His approach to plants was clinical yet decorative. In studies like *Stervormige bloem* and *Violen*, Wenckebach focused on the structural geometry of the specimens. He often isolated flowers against plain backgrounds to emphasise their form. This method was influenced by his work on the Verkade albums, which were educational nature books. He used watercolour and ink to document species such as edelweiss and water lilies with precision. His style avoided the messy textures of traditional impressionism in favour of clear outlines.

Collectors find value in the graphic quality of his botanical prints. The compositions are balanced and suit modern interiors that require a clean aesthetic. His book cover designs offer a unique way to display literary history as visual art. Wenckebach captures the transition from nineteenth-century realism to the stylised patterns of Art Nouveau. These pieces provide a calm, natural element for a gallery wall without appearing dated or overly ornate.