Osmanthus heterophyllus 'VARIEGATUS' varigated osmanthus
Osmanthus
Osmanthus, called sweet olive in English, takes its name from Greek words osme (fragrance) and anthos (flower). The genus comprises roughly 25–30 species, along with numerous cultivated forms, many of which are often mistaken for hollies because of the shape and firmness of their leaves. Osmanthus reached Europe during the 18th century, when botanical gardens and plant collectors began to focus intensively on woody plants from East Asia. The genus was first scientifically described by Carl Linnaeus (1707–1778) in 1753, but the detailed classification of individual species as we know it today is largely the work of later botanists, particularly Japanese and European taxonomists of the 19th century, who were able to study living plants in their native habitats.
Osmanthus plants caught my attention at first sight in 2004, and I became a collector long before I had read about their supposed sensitivity to our climate. You know the saying, “Never say something can’t be done, because someone may come along who doesn’t know that and does it”? I simply planted one after another in my garden and observed how they behaved. They were tested most severely during the harsh winter of 2006/2007, yet not a single plant died. Scorched leaves grew back, frost‑damaged twigs were pruned away, and some specimens are now taller than I am. I have also noticed a remarkable genetic tolerance to drought, although I still need more time to distinguish those that cope well with both summer and winter dryness from those that require watering during winter.
Osmanthus heterophyllus, the holly osmanthus, originates from central and southern Japan (Honshu, Shikoku and Kyushu) as well as Taiwan, where it has been regarded as an integral part of everyday life for centuries. It was botanically described by Carl Peter Thunberg (1743–1828), a Swedish botanist who was among the very few Europeans allowed to study Japanese flora on site, and thanks to him the species entered European collections at the turn of the 18th and 19th centuries. In Japan it was planted near houses, temples and in traditional gardens as a quiet form of protection and a valued evergreen backdrop. Its twigs were used in New Year arrangements and rituals as symbols of strength and endurance, the wood served for small‑scale crafts, and the plant was appreciated for its reliability close to human dwellings.
Variegatus is a less well-known and rarely available holly osmanthus variety, which is unfortunate as it has much to offer. It is a slow-growing shrub, structurally and growth-wise reminiscent of the variegated cultivar Goshiki with yellow-green leaves. However, the leaves of this variety are white variegated, which is why it is sometimes still found under its older name Argenteovariegatus. The evergreen leaves are leathery, slightly glossy, pale green in the center with bold creamy-white margins. They are spiny on young plants, making the shrub resemble hollies at first glance. However, a trained eye will notice the difference – hollies have alternate leaves, whereas osmanthus has opposite leaves. In maturity, leaves at the top of the plant may become entire with smooth rather than spiny margins.
In autumn, it blooms profusely with tiny, yet sweet and strongly fragrant flowers. If pollinated by a male plant, small, almost black, non-toxic fruits may follow, though this is rare. Variegatus osmanthus grows slowly to moderately (20-25 cm per year) and forms upright, funnel-shaped shrubs that over time become broadly oval (30 years or more). While naturally attractive, it is easy to maintain and shape through pruning. Spring pruning encourages branching, while summer pruning is for shaping. The twigs and trunks are light gray and smooth.
Spine-leaved osmanthus has long been used as a natural barrier against wild animals and cattle. Another significant advantage is that they are long-lived shrubs or trees, and we are not talking about decades but hundreds of years. There are records of specimens whose age was estimated to be 950 or more years. In other words, if located in an ideal spot it can be a plant that will be passed on by one generation to another. It looks great as an attractive evergreen specimen shrub or small tree and does a good job as a hedge, too.
Grow osmanthus in moist but well-drained, humus rich, preferably acidic soil. Provide plenty of mulch for winter to protect the roots from quick freezing. It loves full sun but in colder regions find it a location sheltered from late winter and early spring sunlight but with plenty of light during the growing season. Use only plants with mature wood in zone 6 and transplant it no later than late summer in order to avoid frost damage after the first winter. It is trialed hardy to -24 °C (USDA zone 6). It will withstand a few degrees lower with some wood damage but regenerates readily after spring pruning. It does not suffer from diseases, but vine weevil can be a problem.
Last update 21-03-2007; 06-03-2025
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- STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
- DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
- EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
- STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
- HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
- SHRUB - a woody plant with branches growing bushy from the ground level.
- HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
- FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
- GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
