Characteristics of Buddleia
- Type: flowering shrub
- Height: up to 10m
- Flower color: red, white, pink, purple, blue
- Desired exposure: sunny
- Type of soil: normal, limestone, stony
- Foliage: obsolete
- Interview : Easy to maintain
- Sanitizing: no
- Varieties: buddleia Royal red, buddleia Empire blue, buddleia Black knight
Origins and characteristics of buddleia
called butterfly shrub or summer lilac, buddleia (or buddleja) deploys its pretty clusters of colorful flowers from July to October. Undemanding and resistant, it spreads in a pretty bush and is often cultivated in isolation or in ornamental hedge.
Native to Asia and more particularly from the lowlands of the Himalayas, the buddleia belongs to the Scrophulariaceae family. It owes its nickname of the tree to the butterflies of its fragrant clusters, which attract butterflies, and of summer lilacs from the striking resemblance of its flowers, both in terms of color and shape, with those of lilacs.
The genus includes 100 species of various colors: white, pink, red, purple and blue. The best known varieties are Royal red (red), Empire blue (blue), Black knight (purple) and White profusion (white).
It was introduced to Europe by Father David in 1869. The plant remained unknown in Europe until 1890 when the English botanist and doctor Augustine Henry rediscovered it in the province of Setchouan, in Asia.
It was found a lot in pleasure gardens in the 20th century. Very decorative, with its cluster-like flowers, it is a flower which is also very pretty in bouquet and which fits particularly well in a vase.
If it reaches its adult size in 4 to 5 years, its lifespan is very short, about ten years at the latest.
To know that the buddleia flowers are very poisonous for animals if swallowed.
Buddleia seeds can be easily and naturally transported over large areas, by wind or water. Several dormant seeds can remain in the soil for several years before germinating.
The plant is considered invasive because from seedlings, buddleia can quickly colonize new places in your garden. To limit colonization, mechanically limit its cultivation in the garden with suitable tools (pickaxe, pruning shears, etc.).
To obtain abundant flowering, it is advisable toinstall the buddleia in a sunny position. Regardless of the type of soil, it also likes in limestone and stony soils, hence its classification as an invasive plant. However, avoid planting it in a place particularly exposed to the wind.
It is recommended to plant in autumn preferably to promote the recovery of the roots. It can also be planted in a container in the spring, in March, provided you water it well throughout the summer season.
Fast growing, the shrub can reach 4 to 5 m in all directions in just a few years, if it is not pruned. A clear site is preferable in isolated plantation. In a flowering hedge, it goes very well with other shrubs such as the ceanothe, weigelia or the Mexican orange tree.
Very easy to maintain, the buddleia is a shrub, which resists cold, even when temperatures reach -20 ° C. It also withstands drought and weather and has no enemies or disease. It therefore requires little care and watering.
It is mainly pruned to resize it, to improve flowering or to rejuvenate it. For the latter case, do not hesitate to cut the branches openly, between November and March. Its recovery and flowering will be more intense.
Buddleia is propagated by cuttings in late summer or winter. Preferably choose the heel cuttings. Take a small piece of bark from the main branch, on which the cutting is attached.
Diseases and pests of buddleia
Introduced species, the buddleia quickly acclimated to the European climate. Very robust, it is extremely resistant to diseases and does not fear any parasites. Its robustness also makes it very resistant to weedkillers.