According to Houbraken, he learned to paint from his father Pieter van Bronckhorst, who died when he was thirteen. The young Bronckhorst was sent to work as a pastry baker for a cousin in Haarlem. He drew as a hobby, and it remained a hobby until he moved back to Hoorn to get married. He specialized in painting plants, birds, and insects. Although he remained a pastry baker, he did very well with his watercolours, which were published in engravings and commemorated with a poem by Johannes Vollenhove.^[1]

His pupils were Hendrik Graauw and Herman Henstenburgh.^[2] Both Bronckhorst and Herman Henstenburgh worked for Agnes Block painting animals, insects and plants from her garden