Early career, First Schleswig War Groenland was trained in pharmacology in his youth and served as a pharmacist in Altona,
Hamburg, and
Jena in his early 20s. In 1849, he joined the Schleswig-Holstein army to fight in the
First Schleswig War.
Life in Paris After the war, Groenland moved to
Paris to work as an assistant to
Louis de Vilmorin, a French biologist and horticulturist who was also a member of the family firm
Vilmorin-Andrieux. While working for Vilmorin, Groenland worked with Theodor Rümpler to prepare the German edition of
Les fleurs de pleine terre (''Vilmorin's illustrierte Blumengärtnerei''). Groenland spent almost twenty years living in Paris working as a botanical researcher and horticulturist. He was a founding member of the
Société botanique de France and was known for his work creating hybrids by crossing
Triticum vulgare with various species of
Aegilops.
Move to Dahme Groenland and his wife left Paris in May 1871 after the conclusion of the
Franco-Prussian War. They settled in
Dahme, Germany, where he worked as a botanist and professor of natural sciences at the Agricultural and Agricultural Chemistry Research Station until his death on 13 February 1891. At that time, he was also an active and important member of the Botanischer Verein der Provinz Brandenburg. ==Legacy==