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EVERY STEP OF THE WAY

What we do - The process explained

  • Selection of rootstock

    Selection

    - Characteristics are identified that address the needs of the market
    - Select unique properties such as bunch size, taste and fertility
    - Evaluate selections for any adverse qualities
    - Identify each selection by a specific clone number under the particular cultivar

  • Virus Cleaning

    Virus Cleaning

    - Many different viruses cause negative influences in the vineyard
    - Plants do not have the ability to resist virus infections
    - It is essential to eliminate viruses from plant material
    - The elimination process is time consuming - up to two years
    - The method is for plants to outgrow the virus - a microscopic shoot tip from this growth is used to propagate new virus-free plants

  • Multiplication of Base Plants

    Multiplication of Base Plants

    - After virus cleaning the vulnerable test tube plant material is nurtured into stronger plants
    - Through various growth phases in different plant mediums the virus free plants end up in hothouses for multiplication
    - Hothouse plants form the basis for further mother block plantings

  • Multiplication of Base Plants

    Multiplication for Nurseries

    - Mother blocks are planted under specific controls to ensure the best quality material
    - Rootstocks are essential for successful propagation of vines in South Africa
    - The rootstock and scion material produced from these mother blocks are used for grafting in the nursery

  • Grafting Process

    Grafting Process

    - The scion (wine or table grapes) is grafted onto the rootstock
    - There are different grafting methods, but bench grafting is mainly used in grape industry
    - Long whip grafting - done by hand
    - Omega grafting - done by machine

  • Callus

    Callus

    - After grafting, the grafted combination is treated in various ways, i.e. waxing, to prevent drying out of plant material
    - It is placed under controlled conditions for ideal humidity and temperature to stimulate callus forming of the grafting joint

  • Nursery

    Nursery

    - After completion of the callus forming process the vines are planted in specially prepared fields during early spring
    - the plants develop a strong root system from the grafted rootstock and vigorous top growth from the scion cultivar
    - After eight months in the nursery field beds, the vines are removed, selected and certified before delivery to the grape producer

  • New Vineyard

    New Vineyard

    - The grape farmer places an order with the nursery 18 months prior to planting his vineyard
    - The order is based on advice from the viticulturist for the most suitable grafting combination in relation to soil and climate conditions
    - At the end of winter the farmer collects the specific grafting combination for planting in his new vineyard

  • Consumer

    Consumer

    - Consumer preferences dictate the development of grape varieties
    - The development and selection of new varieties is an on-going process focused on satisfying ever-changing consumer tastes

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Contact Johan Wiese or Andrew Teubes:

Tel 021 864 1018 Fax 021 864 3689 e-mail vgroenberg@vgb.co.za www.vgnurseries.co.za