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It comes from North America to Europe in the 17th century.
Habitus: Black locust has a shallow root system, the main vein develops numerous side veins that can be up to 20 meters long. It grows up to meters in height, and the trunk is up to 50 meters in diameter. The crown is branched and sparse, while the branches are thorny, mostly winding.
Flower: Its flowers are fragrant, have short stems and grow in bunches. The calyx is light green, bell-shaped and covered with hairs. It consists of 5 fused leaves, while the wreath is up to 2 cm long and made of white petals with a flag that has a yellow spot. The anthers have fused together into a tube, 9 of them, while one anther is free, the carpel has grown. The fruits are pendulous, flat pods 5-10 cm long, each containing 5-10 kidney shaped brown seeds. Individual pods remain hanging on the tree through the winter.
Leaves: leaves are 15-30 cm long, compound, oddly pinnate and located on a very short stem.
Locust grows on dry, moderately moist and sandy soils. Good drainage is the most important thing for acacia, because it cannot tolerate water-retaining, compacted and eroded soils. It grows in areas with moderately moist soils, but can tolerate climates with less precipitation and mountain and lowland climatic zones. It needs a lot of sun, it does not tolerate shade.
Locust spreads vegetatively, i.e. by shoots or underground shoots. It can also reproduce by generative means. For planting a single tree, the easiest way to propagate acacia is by cuttings.
Robinia pseudoacacia var. Pendula
Robinia pseudoacacia var. Pyramidalis
Robinia pseudoacacia var. Decaisneana
Diseases: parasitic fungus, heart rot
Pests: locust grasshopper, moth
ArborTech project has been funded with the support from the European Commission, with the reference number 2021-1-SI01-KA220-VET-000028108. The content of this website reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.
