Rubus ulmifolius commonly known as elm-leaf blackberry in English and zarzamora in Spanish is a species of wild blackberry native to Western Europe, from the Netherlands south to Spain and Portugal, in Britain and Ireland, as well as NW Africa. It has been introduced widely and is invasive and a problem in parts of Argentina, Chile, Australia, New Zealand and the United States. It colonizes natural and semi-natural ecosystems where it competes with and displaces native plant species and degrades habitats negatively impacting native fauna. It is a species of flower plant belonging to the Rubus L. genus and Rosaceae family. Few of the popular common names of the plant are Elm-leaved blackberry, Himalaya blackberry, Himalayan giant blackberry, zarza, zarzamora, Zarzamora, Elm-Leaved Bramble, Bramble and Burbank’s thorn less blackberry. It is a semi deciduous, prickly shrub with straight to curved thorns on the angles of the long canes pink flowers and red to black berry fruit.
Elm-leaf Blackberry Care
Rubus Ulmifolius
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How to Care for the Plant
Pruning
To remove stems which have fruited earlier in the season. These will not produce well in the next season and removing them will encourage the growth of new fruit producing stems.
Fertilizer
An annual application in May time of a couple of handfuls of blood, fish and bone worked into the surrounding soil will top up nutrient levels.
Sunlight
Blackberries are well known for growing in shade and indeed they are one of the few fruits which produce a decent crop in those conditions.
Soil
As far as soil goes, almost all conditions except chalky ground is suitable. Blackberries also need a free draining soil which can still retain some moisture. Do not plant them in ground which becomes water-logged.
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