Heracleum sosnowskyi, or Sosnowsky's hogweed, is a monocarpic perennial herbaceous flowering plant in the carrot family Apiaceae.

The native ranges of Heracleum sosnowskyi and H. mantegazzianum, a close relative, overlap in the Caucasus region.

Heracleum sosnowskyi is 3–5 metres (10–16+1⁄2 ft) in height,[2] with a straight, firm stem that can reach a diameter of 12 centimetres (4+1⁄2 in).

It blooms from July to September and produces thousands of seeds, which are easily distributed by wind, but especially by water.

As Sosnowsky's hogweed is a monocarpic perennial species,[3] the entire plant (including the root) dies after flowering and producing seed.

[5] This implies that this species cannot be imported, cultivated, transported, sold commercially, planted, or intentionally released into the environment in the whole of the EU.