to the Lizard Peninsula, Cornwall (see Heathers 4: 45–56. 2007). However, Erica × williamsii could also exist in France and Spain where the parent species co-exist.
Williams's heath, named after P. D. Williams, has also be created artificially, and clones of both wild and garden origin are available. They will grow on most alkaline soils, and all exhibit, some more than others, coloured shoots in spring.
Suitable for hardiness zone 5.
About a dozen cultivars are named.