Luther College
OP-9: Landscape Management

Luther College Grounds does not include the area of buildings, parking lots, sidewalks, and the natural areas. The natural areas encompass an area around campus for educational and recreational use by students, faculty, staff, and visitors.

IPM on Luther's natural areas consists of using the lowest threat herbicides (e.g., glyphosate), using the minimum amount possible, and banning any high threat herbicides (e.g., 2,4-D is not allowed on any Luther lands). Alternatives to herbicides are the first consideration and are discussed below under management of invasive species. In addition, preemptive work is initiated where possible, including fostering native species growth and establishment to compete with weedy or invasive species establishment; and removing known, problematic invasive species when still at low abundances.

The college rents land to a local farmer who has committed to growing organic corn, hay and small grains in the fields. The fields are certified organic by the farmer each year.

In the central campus zone, Luther College uses native plants in its landscaping and on-campus grounds as much as possible. On the college's natural areas, we have restored or are working to restore Luther's land to the historic native forest, woodland, savanna or prairie ecosystems. The natural areas are managed for invasive species, including buckthorn and garlic mustard. Invasive species are managed with the minimum input of low-impact herbicide (glyphosate) as possible (e.g., treating only cut-stumps for buckthorn) or spot spraying for garlic mustard. Invasive species management is also attained through prescribed fires, manual/mechanical removal, and plantings of native species as replacements.

On central campus, one permeable parking lot has been installed, and a rain garden and savanna/prairie planting captures run off from the newly constructed science building (Sampson Hoffland Laboratories). Luther's natural areas along the river have recently been permanently protected by the Emergency Watershed Protection (EWP) Plan (see description above). The plantings of prairie and forest, along with existing forest along the river improve water retention and sediment capture in the floodplain of the Upper Iowa River. Prairie and forest plantings (not including the EWP or other already forested areas) were initiated to promote natural infiltration and reduce erosion in the 1980s and 1990s (approximately 80 acres).

Luther College composts or mulches 100% of its grounds-keeping waste. Grass clippings are composted in a separate pile and take longer to break down. As many of the leaves are mulched in the fall as possible, but some have to be vacuumed up and composted. The leaf pile breaks down more quickly and is usually used in the flower beds within a year. All the branches, tree limbs etc. are piled up throughout the season and once a year we hire a company to come in and grind them up. This is a lower grade of wood mulch than what would normally be used on the landscaped areas on campus but much of it is used on outlying areas. The compost piles are "turned" with a skid-loader every week or two.

Sampson Hoffland Laboratories has a partial green roof.

Luther college has a central campus that includes all of the central campus buildings, grounds, infrastructure, and surrounding athletic fields. Surrounding central campus, Luther owns and manages restored prairies, forests, woodlands, and savannas. Two additional natural areas (Lionberger Environmental Preserve and Freeport Marsh) are within 10 miles of the main campus. The total of Luther's natural areas (including approximately 60 acres of farmland) equals approximately 750 acres.