How to Prune grapevine 'Blanc Seedless'?
Pruning is required to encourage flowering and fruiting, and to increase air circulation and so reduce the risk of disease: see grape pruning and training

grapevine 'Blanc Seedless' · Vitis 'Blanc Seedless'
Grow outdoors in full sun, in well-drained, humus-rich soil, preferably neutral to slightly alkaline, mulch to keep soil moist, and provide support; for more advice, see outdoor grape cultivation. Grow indoors in a greenhouse or conservatory to produce a good crop in cold areas, for detailed advice see indoor grape cultivation
Pruning is required to encourage flowering and fruiting, and to increase air circulation and so reduce the risk of disease: see grape pruning and training