Vitis 'ONYX'

Vitis
Vitis 'ONYX'
grape vine
SIZE/TYPE vine
USUAL HEIGHT 2-5m
USUAL WIDTH
LEAVES deciduous broadleaf
COLOUR OF LEAVES green
LOCATION full sun
USDA zone (lowest) 6   (down to -23°C)
WINTER PROTECTION  
FOR ZONE 5+6 Code of winter protection zone 5+6
FOR ZONE 7 Code of winter protection zone 7
BELONGS TO CATEGORIES Fruit trees

Onyx is a new grape vine variety from Slovakia from 2002 (patented in 1996), a cross between Bulgarian Dunavski misket and American Beauty Seedless. It produces very large grapes with medium-sized or large berries of rich purple blue colour that ripen in late September. The taste is full, well balanced, sweet and mildly acidic with a hint of Muscat aroma. It is suitable for outdoor cultivation in forms of large shrubs for good air circulation.

Grape vine has to be pruned every year in warmer days of January or at the end of winter after the danger of the worst frosts. Cut back side branches to 2-3 buds – 2-years-old wood bears fruit. Treat it against mite before buds open. When it sets fruit cut off the new shoots a few centimeters above the grape and do not let it grow again. From midsummer you can start removing leaves from above the grapes to allow direct sunlight. Get some wasp-trap as they could ruin your fruit and may get dangerous. Some protection against fungi diseases is useful but not vital.

Grow grape vine in sunny and airy (not windy) locations. It is not suitable for damp sites and shady pergolas where it can easily be affected by diseases. Provide a good support. The best results are on slopes – because of the angle of sun rays. The soil has to be permeable, humus-rich and deep. Extra watering is desired by end spring and later only if the summer is dry, and always directly in the soil, never water the whole plant. In autumn remove fallen leaves from under the plants as they might contain diseases and mites. Fertilizing is good if adequate and selective, otherwise the plant will grow wild and set too much fruit of inferior quality. Fully hardy to -17°C or -23°C on protected sites (USDA zone 6).

Last update 08-08-2014.
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GLOSSARY
  • 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.
LARGE PLANTS over 150 cmspecimens, screening and hedging shrubs

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