Growing Grapevines in Outdoor Containers
GROWING STANDARD GRAPEVINES IN CONTAINERS
This is an attractive, if not very productive way of growing grapes but is both useful and interesting for conservatories, although careful attention must be paid to pest and disease control. It was a very popular method in Victorian times when entire potted plants were brought into dining rooms for guests to pick their own fresh fruit.
Use a terracotta pot of about 40cm (16in) diameter with a -based compost such as John Innes No. 3. A single stem is trained vertically, supported by a stout cane, to a height of about 1.2m (4ft). Six lateral shoots are allowed to develop from the apex (all others are rubbed out) and pinched out beyond the flower cluster, just as with normal vine . The lateral shoots are allowed to droop downwards and are supported by soft string tied to the top of the support cane. Each winter, the lateral shoots are pruned back to two buds from their bases. As with any container-grown plant, careful attention must be given to ensure that the compost doesn’t dry out and a high potash liquid feed should be given every two weeks during the growing season.