Roses

Roses have traditionally been planted at the end of vine rows. The plant is susceptible to the same fungal diseases as grapevines, mainly downy and powdery mildews, and their planting is supposed to give an early indication of a fungal attack and allows management to apply curative chemicals to the vines.
Most vineyards however apply fungicides systematically so the use of roses is now generally for aesthetic reasons only. On a recent trip to the Hunter Valley wine region I came across some pretty blooms at the Tyrrell's Vineyard