According to Jan van Gool he was an avid gardener and his love of flowers made him become a pupil of Constantijn Netscher so that he could paint the flowers and other plants in his garden.
[1] He travelled to Düsseldorf in 1716 and received a gold chain and medal from Johann Wilhelm, Elector Palatine for his work.
[1] He had high hopes of painting more for the elector, but his patron died the same year, so Coenraet returned to the Netherlands.
[1] On his return, he became a member of the Confrerie Pictura in 1718 and was very successful in The Hague, receiving as much as 1,000 guilders for a work, but was later eclipsed by the flower painter Jan van Huysum.
[2] The Lazaro Galdiano Museum in Madrid owns a couple of Still lifes, one with fruits and the other a Vase with Flowers,[3] from Roepel.