Gadenin日本語Get the appThis is a plant grown for one thing
Wintersweet flowers on bare wood in the coldest part of the year, and the flowers themselves are small, waxy and pale straw-yellow, easy to miss from twenty feet away. What carries is the scent. On a still, damp winter morning a single mature shrub will perfume the air for thirty or forty feet around it, and that is the entire reason the plant is worth its space.
Everything about how you look after it follows from that. A wintersweet planted at the far end of a border, behind a fence, or on the side of the house nobody walks past in winter is a shrub that gives you almost nothing. The same plant beside a door, a gate, the path to the bins, or under a window you open on mild days is one of the best things in the garden. If yours is already in the ground in a place you never pass in winter, cutting stems to bring indoors is the fix, and it is covered further down.
Water and feeding through the growing year
An established plant, meaning one that has been in the ground three years or more, needs no watering in an ordinary season. It is deep-rooted and copes with dry spells better than most shrubs of its size. The exception is late summer, and it is the one exception worth taking seriously: the flower buds for the coming winter are formed on the shoots that grew this year, and a plant that goes through a long dry late summer sets fewer buds. If you get four weeks without meaningful rain in the second half of summer, give it two full buckets, about five gallons (20 liters), poured slowly at the root run once a week until the weather breaks.
Feeding is a light touch. Too much nitrogen produces long soft shoots and fewer flowers, which is the opposite of what you want. A single handful of a balanced granular fertilizer scattered over the root area as the leaves come out, followed by a two-inch (5 cm) mulch of garden compost or bark kept clear of the stems, covers the whole year.
| Stage of the year | Water | Feed |
|---|---|---|
| Flowering, bare wood | None needed | None |
| Leaves emerging | Only if the ground is dry | One handful of balanced granular feed, then mulch |
| Early to midsummer | New plants weekly, established none | None |
| Late summer, buds forming | 5 gallons (20 L) weekly in drought | None |
| Leaf fall onwards | None | None |
Accept that it is dull in summer
From leaf-out until leaf fall, wintersweet is an upright, rather stiff green shrub with coarse, sandpapery leaves and no flowers, no fruit and no useful autumn color beyond a brief soft yellow. It will reach six to twelve feet (2 to 4 m) tall and nearly as wide given twenty years. Plan for that honestly: put it where a plain green mass is acceptable or even useful, such as backing a summer border, screening a fence, or filling the gap behind something that performs from spring onwards.
The mistake to avoid is planting it as a specimen in the middle of a lawn or at the front of a bed you look at every day all summer. You will spend eight months resenting it and one month forgiving it. Set behind other planting, the same shrub disappears in summer and steps forward when everything around it is cut down or dormant.
Cutting stems for the house
Cut branches open indoors readily and scent a whole room, and cutting is also, conveniently, most of the pruning the plant needs. Take stems while the buds are fat and just showing color rather than fully open, and they will last a week to ten days in water.
- Choose the stem before you choose the flowers Pick stems that are crossing, crowding the center, or growing back into the bush. You are pruning and picking with the same cut, so take the branch you would have removed anyway rather than the prettiest one on the outside of the plant.
- Cut back to a join Cut to just above a side shoot or back to the main stem. Do not leave a stub sticking out beyond the join; stubs die back and become an entry point for coral spot and other dieback fungi.
- Split the base and use cool water Slit the bottom inch (2.5 cm) of each woody stem vertically with pruners before putting it in water. Keep the vase cool and out of direct sun and away from a radiator; warmth forces the buds open in a day and then they brown.
- Force a bare branch if you are impatient Stems cut while buds are still tight and green will open in a cool room over one to two weeks. A branch cut in the depths of winter and stood in a shaded, unheated porch is the reliable way to have flowers indoors.
What winter weather does and does not hurt
The wood is hardy to around 0F (-18C) and the dormant flower buds to the same, which is well beyond what most gardens deliver. Open flowers are tougher than they look: they will freeze solid at 20F (-7C), look translucent and ruined, then thaw and carry on scenting. Do not cut off frosted flowers, and do not wrap the plant.
The real weather problem is wind. A cold, dry wind strips the scent away before it reaches you and browns the flowers at the edges. A shrub with a wall, hedge or fence on the windward side flowers no earlier but smells far stronger, because the scent pools instead of being carried off.
Do not panic if flowering is patchy in the first winters after planting or after a hard move. A settled wintersweet flowers more heavily every year for its first decade, and a young plant that produces a dozen flowers is behaving normally.
What to record for next year
Three notes make every following winter easier to read. First, the week the first flower opened and the week the last one faded, kept year on year. That tells you whether a cold or mild autumn shifts your plant, and it tells you when to be ready with pruners. Second, how dry your late summer was and roughly how much you watered, because the link between a dry late summer and a thin flowering the next winter only becomes visible when you can compare two or three years.
Third, note where the scent actually reached, not where the plant is. Stand at the door, the gate and the path on a still evening and write down whether you could smell it from each. That single line decides whether your next wintersweet, or a relocated one, goes in the same place or six feet closer to where people walk.