Soil: We Need to Stop Treating it Like Dirt

Gardeners can improve their soil.

Why is soil important for gardeners?

We’ve all heard about growing the right plants in the right places so they’ll survive, but without healthy soil, your plants (even the right plants) will suffer or even die. So let’s look at what’s under our feet.

 (This article is an updated version of one I wrote for a garden blog several years ago, which is no longer available online.)

Healthy soil ecosystems are a complex interaction
 between bacteria, fungi, insects, & more.

Soil: the ecosystem beneath our feet

Soil found in native habitats is a complex ecosystem of bacteria, fungi, nematodes, earthworms, ants, salamanders, toads, insect larvae, moles, and more, all living in a substrate of minerals and humus. The minerals are a mixture of rocks, sand, silt, and/or clay. The humus or organic matter consists of fully or partially digested plant and animal parts. As humus is broken down into simple compounds, it provides a living for the decomposers, and eventually yields nutrients for plants. 

One gram (about 1/5 teaspoon) of healthy, non-poisoned soil could contain one hundred million bacteria, one million actinomycetes (a filamentous bacteria), and one hundred thousand fungi; if strung together, their filaments or hyphae would measure about 16 feet (5 meters) in length. This same gram of soil could also contain hundreds of nematodes living on the damp surfaces of the soil particles and maybe a few insect eggs or larvae and some earthworm cocoons. The exact proportions of each of these organisms will depend on soil conditions such as moisture, acidity, aeration, amount of humus, and the local plant community growing in the soil. 

A Quest for a Perfect Lawn: a Case Study

This graphic makes the point about how
out-of-step people are for trying to
maintain unnatural&unsustainable lawns.

To celebrate Earth Day, this post is about rethinking the "perfect" lawns, which are maintained with applications of fungicides, insecticides, herbicides, synthetic fertilizers, and never allowed to go into seasonal dormancy. In Florida winter-dormant grasses are over-seeded with cool-weather grasses, irrigated through the dry season, & fertilized. 

Today's lawn expectations go way back to how European formal gardens & lawns around castles and manor houses were kept to show others how wealthy the owners were.

Today, lawn-"care" organizations can make lots of money by encouraging homeowners to have "perfect" lawns, but does it make sense or cents? As a botanist, naturalist, and a sustainable gardener, I would say, "NO!" 

There are so many reasons for replacing most of your lawn acreage with unpoisoned native habitat & pollinator gardens and then freeing the remainder of your lawn from all pesticides & synthetic fertilizers, mowing it less often at the highest setting, letting it go dormant in the winter & allow a variety of plants that tolerate mowing to grow there.