Grape Vines That Produces Grapes That Split.

With the changeable weather conditions many fruiting plants such as grapes can split as the availability of water varies dramatically.If you grapes are growing in soil and the soil is dry after heavy rain the plant can take up too much water splitting the grapes.The best method to combat this is to add by a mulch and lightly forking into the soil lots of organic matter such as garden compost or well rotted farmyard manure or horse manure,this has the effect of spreading out the available water supplied to the plants avoiding the grapes splitting.If you grow grow you grapes in containers then its case of making sure you control the watering by watering little and often to maintain a level of available moisture.
Its also worth checking you soil or compost for the correct levels or iron and magnesium both these elements are key in the formation of fruits such as grapes.