The U.S. National Register of Historic Places listing for the Lampert-Wildflower House included the surrounding yard, which maintains its historical integrity.
The Lamperts, as naturalists, kept the lawn as a haven for birds and wildflowers.
Today, the yard maintains its historic appearance; the front and back yards are planted with wildflowers instead of grass and the whole site is semi-wooded.
Most of the 32 trees on the less than 1-acre (4,000 m²) site are black walnut and maple.
Several endangered plant species are found in the yard as well as prairie and woodland plants of other types.

According to Jerry Paulson, with the Natural Land Institute in Rockford, Illinois, there are five kinds of "rare" plants found in the Wildflower House yard.
They are: Canadian violet, ginseng, prairie smoke, bellwort, and yellow violet.
Other, common, types of plants found in the yard include, wild grape, purple coneflower, ginger, scilla, ferns, and jack-in-the-pulpit.
In total, 36 different types of plants (not including the trees) have been identified on the Lampert-Wildflower lawn.
The U.S. National Register of Historic Places listing for the Lampert-Wildflower House included the surrounding yard, which maintains its historical integrity. The Lamperts, as naturalists, kept the lawn as a haven for birds and wildflowers. Today, the yard maintains its historic appearance; the front and back yards are planted with wildflowers instead of grass and the whole site is semi-wooded. Most of the 32 trees on the less than 1-acre (4,000 m²) site are black walnut and maple. Several endangered plant species are found in the yard as well as prairie and woodland plants of other types.
According to Jerry Paulson, with the Natural Land Institute in Rockford, Illinois, there are five kinds of "rare" plants found in the Wildflower House yard. They are: Canadian violet, ginseng, prairie smoke, bellwort, and yellow violet. Other, common, types of plants found in the yard include, wild grape, purple coneflower, ginger, scilla, ferns, and jack-in-the-pulpit. In total, 36 different types of plants (not including the trees) have been identified on the Lampert-Wildflower lawn.
Lampert-Wildflower House