These are the most common species in our regions. They can handle a few degrees of frost (-5 max). In regions with severe frost, cover the plant with a substantial layer of straw with plastic over it. You can put some sand on it to prevent it from blowing away.
These can therefore also be planted in plant borders with a few precautions. We can offer you a wide range of different shades of blue and white, flowering height, flowering period, flower type for deciduous species.