At a glance
Winter jasmine, Jasminum nudiflorum, is a deciduous wall shrub that produces small, bright yellow flowers on bare green stems from November through to March. It is one of very few garden plants that flowers reliably in the depths of winter, producing colour during the months when most of the garden is dormant. It is not fragrant, which surprises many people who associate jasmine with scent. That quality belongs to the summer jasmines. Winter jasmine’s value lies entirely in its flowering time and its toughness. It is not toxic to people or pets.
It is a plant that genuinely earns its space. It will grow in north-facing positions where very few other flowering plants will perform. It tolerates poor soil, cold winds and general neglect. On a wall or fence it produces arching stems that can reach 3 metres or more, and when in flower in the dark months of the year it provides a level of visual impact that very few plants can match. The flowers appear before the leaves emerge, which amplifies the effect against bare green stems.
What winter jasmine is and why it is worth growing
Most winter-flowering plants are subtle or small-flowered. Winter jasmine is neither. At its best, a well-trained plant covering a north-facing fence is smothered in vivid yellow flowers from late autumn through to early spring, visible from the other end of the garden. The flowering season spans the period from first hard frosts through to the point where spring bulbs begin to provide competition. Nothing else fills that gap as reliably or as boldly in such a wide range of growing conditions.
The other practical advantage is its tolerance of difficult spots. Where other flowering plants need shelter, good soil and reasonable light, winter jasmine will grow in hard clay, poor thin soils, north or east aspects, and exposed positions. A gardener inheriting a bare north-facing wall and wanting to cover it with something that actually flowers has very few options. Winter jasmine is the most reliable of them.
Planting winter jasmine
Winter jasmine can be planted at almost any time of year, though autumn and spring are the most reliable periods. Autumn planting allows the roots to establish before the growing season. Container-grown plants can go in year-round provided the ground is not frozen or waterlogged. The table below covers the key planting requirements at a glance.
Plant at the same depth as the compost surface in the pot. Dig a hole twice the width of the rootball, incorporate some compost or leaf mould if the soil is very poor, and firm in well. Water thoroughly after planting. Against a wall or fence, position the plant 30 to 40 centimetres away from the base to avoid the rain shadow, where soil tends to stay dry even in wet weather. Avoid extremely waterlogged ground as the roots will rot in permanently wet conditions.
Winter jasmine does not produce aerial rootlets or tendril climbers. It does not climb unaided. The arching stems need to be tied in to a support system as they grow. A trellis, wall wires or netting all work well. Alternatively, it can be grown as a free-standing shrub allowed to arch outward and downward, or trained along the top of a low wall or bank where the stems cascade attractively downward.
Training and support
Because winter jasmine does not self-cling, training is ongoing throughout the plant’s life. The stems are long, flexible and arching by nature, and they need regular tying in during the growing season to maintain the shape you want. Left entirely unmanaged, the plant produces a sprawling mound of interlaced stems that becomes difficult to manage and flowers less well in the interior where light cannot reach.
For wall training, space horizontal wires 30 to 40 centimetres apart across the wall surface and tie new stems in loosely as they extend. Use soft ties or garden twine rather than wire, to avoid cutting into the stems. Fan the stems outward to fill the space evenly rather than allowing them to all run in the same direction. For a cascading bank or retaining wall effect, establish the plant at the top of the slope and the long arching stems will naturally tumble downward with minimal intervention.
Tying in during summer produces next winter’s display. The new growth that emerges after the spring prune develops into the stems that carry next winter’s flowers. Tying them in as they extend gives them the light and space they need to mature properly, which directly affects how well the plant flowers.
Watering
Winter jasmine is drought-tolerant once established, typically after its first full growing season. In the first year after planting, water regularly during dry spells to help the roots develop. After establishment, rainfall alone is usually sufficient in a typical UK climate. Only in prolonged summer dry spells does an established plant in open ground need supplementary watering. In containers, water whenever the compost has dried out to a centimetre below the surface, and reduce watering significantly in winter when the plant is dormant.
Feeding
Winter jasmine has different feeding needs depending on whether it is growing in garden soil or a container. The table below sets out what to do in each situation.
Pruning
Pruning is the single most important maintenance task for winter jasmine and the one most often done incorrectly. The critical rule is timing: prune immediately after flowering, which means February or March in most UK gardens. Do not wait until autumn or summer. Winter jasmine flowers on the previous year’s growth, so stems that grow in spring and summer this year will carry the flowers next winter. If you prune in autumn or summer you remove the stems that would have flowered.
On a neglected plant that has built up a mass of old tangled stems, a more severe renovation is possible. After flowering, cut the entire plant back hard, removing most of the old growth to within 30 to 60 centimetres of the base. New growth will emerge vigorously from the base and lower stems. The plant will not flower the following winter as it needs a full season to build new flowering wood, but it will recover strongly and produce a better display in subsequent years.
Never prune in autumn or summer. Winter jasmine flowers on growth produced the previous season. Pruning at any time other than immediately after flowering removes the stems that would have carried next winter’s display. This is the most common cause of a healthy plant failing to flower.
Propagation
Winter jasmine is straightforward to propagate by two methods. Hardwood cuttings are the most reliable for producing multiple new plants. Layering requires less equipment and suits gardeners who only want one or two new plants.
Layering is the simpler alternative. In spring or early summer, select a long flexible stem and bend it down to the ground. Make a small nick in the underside of the stem where it will contact the soil, peg it down firmly and cover the contact point with soil. Leave it attached to the parent plant until roots have formed, usually by the following autumn, then cut it free and plant it in its final position.
Seasonal care through the year
The year for winter jasmine follows a clear pattern shaped almost entirely by the flowering and pruning cycle. Understanding what the plant needs at each stage prevents the most common mistakes.
From late autumn through to early spring, the plant is flowering and needs the least attention. The single action required during this period is to enjoy it and resist any urge to tidy it up by cutting stems. After flowering ends in February or March, pruning is the priority. From spring through summer, the new growth produced after pruning develops into the stems that will carry next winter’s flowers. This is the time to tie in new shoots as they extend, water in dry spells if the plant is recently planted, and cut hardwood cuttings if you want new plants. By autumn the stems are mature and beginning to form their flower buds.
Common problems
Winter jasmine is generally trouble-free in UK garden conditions, but the problems below do occur and each has a clear cause and fix.
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