QuestionsHow to growGreenhouse GrowingGrapesCare of grapes 0 Vote Up Vote Down Vera Tuite asked 16 years ago When can I redirect a grapevine in the glasshouse 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago A grape vine is completely flexible, except for very old thick vines, at all times and you can untie and re-train it at any time. You will get more information on grapes in Garden know-how: How to grow: Greenhouse growing: Grapes