In this credit, we need to have developed a site map showing existing or planned structures, topography, orientation, sun and wind exposure, use of space, and existing vegetation. Our landscape architect did this, luckily (see image). For two points, we need to meet all of the following requirements:
a. Any turf must be drought-tolerant.
b. Do not use turf in densely shaded areas.
c. Do not use turf in areas with a slope of 25%.
d. Add mulch or soil amendments as appropriate.
e. All compacted soil (e.g., from construction vehicles) must be tilled to at least 6 inches.
We definitely did not use turf in any densely shaded areas, or on a slope of 4:1, and did add mulch where appropriate. I’m pretty sure all soil was tilled at least 6 inches, but nobody was out there measuring. The problem is drought-tolerant turf. Now, let me just say that our lot is extremely wet — we have basically a river running underneath our house, which feeds into the lake across the street. Because of that, we drilled a well (not very common for new homes in the city) for irrigation purposes. So to me, it did not seem necessary to get drought-tolerant turf.
We did consider it, though. From what I learned, some species are indeed more drought tolerant than others, but those species might not be the typical soft grass in which you want your kids to frolic. Additionally, it seems that you can actually train your lawn to be more drought tolerant through techniques like aeration, mowing, and proper watering techniques. The biggest consideration, though, seems to be which grass is best for our climate. Our landscapers recommended Kentucky Bluegrass, which is the most common and best known cool season grass. It actually can survive a drought by just going dormant. I learned that fine fescue, a cool season grass that is drought tolerant, does not tolerate wear and tear. That would not work so well for us. So…did we choose the wrong sod? I think not; it’s quite alright to forgo these two points.
Sustainable Sites points so far: 0
Cumulative points: 14
Additional points needed to get to Gold: 74