[1] While Geerts predominantly made oil paintings, he also used watercolors and ink drawings to create realistic and romantic portraits, pastoral and religious scenes, and still lifes with flowers and landscapes.

In addition to his original paintings, his works include numerous creative adaptations of well-known artists' works, such as Adriaen Brouwer, Václav Brožík, Henri De Braekeleer, and David Teniers II.

While not prominent in Antwerp's artistic scene, he did gain relative commercial success, with his works now held in private collections[citation needed] and auctions both in Belgium and abroad.

From 1880 to 1886, he attended painting courses taught by Lucas Victor Schaefels at the Royal Academy of Fine Arts in Antwerp.

He won the class' "ornement au trait d’après l’estampe"[clarification needed] contest in 1884.