Read the Soil Surface Clues
We have been talking about checking moisture before watering, usually down around 2 to 4 inches. That is a good habit to maintain, although as we move into the strongest sun and longest days of the year (summer solstice), there are also daily surface clues we can notice on our morning garden walks. The soil surface itself can teach us a lot. The surface takes the first hit from heat, hard rain, wind, and foot traffic. If it crusts over, water may start running off instead of soaking in. This tells us the surface structure is closing up. If it cracks open, the bed is telling us it has dried, tightened, and started pulling apart. This is most common in clay soil, especially when bare soil gets wet, then dries hard in the heat. If the soil under the mulch feels heavy, stays wet too long, or smells stale instead of earthy, it may need more air and less moisture. Roots need water, but they also need oxygen. If the mulch is thinning, the soil is slowly becoming more exposed to heat, evaporation, weeds, and pounding rain. At the same time though, if the mulch is disappearing, that can also be a good clue that worms, fungi, insects, and microbes are working it through. As organic matter becomes thin between plants, those open spaces become weak points in the garden bed. They lose moisture faster, heat up quicker, invite more weed pressure, and take the hardest hit when rain comes in fast. These are simple clues, but they teach us a lot about how the bed is functioning. We do not have to diagnose the whole garden at once, although it is important to notice these clues as they begin to appear so small corrections can be made before they become large issues. This week, pick one area and look closely at the surface. Lift the mulch in a few places, smell the soil, and look for crusting, cracks, worms, roots, dry pockets, soggy spots, thinning mulch, or bare patches. Then take one small action. Add a little compost or fresh mulch where the surface looks tired. Keep mulch pulled back from plant stems if the rain pushes it too tight. Gently loosen a sealed surface around the plants cultivating lightly to help water enter and air return.