Career
As a young man he received an education in horticulture at the nursery of Karlsruhe Palace. In 1780 he became a gardener at Herrenhausen Gardens in Hanover, where he gained botanical experience from Jakob Friedrich Ehrhart (1742–1795), the director of the gardens. In 1817 Wendland was appointed inspector at Herrenhausen Gardens.
He specialized in the culture of vineyards and peach trees.
He created the illustrations for his published works. As a taxonomist, he circumscribed numerous plant genera and species.