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Bittersweet / Celastrus

Bittersweets CAN be tamed! They are extremely vigorous, healthy, have splendid yellow leaves in autumn, and are often used for high greening, as there is less pruning to be done as with wisteria. In the garden, they can green up a pergola. The fruit will feed birds in winter.

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Celastrus orbiculatus / Bittersweet

Bittersweet "Celastrus orbiculatus"

Requirements / Price

Bittersweet needs a sunny (full sun) to semi-shaded position; it can be grown in the shade, but will produce fewer flowers and fruit. Best in nutrient-rich soil. Distance between plants: 1.5 - 4 metres.

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Characteristics and Pruning

These are vigorous twiners with sturdy stem formation. Celastrus orbiculatus from China is the more common variety. It has a strong growth with broad oval, dentate or serrate and clearly acuminate leaves. Celastrus scandens from North America has oval, acuminate leaves with undulating margins. There are several other varieties that resemble each other and the Mini-Kiwi. Foliage from May to October, yellow autumn colouring. Has inconspicuous, pale-green flowers, mostly dioecious (male and female on separate plants). In order to get the decorative berries, it is best to plant several specimens together. There should be some yearly pruning to get on top of the very fast growth, especially in the first 6 - 12 years.

Climbing Aids on Facades

The growth support should be sturdy... even old trees will do the trick. Lightning conductors, downpipes, roof gutters, etc.. should not be reached by the shoots, and any climbing supports (brackets/mounts) should have a distance of at least 1.5 m from all such structures and to the roof gutters-- to the side as well as to the top. Wire rope systems (see chart at the bottom) are suitable if the ropes are arranged parallel to each other as they are with wisteria: the shoots must therefore not be wrapped around the cable for long... if it 'chokes' the rope, the anchor screws may be torn off from the wall with the deformation of the ropes. Choose from the heavy or massive trellis systems.

Suitable wire rope trellises?

Click on the picture to see the table of all suitable trellis designs.

Photo Gallery

Examples of Celastrus / Bittersweet

High façade greening with celastrus on a trellis in autumn
Bittersweet on a trellis
Celastrus scandens on a wooden trellis
Small bittersweet on a façade
Greening with bittersweet on a special construct
Greening of a winter garden
Small bittersweet on a building
Celastrus orbiculatus as a twining vine on a sculpture. Otto Niemeyer-Holstein Garden in Lüttenort / Usedem / Mecklenburg-Vorpommern
Two bittersweets in autumn
Celastri are strong twiners; they are vigorous enough to tear a trellis out of the wall if the shoots strangle the wires, as in this picture (winter).
This celastrus wasn't pruned: he left the trellis and grows on this downpipe. This should never happen!
 

Botanical Features

Several species are represented with their flowers, fruits, and leaves.

Celastrus orbiculatus with a debut of autumnal colouring
Celastrus flagellaris
Celastrus scandens (North America) and its elongagted, oval, pointed leaves
Bittersweet with yellow leaves
The fruit stays after the leaves have been shed
The berries will provide food for birds in winter

Suitable Wire Rope Trellises for a Bittersweet

Please click on the graphic for more details!

 = suitable        = sometimes suitable      = not suitable