Clematis viticella, also known as the Italian Clematis, belongs to Pruning Group 3. This group includes clematis varieties that bloom in late summer, such as Clematis viticella, Clematis jackmanii, and Clematis texensis. Pruning Group 3 clematis require regular pruning, typically done in February or March, before new growth begins.
Pruning Group 3 clematis are characterized by their ability to produce flowers on new growth, meaning they bloom on the current season’s growth rather than on old wood. This is an important factor to consider when determining the correct pruning group for clematis varieties.
To properly prune Group 3 clematis like Clematis viticella, it is recommended to cut back all of the stems to approximately 30cm (12 inches) above the ground. This is done in late winter or early spring, before the plant starts to actively grow. Pruning at this time allows the clematis to benefit from the upcoming growing season and produce healthy new growth, which will ultimately lead to abundant flowers later in the summer.
When pruning Group 3 clematis, it is important to make clean cuts just above a pair of healthy buds or nodes. This allows for new growth to emerge from these buds and promotes a more compact and manageable plant. It is also advisable to remove any dead or damaged stems during the pruning process, as well as any crossing or overcrowded branches. This helps improve air circulation and reduces the risk of disease.
It is worth noting that while Group 3 clematis can be pruned quite hard, it is important to avoid cutting them down to the ground. Leaving a few inches of stem above the ground ensures that the plant has some support and protection during the growing season.
In my personal experience, I have found that pruning Group 3 clematis, including Clematis viticella, at the recommended time and to the suggested height has resulted in vigorous growth and abundant flowering. Regular pruning helps to maintain the overall health and appearance of the plant, as well as encourage the production of new shoots and blooms.
To summarize, Clematis viticella belongs to Pruning Group 3. This group includes clematis varieties that flower in late summer and require regular pruning in February or March. By cutting back all the stems to 30cm above ground level, you can promote healthy new growth and ensure a beautiful display of flowers later in the season. Remember to make clean cuts just above healthy buds and remove any dead or damaged stems for optimal results.
