Köchel's reward was a knighthood and a generous financial settlement which permitted him to spend the rest of his life as a private scholar. Scientists of his day were greatly impressed by his botanical researches in North Africa, the Iberian Peninsula, Britain, the [North Cape]? and Russia.
In addition to botany, he was interested in geology and mineralogy, but he also loved music, and as a member of the Salzburg Mozarteum he published in 1862 a chronical and thematic register of the works of Mozart, the Köchel Catalogue, now in its 6th revised edition.