Hardy and vulnerable varieties

Which buddleia are hardy - and which are not?

Probably the most common are the two species Buddleja davidii and Buddleja alternifolia can be found in German gardens, both of which are reasonably hardy and can therefore be planted in the garden. They are suitable for a pot culture because of their rapid growth as well as their sheer size, with the exception of some specially low-bred varieties. Also the Buddleja var, which is well suited for the rock garden. nanhoenensis is hardy and can therefore stay outside. Completely not winter hardy and therefore only suitable for a bucket culture, however, species such as the sphericalBuddleia (Buddleja globosa), the Buddleja colvillei, which comes from the Himalayas, and the yellow buddleia (Buddleja x weyeriana), whereby the latter can remain outside in the wine climate.

Young Buddleia Need Winter protection

For the hardy species Buddleja davidii and Buddleja alternifolia, however, it applies that they only become resistant to cold with increasing age. From an age of approx. For five years, these Buddleia can withstand frosts down to minus 20 ° C, freshly planted and as a young plant however, they need a light frost protection in the form of a thick layer of mulch, which you can use in autumn spread. That Freeze back the shoots, on the other hand, are no longer tragic, as they become at least in the spring in B. davidii cut back anyway. Then the plant sprouts again.

Winter lilacs properly in the pot

In Buckets Cultivated Buddleia should be overwintered as frost-free as possible, even if it is a hardy species. Due to the small amount of substrate in the pot, the roots do not receive adequate protection in severe frost, but if they freeze back, the whole plant dies. Bucket Buddleia hibernates best in a bright and cool place at a maximum of 10 ° C. don't forget to water the plant from time to time, just that Fertilize should be discontinued from September.