Position
Crimson grapes love full sunshine but can survive partial shade. Because this vine produces a generous number of grape clusters, it needs to be supported by a sturdy fence or trellis. It also looks lovely draped over an unsightly wall.
Size
This vine can reach a height of about 4 metres with a spread of about 2.5 metres at maturity (between 5 and 10 years old). It provides beautiful shade thanks to its generous canopy.
Soil Type
Crimson grapevines grow beautifully in well-draining chalk, clay, loam, or sandy soil, as they are resilient. The soil should have a neutral to slightly alkaline pH.
Watering
As with most vines, the crimson grape does not like to be overwatered. Its roots reach deep into the soil, where it can get water. So, give it a slow, gentle watering once every two weeks if there hasn’t been much rain.
Mulching
Apply organic mulch to your plants year-round.
Use from 2 to 5 centimetres of pine bark mulch to protect the roots from UV damage and drying out. It retains moisture and maintains an optimal pH. Do not let the mulch touch the plant stem, as it may cause infection or rot.
Re-apply every 3-4 months.
Fertilising
Apply 1 teaspoon of our slow-release high-nitrogen all-plant fertiliser every 4-5 months. The roots will absorb what they need.
Pruning
This vine grows fast and needs continual pruning. Each vine should have only 4 branches (2 attached to the top wire of the trellis or fence and 2 to the bottom wire). Only 1 bud should be allowed to grow on either end of the vine. If more start to grow, cut them away. Without this vigorous pruning, your vine may well overwhelm the structure that’s supporting it.
Pests and Diseases
Treat promptly or preferably use preventative measures by spraying with agricultural Neem Oil or Effective Microorganisms (EM Control)
Harvesting
Crimson grapes are a late-season variety, which means that they can be harvested all through the summer months, and sometimes even into autumn
