Outdoor & Protected Cultivation
Mulch, Groundcover & Soil-Surface Management
The soil surface affects evaporation, temperature, weed competition, splash, traffic, and frost heat exchange. Mulch and groundcover can be useful, but their effects change with material, thickness, weather, and season.
Key concepts
- Mulch can reduce surface evaporation and splash
- Organic surface layers can alter soil temperature and moisture patterns
- Dense groundcover competes for water and can change nighttime heat exchange
- Surface management also affects access for scouting and irrigation inspection
What to measure or observe
- Check moisture beneath and beyond the mulch layer
- Record soil temperature at comparable depths
- Inspect for persistent saturation or pest shelter
- Observe splash and erosion during heavy rain
Common mistakes
- Assuming mulch is always beneficial in every season
- Letting mulch contact stems continuously
- Using surface appearance to infer deeper moisture
- Ignoring groundcover water use
Visuals this lesson still needs
- Mulched versus bare soil water balance
- Soil-temperature profile
- Rain-splash comparison
- Stem-clearance mulch diagram