Suburban Savanna - 1

Shortly after I started the 9-month Missouri Woodland Mentor series back in January, I started pondering whether the sterile suburban yards (highly fertilized, sprayed with pesticides, rigidly trimmed, full of non-native plants, toxic to most wildlife) could be transformed into something with a positive impact on the natural environment. It seemed to me that the definition of a savanna fit closest to what suburbs looked like on the surface: grass interspersed with trees providing less than 30% canopy cover.

There are some qualities of a suburb that would work against it becoming a full-fledged savanna:

There is too much impervious surface: streets, houses, sidewalks, driveways…which means that water will run off more quickly. There are often water retention ponds in newer developments to collect run off – somewhat slow the flow.

The building of the houses and infrastructure often is a severe disruption to the land: scraping off topsoil and hauling it away, removing almost all vegetation, and planting of turf. Sometimes there are a few trees planted by the builder – but they are not necessarily natives.  It takes a long time to recover from that disruption. It is the starting point for neighborhoods to progress toward a suburban savanna.

Even with those challenges, there are things I am already doing to nudge my yard toward the savanna goal:

• I don’t spray pesticides or herbicides….and I don’t fertilize.

• I don’t mow the fall leaves in my back yard until late spring (let the moths and insects emerge.

• The non-native trees to Missouri (a Kousa dogwood and an eastern white pine and a variety of holly) are not going to be cut down…but I am planting more native woody plants: pawpaw, fragrant sumac, spice bush (hosted spice bush swallowtail caterpillars last summer), red buckeye, elderberry, and Ozark witch hazel. A red maple and shortleaf pine are the two native trees that were already growing in my yard. The forsythia and Japanese barberry will eventually be dug up.

• The violets that were contained in a bed on the east side of the house when I moved here have been allowed to spill out taking over half the grass/moss area of that side yard. I have noticed more birds finding food in the debris from the violets over this past winter – even that small change has made a difference to birds.

• I have planted a native plant garden in the middle of my front yard. As it matures – I will extend it so that there will be less ‘turf’ remaining.

• Last summer I avoided mowing patches of clover I found growing in the year as a step toward improving the quality of the soil.

• I am learning to recognize goldenrod, asters, and Rudbekia coming up in my yard that I can simply mow around!

I will post next month about my progress transforming my yard into a suburban savanna. My focus currently is on my yard …but I will take every opportunity to encourage others in my neighborhood to begin the process as well.