Viburnum tinus 'GWENLLIAN' laurustinus

Gwenllian is a bushy variety of laurustinus with bright purple red flower buds and lush evergreen foliage. Its leaves are 6-7 cm long, ovate, leathery but thinner than most evergreens, medium to dark green, and with conspicuous venation. In autumn it produces a profusion of highly attractive terminal cymes composed of purple red flower buds which open into tiny, white, fragrant flowers in December in mild winters of zones 7 and higher. In colder areas they start blooming from late winter or early spring and are followed by small, inedible but not poisonous, blue berries.

Laurustinus is cultivated especially for its lush foliage and compact habit. It forms upright growing, dense shrubs and is often used in hedges in warmer zones. In USDA zone 6 it grows about 1-1.5m tall and in higher zones it can be almost 2m tall. Stems turn purple red in autumn and winter. Gwenllian, same as Eve Price variety from 1961, was AGM by the Royal Horticultural Society of England (RHS) for exceptional beauty and reliability.

Now, let’s explore its hardiness. Despite its origin many trials proved that it can be cultivated down to USDA zone 6 or even 5b where it is root hardy as a perennial. Even if the top growth is killed by frost it always regenerates from live framework, just prune it after harsh winter and in a couple of months you will again have a beautiful, leafy shrub. In zone 6 it is best to grow it a mixed border combined with other evergreen plants which create a microclimate protecting it from sudden temperature swings. Location hidden from winter sunlight is also recommended there. Our shrub survived our strongest winter of 2006/2007 (-27 °C for 3 consecutive nights) when it was killed almost to the ground but resprouted and in early summer it was some 45-50 cm tall and bushy.

Laurustinus will grow virtually in any free-draining soil, but performs best in fertile, moist soil, acidic pH will help the foliage keep its healthy, deep green colour but is not a must. Mulching is crucial in zone 6 and lower. Small plants should be covered by evergreen boughs in winter. Fully (stem) hardy to -17 °C (zone 7), and root-hardy down to even -27 °C (USDA zone 5b) with protection.

Last update 31-01-2021