In the mid-1800s, Wilhelm Roethke served as the head forester on the estate of Otto von Bismarck's sister in Pomerania. He resigned in 1870 and move to Berlin, where he established a flower shop. In 1872 or 1873 he emigrated to the United States, along with his wife Bertha and their three sons, Emil, Carl, and Otto. Roethke settled in Saginaw, where he opened a market garden and florist shop. In 1882, he purchased the 20-acre parcel where these houses now stand, and constructed a series of greenhouses to support the business. By 1901, the business was much expanded, and Carl and Otto were running it. The entire family lived together on their property.[2]
In 1904, Carl Roethke constructed a fieldstone-walled house (now 1759 Gratiot) near the greenhouses and moved into it with his family. Otto Roethke followed suit in 1911, constructing a hip-roof Colonial house (now 1805 Gratiot) for his family next to his brother's house. The elder Roethke died in 1911, leaving the florist business to Otto and Carl. By this time it was a large operation, employing 25 people. The brothers ran it until 1922, when Otto's heath began to fail. Carl bought out his brother, but died himself the next year, leaving his widow Margaret to run the business. The firm lasted into the 21st century.[2]
The Otto Roethke house at 1801 Gratiot is particularly notable as the childhood home of Otto's son, poet Theodore Roethke. He lived in the house from 1911, when it was constructed, until he entered the University of Michigan in 1925.[2]