They are an early warning system, so to speak. If something like aphids or fungus is present, it will get on the roses first and in time, the grapes. It is like a canary in a coal mine.
Hi Mrs @dswigle
This is very unique. Roses are used as an early detection system to control pests in vineyards. I really just found out. At first, I thought the existence of roses was there only for beauty.
Of course, it's great to do a tour full of new knowledge. It wasn't just about tasting the different types of wine, but also about all the processes they went through and the history of the breweries there.
Have a nice day.