This image shows a series of flower beds in bloom in Humboldt Park, on the west side of Chicago.
The description states:
FLOWER GARDEN, HUMBOLDT PARK
The Chicago Park District is noted for the beauty of its outdoor floral displays. One of the large exhibits shown here is the flower garden in Humboldt Park, 50,000 square feet in area.
–The park is at some remove from the ones discussed previously, which are on or near the Chicago waterfront. This park was opened in 1877 and is on the register of historic places. This card likely dates from the 1950s.